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/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:14:25,949 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:14:25,951 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:14:25,963 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:14:25,964 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:14:25,965 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:14:25,966 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:14:25,968 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:14:25,969 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:14:25,970 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:14:25,971 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-28 10:14:25,994 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 [2018-09-28 10:14:26,009 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:14:26,009 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:14:26,010 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:14:26,010 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:14:26,011 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:14:26,011 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:14:26,011 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:14:26,011 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:14:26,012 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:14:26,012 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:14:26,012 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:14:26,012 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:14:26,012 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:14:26,012 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:14:26,013 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:14:26,013 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:14:26,013 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:14:26,013 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:14:26,014 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:14:26,014 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:14:26,014 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:14:26,014 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:14:26,014 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:14:26,015 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:14:26,015 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:14:26,015 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:14:26,015 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:14:26,015 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:14:26,015 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:14:26,016 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:14:26,069 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:14:26,083 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:14:26,089 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:14:26,091 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:14:26,092 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:14:26,093 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl [2018-09-28 10:14:26,094 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg-sophisticated.bpl' [2018-09-28 10:14:26,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:14:26,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:14:26,153 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:14:26,153 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:14:26,153 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:14:26,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:14:26" (1/1) ... [2018-09-28 10:14:26,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:14:26" (1/1) ... [2018-09-28 10:14:26,194 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-28 10:14:26,194 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-28 10:14:26,195 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-28 10:14:26,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:14:26,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:14:26,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:14:26,199 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:14:26,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:14:26" (1/1) ... [2018-09-28 10:14:26,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:14:26" (1/1) ... [2018-09-28 10:14:26,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:14:26" (1/1) ... [2018-09-28 10:14:26,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:14:26" (1/1) ... [2018-09-28 10:14:26,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:14:26" (1/1) ... [2018-09-28 10:14:26,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:14:26" (1/1) ... [2018-09-28 10:14:26,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:14:26" (1/1) ... [2018-09-28 10:14:26,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:14:26,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:14:26,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:14:26,224 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:14:26,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:14:26" (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 [2018-09-28 10:14:26,299 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-28 10:14:26,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-28 10:14:26,299 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-28 10:14:26,491 INFO L350 CfgBuilder]: Using library mode [2018-09-28 10:14:26,492 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:14:26 BoogieIcfgContainer [2018-09-28 10:14:26,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:14:26,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:14:26,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:14:26,497 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:14:26,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:14:26" (1/2) ... [2018-09-28 10:14:26,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@170b528d and model type Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:14:26, skipping insertion in model container [2018-09-28 10:14:26,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:14:26" (2/2) ... [2018-09-28 10:14:26,500 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg-sophisticated.bpl [2018-09-28 10:14:26,510 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:14:26,518 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:14:26,567 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:14:26,568 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:14:26,569 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:14:26,569 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:14:26,569 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:14:26,569 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:14:26,569 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:14:26,570 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:14:26,570 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:14:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-28 10:14:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:14:26,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:26,590 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:14:26,591 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:26,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:26,598 INFO L82 PathProgramCache]: Analyzing trace with hash 30240, now seen corresponding path program 1 times [2018-09-28 10:14:26,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:26,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:26,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:26,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:26,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:26,727 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:14:26,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:14:26,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:14:26,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:14:26,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-28 10:14:26,747 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-28 10:14:26,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:26,834 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-09-28 10:14:26,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:14:26,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 10:14:26,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:26,852 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:14:26,852 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:14:26,856 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 [2018-09-28 10:14:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:14:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-28 10:14:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:14:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-28 10:14:26,901 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-28 10:14:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:26,901 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-28 10:14:26,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:14:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-28 10:14:26,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:14:26,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:26,902 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-28 10:14:26,903 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:26,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:26,903 INFO L82 PathProgramCache]: Analyzing trace with hash 28755491, now seen corresponding path program 1 times [2018-09-28 10:14:26,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:26,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:26,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:26,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:26,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:27,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:27,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:27,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:27,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:27,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:27,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:14:27,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:14:27,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:14:27,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:14:27,108 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 4 states. [2018-09-28 10:14:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:27,157 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-28 10:14:27,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:14:27,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-28 10:14:27,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:27,159 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:14:27,159 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:14:27,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:14:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:14:27,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-09-28 10:14:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:14:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-28 10:14:27,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-28 10:14:27,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:27,163 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-28 10:14:27,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:14:27,164 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-28 10:14:27,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:14:27,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:27,164 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-28 10:14:27,164 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:27,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:27,165 INFO L82 PathProgramCache]: Analyzing trace with hash 28757413, now seen corresponding path program 1 times [2018-09-28 10:14:27,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:27,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:27,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:27,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:27,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:27,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:27,213 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 [2018-09-28 10:14:27,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:27,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:27,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:27,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:14:27,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:14:27,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:14:27,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:14:27,260 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 4 states. [2018-09-28 10:14:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:27,286 INFO L93 Difference]: Finished difference Result 12 states and 15 transitions. [2018-09-28 10:14:27,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:14:27,287 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2018-09-28 10:14:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:27,287 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:14:27,287 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:14:27,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-28 10:14:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:14:27,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-09-28 10:14:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:14:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2018-09-28 10:14:27,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 5 [2018-09-28 10:14:27,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:27,292 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2018-09-28 10:14:27,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:14:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2018-09-28 10:14:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:14:27,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:27,293 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-28 10:14:27,293 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:27,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:27,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1863917926, now seen corresponding path program 2 times [2018-09-28 10:14:27,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:27,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:27,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:27,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:27,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:27,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:27,373 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 [2018-09-28 10:14:27,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:27,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:27,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:27,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:27,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:27,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:14:27,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:14:27,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:14:27,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:14:27,436 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 5 states. [2018-09-28 10:14:27,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:27,524 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-28 10:14:27,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:14:27,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-28 10:14:27,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:27,526 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:14:27,526 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:14:27,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:14:27,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:14:27,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-28 10:14:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:14:27,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-28 10:14:27,530 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-28 10:14:27,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:27,531 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-28 10:14:27,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:14:27,531 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-28 10:14:27,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:14:27,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:27,532 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-28 10:14:27,532 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:27,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:27,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1863919848, now seen corresponding path program 1 times [2018-09-28 10:14:27,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:27,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:27,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:27,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:27,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:27,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:27,686 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 [2018-09-28 10:14:27,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:27,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:27,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:27,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:14:27,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:14:27,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:14:27,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:14:27,736 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-28 10:14:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:27,890 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2018-09-28 10:14:27,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:14:27,891 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-28 10:14:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:27,892 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:14:27,892 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:14:27,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:14:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:14:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2018-09-28 10:14:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:14:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-28 10:14:27,896 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-28 10:14:27,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:27,897 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-28 10:14:27,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:14:27,897 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-28 10:14:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:14:27,898 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:27,898 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-28 10:14:27,898 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:27,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:27,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1865764968, now seen corresponding path program 2 times [2018-09-28 10:14:27,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:27,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:27,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:27,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:27,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:28,019 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 [2018-09-28 10:14:28,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:28,051 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:28,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:28,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:28,079 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:14:28,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:14:28,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:14:28,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:14:28,080 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 5 states. [2018-09-28 10:14:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:28,137 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-28 10:14:28,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:14:28,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-28 10:14:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:28,139 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:14:28,139 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:14:28,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:14:28,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:14:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 12. [2018-09-28 10:14:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:14:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-28 10:14:28,152 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2018-09-28 10:14:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:28,153 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-28 10:14:28,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:14:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-28 10:14:28,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:14:28,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:28,154 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2018-09-28 10:14:28,157 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:28,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:28,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1865766890, now seen corresponding path program 2 times [2018-09-28 10:14:28,158 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:28,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:28,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:28,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:28,216 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 [2018-09-28 10:14:28,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:28,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:28,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:28,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:28,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:14:28,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:14:28,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:14:28,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:14:28,257 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 5 states. [2018-09-28 10:14:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:28,293 INFO L93 Difference]: Finished difference Result 16 states and 21 transitions. [2018-09-28 10:14:28,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:14:28,294 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2018-09-28 10:14:28,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:28,296 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:14:28,296 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:14:28,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-28 10:14:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:14:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-09-28 10:14:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:14:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2018-09-28 10:14:28,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2018-09-28 10:14:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:28,301 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2018-09-28 10:14:28,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:14:28,301 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2018-09-28 10:14:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:14:28,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:28,302 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-28 10:14:28,302 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:28,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:28,302 INFO L82 PathProgramCache]: Analyzing trace with hash 223459305, now seen corresponding path program 3 times [2018-09-28 10:14:28,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:28,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:28,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:28,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,356 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:28,356 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 [2018-09-28 10:14:28,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:28,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:14:28,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:28,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,451 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:28,451 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:14:28,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:14:28,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:14:28,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:28,452 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 6 states. [2018-09-28 10:14:28,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:28,549 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-28 10:14:28,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:14:28,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:14:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:28,550 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:14:28,551 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:14:28,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:28,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:14:28,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-28 10:14:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:14:28,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:14:28,557 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-28 10:14:28,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:28,557 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:14:28,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:14:28,558 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:14:28,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:14:28,558 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:28,558 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:14:28,559 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:28,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:28,559 INFO L82 PathProgramCache]: Analyzing trace with hash 223461227, now seen corresponding path program 3 times [2018-09-28 10:14:28,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:28,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:28,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:28,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:28,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:28,619 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 [2018-09-28 10:14:28,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:28,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:14:28,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:28,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:28,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:28,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:14:28,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:14:28,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:14:28,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:28,666 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-28 10:14:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:28,730 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-28 10:14:28,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:14:28,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:14:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:28,731 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:14:28,731 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:14:28,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:14:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-28 10:14:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:14:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-28 10:14:28,736 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-28 10:14:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:28,736 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-28 10:14:28,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:14:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-28 10:14:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:14:28,737 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:28,737 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:14:28,738 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:28,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:28,738 INFO L82 PathProgramCache]: Analyzing trace with hash 225306347, now seen corresponding path program 4 times [2018-09-28 10:14:28,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:28,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:28,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:28,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:28,789 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 [2018-09-28 10:14:28,798 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:28,805 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:28,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:28,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:28,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:14:28,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:14:28,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:14:28,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:28,832 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-28 10:14:28,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:28,868 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2018-09-28 10:14:28,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:14:28,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:14:28,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:28,870 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:14:28,870 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:14:28,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:28,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:14:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2018-09-28 10:14:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:14:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:14:28,876 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-28 10:14:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:28,876 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:14:28,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:14:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:14:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:14:28,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:28,877 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:14:28,877 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:28,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:28,878 INFO L82 PathProgramCache]: Analyzing trace with hash 225308269, now seen corresponding path program 5 times [2018-09-28 10:14:28,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:28,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:28,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:28,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:28,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:28,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:29,007 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:29,064 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:14:29,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:29,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:29,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:29,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:14:29,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:14:29,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:14:29,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:29,110 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-28 10:14:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:29,286 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2018-09-28 10:14:29,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:14:29,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:14:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:29,288 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:14:29,288 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:14:29,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:14:29,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2018-09-28 10:14:29,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:14:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-28 10:14:29,293 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-28 10:14:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:29,293 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-28 10:14:29,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:14:29,293 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-28 10:14:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:14:29,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:29,294 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:14:29,294 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:29,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:29,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1998466667, now seen corresponding path program 6 times [2018-09-28 10:14:29,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:29,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:29,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:29,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:29,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:29,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:29,343 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 [2018-09-28 10:14:29,355 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:29,362 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:14:29,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:29,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:29,392 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:29,393 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:14:29,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:14:29,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:14:29,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:29,394 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 6 states. [2018-09-28 10:14:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:29,427 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-28 10:14:29,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:14:29,427 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:14:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:29,428 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:14:29,428 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:14:29,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:14:29,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2018-09-28 10:14:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:14:29,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:14:29,434 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-28 10:14:29,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:29,434 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:14:29,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:14:29,435 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:14:29,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:14:29,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:29,435 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:14:29,436 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:29,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:29,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1998468589, now seen corresponding path program 7 times [2018-09-28 10:14:29,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:29,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:29,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:29,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:29,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:29,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:29,512 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 [2018-09-28 10:14:29,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:29,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:29,553 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:29,553 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:14:29,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:14:29,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:14:29,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:29,554 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-28 10:14:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:29,588 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-28 10:14:29,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:14:29,588 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:14:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:29,589 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:14:29,589 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:14:29,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:29,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:14:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2018-09-28 10:14:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:14:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:14:29,595 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 9 [2018-09-28 10:14:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:29,595 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:14:29,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:14:29,595 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:14:29,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:14:29,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:29,596 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1] [2018-09-28 10:14:29,596 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:29,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2000313709, now seen corresponding path program 8 times [2018-09-28 10:14:29,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:29,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:29,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:29,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:29,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:29,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:29,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:29,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:29,679 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:29,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:29,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:29,704 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:29,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:14:29,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:14:29,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:14:29,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:29,705 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 6 states. [2018-09-28 10:14:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:29,764 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2018-09-28 10:14:29,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:14:29,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:14:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:29,766 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:14:29,766 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:14:29,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:29,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:14:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2018-09-28 10:14:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:14:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:14:29,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 9 [2018-09-28 10:14:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:29,773 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:14:29,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:14:29,773 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:14:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:14:29,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:29,774 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1] [2018-09-28 10:14:29,774 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:29,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:29,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2000315631, now seen corresponding path program 3 times [2018-09-28 10:14:29,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:29,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:29,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:29,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:29,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:30,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:30,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:30,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:30,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-28 10:14:30,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:30,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:30,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:30,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:14:30,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:14:30,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:14:30,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:30,055 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 6 states. [2018-09-28 10:14:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:30,106 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2018-09-28 10:14:30,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:14:30,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2018-09-28 10:14:30,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:30,108 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:14:30,108 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:14:30,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-28 10:14:30,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:14:30,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-09-28 10:14:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:14:30,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2018-09-28 10:14:30,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 9 [2018-09-28 10:14:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:30,114 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2018-09-28 10:14:30,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:14:30,114 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2018-09-28 10:14:30,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:30,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:30,115 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-28 10:14:30,115 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:30,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:30,116 INFO L82 PathProgramCache]: Analyzing trace with hash -4277844, now seen corresponding path program 4 times [2018-09-28 10:14:30,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:30,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:30,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:30,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:30,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:30,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:30,279 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 [2018-09-28 10:14:30,288 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:30,308 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:30,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:30,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:30,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:30,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:30,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:30,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:30,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:30,340 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand 7 states. [2018-09-28 10:14:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:30,383 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-28 10:14:30,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:30,383 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:30,384 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:14:30,384 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:14:30,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:14:30,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-28 10:14:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:14:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:14:30,393 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:14:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:30,393 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:14:30,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:14:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:30,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:30,394 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:14:30,394 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:30,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:30,395 INFO L82 PathProgramCache]: Analyzing trace with hash -4275922, now seen corresponding path program 9 times [2018-09-28 10:14:30,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:30,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:30,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:30,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:30,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:30,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:30,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:30,469 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 [2018-09-28 10:14:30,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:30,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-28 10:14:30,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:30,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:30,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:30,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:30,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:30,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:30,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:30,510 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:14:30,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:30,548 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-28 10:14:30,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:30,549 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:30,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:30,549 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:14:30,550 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:14:30,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:30,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:14:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-28 10:14:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:14:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:14:30,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-28 10:14:30,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:30,558 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:14:30,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:14:30,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:30,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:30,559 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:14:30,559 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:30,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:30,560 INFO L82 PathProgramCache]: Analyzing trace with hash -2430802, now seen corresponding path program 10 times [2018-09-28 10:14:30,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:30,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:30,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:30,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:30,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:30,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:30,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:30,666 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:30,684 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:30,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:30,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:30,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:30,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:30,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:30,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:30,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:30,717 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-28 10:14:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:30,793 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-28 10:14:30,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:30,794 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:30,795 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:14:30,795 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:14:30,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:30,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:14:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-28 10:14:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:14:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:14:30,810 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:14:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:30,810 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:14:30,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:14:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:30,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:30,811 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:14:30,811 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:30,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:30,812 INFO L82 PathProgramCache]: Analyzing trace with hash -2428880, now seen corresponding path program 11 times [2018-09-28 10:14:30,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:30,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:30,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:30,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:30,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:30,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:30,965 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 [2018-09-28 10:14:30,973 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:30,979 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-28 10:14:30,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:30,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:31,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:31,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:31,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:31,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:31,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:31,008 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:14:31,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:31,165 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-28 10:14:31,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:31,165 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:31,166 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:14:31,166 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:14:31,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:14:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-28 10:14:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:14:31,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:14:31,173 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-28 10:14:31,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:31,173 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:14:31,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:31,174 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:14:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:31,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:31,174 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:14:31,175 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:31,175 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:31,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1770729518, now seen corresponding path program 12 times [2018-09-28 10:14:31,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:31,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:31,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:31,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:31,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:31,359 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 [2018-09-28 10:14:31,367 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:31,375 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-28 10:14:31,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:31,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:31,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:31,415 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:31,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:31,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:31,416 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-28 10:14:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:31,527 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-28 10:14:31,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:31,529 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:31,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:31,529 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:14:31,529 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:14:31,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:31,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:14:31,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-09-28 10:14:31,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:14:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:14:31,537 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:14:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:31,537 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:14:31,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:14:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:31,538 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:31,538 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:14:31,538 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:31,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:31,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1770731440, now seen corresponding path program 13 times [2018-09-28 10:14:31,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:31,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:31,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:31,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:31,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:31,611 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 [2018-09-28 10:14:31,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:31,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:31,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:31,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:31,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:31,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:31,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:31,666 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:14:31,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:31,802 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-28 10:14:31,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:31,802 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:31,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:31,803 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:14:31,803 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:14:31,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:31,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:14:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2018-09-28 10:14:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:14:31,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:14:31,811 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-28 10:14:31,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:31,811 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:14:31,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:31,811 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:14:31,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:31,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:31,812 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:14:31,812 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:31,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:31,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1772576560, now seen corresponding path program 14 times [2018-09-28 10:14:31,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:31,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:31,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:31,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:31,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:31,873 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 [2018-09-28 10:14:31,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:31,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:31,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:31,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:31,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:31,933 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:31,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:31,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:31,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:31,934 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-28 10:14:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:31,974 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2018-09-28 10:14:31,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:31,976 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:31,977 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:14:31,977 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:14:31,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:14:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-09-28 10:14:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:14:31,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:14:31,986 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:14:31,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:31,986 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:14:31,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:31,986 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:14:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:31,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:31,987 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:14:31,987 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:31,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:31,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578482, now seen corresponding path program 15 times [2018-09-28 10:14:31,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:31,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:31,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:31,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:32,031 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:32,031 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 [2018-09-28 10:14:32,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:32,045 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-28 10:14:32,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:32,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:32,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:32,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:32,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:32,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:32,073 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:14:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:32,251 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2018-09-28 10:14:32,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:32,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:32,252 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:14:32,252 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:14:32,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:14:32,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2018-09-28 10:14:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:14:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:14:32,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-28 10:14:32,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:32,263 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:14:32,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:32,263 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:14:32,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:32,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:32,264 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:14:32,264 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:32,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:32,265 INFO L82 PathProgramCache]: Analyzing trace with hash 675780526, now seen corresponding path program 16 times [2018-09-28 10:14:32,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:32,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:32,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:32,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:32,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:32,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:32,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:32,647 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:32,672 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:32,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:32,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:32,705 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:32,705 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:32,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:32,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:32,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:32,706 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 7 states. [2018-09-28 10:14:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:32,785 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:14:32,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:32,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:32,785 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:14:32,785 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:14:32,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:32,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:14:32,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-28 10:14:32,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:32,794 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-28 10:14:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:32,795 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:32,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:32,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:32,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:32,795 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:14:32,796 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:32,796 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:32,796 INFO L82 PathProgramCache]: Analyzing trace with hash 675782448, now seen corresponding path program 17 times [2018-09-28 10:14:32,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:32,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:32,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:32,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:32,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:32,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:32,876 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 [2018-09-28 10:14:32,884 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:32,895 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-09-28 10:14:32,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:32,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:32,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:32,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:32,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:32,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:32,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:32,923 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-28 10:14:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:33,014 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:14:33,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:33,015 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:33,015 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:14:33,015 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:14:33,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:14:33,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2018-09-28 10:14:33,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:14:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:14:33,025 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:14:33,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:33,025 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:14:33,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:33,026 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:14:33,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:33,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:33,026 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:14:33,026 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:33,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:33,027 INFO L82 PathProgramCache]: Analyzing trace with hash 677627568, now seen corresponding path program 18 times [2018-09-28 10:14:33,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:33,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:33,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:33,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:33,079 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 [2018-09-28 10:14:33,089 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:33,100 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-28 10:14:33,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:33,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:33,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:33,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:33,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,137 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:14:33,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:33,198 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:14:33,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:33,198 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:33,199 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:14:33,199 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:14:33,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:14:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-28 10:14:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:33,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:33,208 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-28 10:14:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:33,208 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:33,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:33,208 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:33,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:33,209 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:14:33,209 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:33,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:33,209 INFO L82 PathProgramCache]: Analyzing trace with hash 677629490, now seen corresponding path program 19 times [2018-09-28 10:14:33,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:33,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:33,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:33,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:33,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:33,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:33,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,297 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:33,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:33,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:33,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:33,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,298 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-28 10:14:33,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:33,395 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:14:33,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:33,396 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:33,396 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:14:33,397 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:14:33,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:14:33,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 16. [2018-09-28 10:14:33,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:14:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:14:33,404 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 11 [2018-09-28 10:14:33,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:33,404 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:14:33,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:14:33,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:33,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:33,405 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1] [2018-09-28 10:14:33,405 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:33,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:33,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1844179408, now seen corresponding path program 20 times [2018-09-28 10:14:33,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:33,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:33,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:33,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:33,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:33,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:33,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:33,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:33,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:33,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:33,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,526 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 7 states. [2018-09-28 10:14:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:33,560 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-28 10:14:33,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:33,561 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:33,561 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:14:33,562 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:14:33,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:14:33,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-09-28 10:14:33,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:33,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:33,573 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-28 10:14:33,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:33,573 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:33,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:33,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:33,574 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:14:33,574 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:33,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:33,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1844177486, now seen corresponding path program 21 times [2018-09-28 10:14:33,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:33,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:33,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:33,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:33,610 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 [2018-09-28 10:14:33,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:33,624 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-28 10:14:33,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:33,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:33,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:33,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:33,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:33,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,650 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-28 10:14:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:33,686 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-28 10:14:33,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:33,686 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:33,687 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:14:33,687 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:14:33,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:14:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2018-09-28 10:14:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:14:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:14:33,698 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2018-09-28 10:14:33,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:33,698 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:14:33,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:14:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:33,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:33,699 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1] [2018-09-28 10:14:33,699 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:33,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:33,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1842332366, now seen corresponding path program 22 times [2018-09-28 10:14:33,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:33,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:33,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:33,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:33,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:33,737 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 [2018-09-28 10:14:33,745 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:33,750 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:33,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:33,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:33,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:33,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:33,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:33,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,778 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 7 states. [2018-09-28 10:14:33,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:33,830 INFO L93 Difference]: Finished difference Result 25 states and 34 transitions. [2018-09-28 10:14:33,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:33,830 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:33,830 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:14:33,830 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:14:33,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:14:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2018-09-28 10:14:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:33,841 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 11 [2018-09-28 10:14:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:33,842 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:33,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:33,842 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:33,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:14:33,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:33,842 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2018-09-28 10:14:33,843 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:33,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:33,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1842330444, now seen corresponding path program 4 times [2018-09-28 10:14:33,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:33,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:33,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:33,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:33,905 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 [2018-09-28 10:14:33,915 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:33,946 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:33,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:33,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:33,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:33,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:14:33,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:14:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:14:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:33,981 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 7 states. [2018-09-28 10:14:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:34,098 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2018-09-28 10:14:34,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:14:34,098 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2018-09-28 10:14:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:34,099 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:14:34,099 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:14:34,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-28 10:14:34,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:14:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 14. [2018-09-28 10:14:34,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:14:34,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2018-09-28 10:14:34,105 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 11 [2018-09-28 10:14:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:34,106 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2018-09-28 10:14:34,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:14:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2018-09-28 10:14:34,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:34,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:34,107 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-28 10:14:34,107 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:34,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash 183654063, now seen corresponding path program 5 times [2018-09-28 10:14:34,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:34,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:34,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:34,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:34,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:34,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:34,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:34,182 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:34,258 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:14:34,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:34,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:34,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:34,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:34,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:34,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:34,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:34,299 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand 8 states. [2018-09-28 10:14:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:34,477 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:14:34,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:34,478 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:34,478 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:14:34,478 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:14:34,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:14:34,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-28 10:14:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:34,491 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:34,491 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:34,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:34,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:34,492 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:14:34,492 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:34,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:34,492 INFO L82 PathProgramCache]: Analyzing trace with hash 183655985, now seen corresponding path program 23 times [2018-09-28 10:14:34,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:34,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:34,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:34,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:34,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:34,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:34,545 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 [2018-09-28 10:14:34,553 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:34,560 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:14:34,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:34,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:34,566 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:34,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:34,587 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:34,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:34,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:34,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:34,588 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:34,632 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:14:34,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:34,633 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:34,633 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:14:34,633 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:14:34,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:14:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-28 10:14:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:34,647 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:14:34,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:34,647 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:34,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:34,647 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:34,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:34,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:34,648 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:14:34,648 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:34,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:34,648 INFO L82 PathProgramCache]: Analyzing trace with hash 185501105, now seen corresponding path program 24 times [2018-09-28 10:14:34,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:34,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:34,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:34,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:34,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:34,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:34,715 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 [2018-09-28 10:14:34,724 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:34,731 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-28 10:14:34,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:34,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:34,760 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:34,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:34,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:34,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:34,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:34,760 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:14:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:34,808 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:14:34,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:34,809 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:34,809 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:14:34,809 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:14:34,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:14:34,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-28 10:14:34,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:34,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:34,823 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:34,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:34,824 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:34,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:34,824 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:34,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:34,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:34,824 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:34,825 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:34,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:34,825 INFO L82 PathProgramCache]: Analyzing trace with hash 185503027, now seen corresponding path program 25 times [2018-09-28 10:14:34,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:34,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:34,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:34,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:34,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:34,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:34,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-28 10:14:34,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:34,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:34,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:34,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:34,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:34,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:34,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:34,952 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:35,014 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:14:35,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:35,014 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:35,015 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:14:35,015 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:14:35,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:14:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-28 10:14:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:14:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:14:35,027 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-28 10:14:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:35,027 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:14:35,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:14:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:35,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:35,027 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:14:35,028 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:35,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:35,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1958661425, now seen corresponding path program 26 times [2018-09-28 10:14:35,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:35,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:35,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:35,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:35,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:35,187 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 [2018-09-28 10:14:35,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:35,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:35,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:35,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:35,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:35,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:35,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:35,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:35,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:35,230 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-28 10:14:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:35,275 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:14:35,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:35,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:35,276 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:14:35,276 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:14:35,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:14:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-28 10:14:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:35,289 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:35,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:35,289 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:35,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:35,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:35,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:35,290 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:35,290 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:35,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:35,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1958663347, now seen corresponding path program 27 times [2018-09-28 10:14:35,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:35,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:35,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:35,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:35,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:35,340 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 [2018-09-28 10:14:35,349 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:35,356 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:14:35,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:35,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,381 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:35,381 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:35,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:35,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:35,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:35,382 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:35,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:35,424 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:14:35,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:35,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:35,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:35,425 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:14:35,425 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:14:35,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:14:35,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-28 10:14:35,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:35,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:35,439 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:14:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:35,439 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:35,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:35,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:35,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:35,440 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:35,440 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:35,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:35,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1960508467, now seen corresponding path program 28 times [2018-09-28 10:14:35,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:35,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:35,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:35,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:35,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:35,506 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 [2018-09-28 10:14:35,515 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:35,533 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:35,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:35,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:35,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:35,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:35,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:35,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:35,559 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:14:35,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:35,622 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-28 10:14:35,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:35,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:35,622 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:14:35,622 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:14:35,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:35,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:14:35,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-28 10:14:35,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:35,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:35,637 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:35,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:35,637 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:35,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:35,638 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:35,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:35,638 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:35,638 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:35,638 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:35,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:35,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1960510389, now seen corresponding path program 29 times [2018-09-28 10:14:35,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:35,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:35,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:35,640 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:35,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:35,701 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 [2018-09-28 10:14:35,708 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:35,714 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:14:35,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:35,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:35,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:35,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:35,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:35,744 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:35,778 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-28 10:14:35,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:35,779 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:35,779 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:14:35,780 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:14:35,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:35,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:14:35,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-28 10:14:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:14:35,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:14:35,789 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-28 10:14:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:35,789 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:14:35,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:35,789 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:14:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:35,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:35,790 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:14:35,790 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:35,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:35,790 INFO L82 PathProgramCache]: Analyzing trace with hash 863712433, now seen corresponding path program 30 times [2018-09-28 10:14:35,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:35,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:35,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:35,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:35,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:35,947 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 [2018-09-28 10:14:35,955 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:35,961 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-28 10:14:35,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:35,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:35,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:35,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:35,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:35,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:35,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:35,987 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-28 10:14:36,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:36,043 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:14:36,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:36,044 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:36,044 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:14:36,044 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:14:36,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:14:36,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-28 10:14:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:36,061 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:36,062 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:36,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:36,062 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:36,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:36,062 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:36,063 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:36,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:36,063 INFO L82 PathProgramCache]: Analyzing trace with hash 863714355, now seen corresponding path program 31 times [2018-09-28 10:14:36,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:36,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:36,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:36,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:36,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:36,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:36,178 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 [2018-09-28 10:14:36,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:36,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:36,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:36,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:36,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:36,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:36,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:36,227 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:36,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:36,275 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:14:36,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:36,276 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:36,277 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:14:36,277 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:14:36,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:36,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:14:36,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-09-28 10:14:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:36,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:36,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:14:36,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:36,294 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:36,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:36,294 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:36,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:36,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:36,294 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:36,295 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:36,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:36,295 INFO L82 PathProgramCache]: Analyzing trace with hash 865559475, now seen corresponding path program 32 times [2018-09-28 10:14:36,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:36,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:36,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:36,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:36,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:36,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:36,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:36,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:36,388 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:36,388 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:36,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:36,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:36,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:36,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:36,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:36,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:36,414 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:14:36,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:36,463 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:14:36,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:36,463 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:36,464 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:14:36,464 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:14:36,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:14:36,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-28 10:14:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:36,488 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:36,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:36,488 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:36,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:36,488 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:36,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:36,488 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:36,489 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:36,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:36,489 INFO L82 PathProgramCache]: Analyzing trace with hash 865561397, now seen corresponding path program 33 times [2018-09-28 10:14:36,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:36,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:36,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:36,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:36,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:37,013 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 [2018-09-28 10:14:37,023 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:37,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:14:37,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:37,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:37,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:37,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:37,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:37,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:37,063 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:37,174 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:14:37,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:37,174 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:37,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:37,175 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:14:37,175 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:14:37,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:37,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:14:37,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2018-09-28 10:14:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:14:37,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:14:37,192 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-28 10:14:37,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:37,192 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:14:37,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:14:37,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:37,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:37,193 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:37,193 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:37,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:37,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1656247501, now seen corresponding path program 34 times [2018-09-28 10:14:37,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:37,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:37,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:37,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:37,344 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:37,345 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 [2018-09-28 10:14:37,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:37,357 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:37,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:37,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:37,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:37,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:37,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:37,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:37,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:37,380 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-28 10:14:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:37,419 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:14:37,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:37,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:37,420 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:14:37,420 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:14:37,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:14:37,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-09-28 10:14:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:37,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:37,436 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:37,436 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:37,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:37,436 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:37,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:37,437 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:37,437 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:37,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:37,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1656245579, now seen corresponding path program 35 times [2018-09-28 10:14:37,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:37,437 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:37,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:37,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:37,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:37,500 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 [2018-09-28 10:14:37,507 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:37,515 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:14:37,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:37,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:37,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:37,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:37,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:37,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:37,541 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:37,582 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:14:37,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:37,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:37,583 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:14:37,583 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:14:37,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:14:37,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2018-09-28 10:14:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:37,596 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:14:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:37,596 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:37,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:37,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:37,597 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:37,597 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:37,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1654400459, now seen corresponding path program 36 times [2018-09-28 10:14:37,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:37,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:37,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:37,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,652 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:37,652 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 [2018-09-28 10:14:37,660 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:37,666 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-28 10:14:37,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:37,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:37,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:37,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:37,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:37,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:37,700 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:14:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:37,767 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2018-09-28 10:14:37,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:37,767 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:37,768 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:14:37,768 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:14:37,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:37,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:14:37,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2018-09-28 10:14:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:37,783 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:37,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:37,783 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:37,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:37,783 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:37,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:37,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:37,784 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:14:37,784 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:37,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:37,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1654398537, now seen corresponding path program 37 times [2018-09-28 10:14:37,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:37,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:37,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:37,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:37,834 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 [2018-09-28 10:14:37,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:37,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:37,872 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:37,872 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:37,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:37,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:37,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:37,873 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:37,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:37,931 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2018-09-28 10:14:37,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:37,931 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:37,932 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:14:37,932 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:14:37,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:37,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:14:37,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2018-09-28 10:14:37,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:14:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:14:37,945 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-28 10:14:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:37,945 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:14:37,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:14:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:37,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:37,946 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:14:37,946 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:37,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash 884718641, now seen corresponding path program 38 times [2018-09-28 10:14:37,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:37,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:37,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:37,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:38,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:38,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:38,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:38,026 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:38,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:38,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:38,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:38,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:38,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:38,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:38,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:38,054 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 8 states. [2018-09-28 10:14:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:38,152 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:14:38,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:38,152 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:38,153 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:14:38,153 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:14:38,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:14:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-28 10:14:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:38,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:38,173 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:14:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:38,174 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:38,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:38,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:38,174 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:38,174 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:38,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:38,174 INFO L82 PathProgramCache]: Analyzing trace with hash 884720563, now seen corresponding path program 39 times [2018-09-28 10:14:38,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:38,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:38,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:38,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:38,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:38,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:38,218 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 [2018-09-28 10:14:38,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:38,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:14:38,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:38,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:38,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:38,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:38,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:38,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:38,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:38,260 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:14:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:38,431 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:14:38,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:38,431 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:38,432 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:14:38,432 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:14:38,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:38,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:14:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-28 10:14:38,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:38,452 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:38,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:38,452 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:38,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:38,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:38,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:38,452 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:38,453 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:38,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash 886565683, now seen corresponding path program 40 times [2018-09-28 10:14:38,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:38,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:38,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:38,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:38,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:38,501 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:38,501 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:38,501 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 [2018-09-28 10:14:38,508 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:38,513 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:38,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:38,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:38,537 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:38,537 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:38,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:38,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:38,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:38,538 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:38,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:38,594 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:14:38,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:38,594 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:38,595 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:14:38,595 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:14:38,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:38,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:14:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-28 10:14:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:38,614 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:14:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:38,614 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:38,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:38,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:38,615 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:38,615 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:38,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash 886567605, now seen corresponding path program 41 times [2018-09-28 10:14:38,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:38,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:38,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:38,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:38,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:38,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:38,755 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 [2018-09-28 10:14:38,764 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:38,774 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:14:38,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:38,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:38,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:38,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:38,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:38,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:38,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:38,797 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:14:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:38,845 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:14:38,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:38,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:38,845 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:14:38,845 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:14:38,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:38,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:14:38,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 20. [2018-09-28 10:14:38,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:38,862 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:14:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:38,862 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:38,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:38,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:38,862 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:38,863 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:38,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:38,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1635241293, now seen corresponding path program 42 times [2018-09-28 10:14:38,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:38,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:38,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:38,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:38,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:38,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:38,905 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 [2018-09-28 10:14:38,913 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:38,919 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-28 10:14:38,920 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:38,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:38,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:38,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:38,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:38,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:38,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:38,944 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:14:39,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:39,103 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:14:39,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:39,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:39,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:39,103 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:14:39,103 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:14:39,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:14:39,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-28 10:14:39,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:39,124 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:14:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:39,124 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:39,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:39,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:39,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:39,124 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:39,125 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:39,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:39,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1635239371, now seen corresponding path program 43 times [2018-09-28 10:14:39,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:39,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:39,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:39,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:39,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:39,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:39,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:39,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:39,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:39,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:39,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:39,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:39,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:39,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:39,214 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:14:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:39,279 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:14:39,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:39,279 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:39,279 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:14:39,279 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:14:39,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:39,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:14:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-28 10:14:39,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:39,297 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:39,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:39,297 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:39,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:39,297 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:39,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:39,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:39,298 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:39,298 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:39,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:39,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1633394251, now seen corresponding path program 44 times [2018-09-28 10:14:39,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:39,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:39,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:39,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:39,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:39,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:39,355 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 [2018-09-28 10:14:39,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:39,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:39,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:39,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:39,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:39,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:39,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:39,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:39,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:39,391 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:39,482 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:14:39,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:39,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:39,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:39,482 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:14:39,482 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:14:39,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:14:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-28 10:14:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:39,503 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:14:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:39,503 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:39,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:39,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:39,503 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:14:39,504 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:39,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:39,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1633392329, now seen corresponding path program 45 times [2018-09-28 10:14:39,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:39,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:39,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:39,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:39,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:39,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:39,545 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 [2018-09-28 10:14:39,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:39,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:14:39,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:39,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:39,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:39,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:39,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:39,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:39,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:39,583 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:14:39,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:39,649 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:14:39,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:39,650 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:39,650 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:14:39,650 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:14:39,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:39,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:14:39,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 18. [2018-09-28 10:14:39,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:14:39,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:14:39,669 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 13 [2018-09-28 10:14:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:39,669 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:14:39,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:39,670 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:14:39,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:39,670 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:39,670 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:39,670 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:39,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:39,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1564777011, now seen corresponding path program 46 times [2018-09-28 10:14:39,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:39,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:39,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:39,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:39,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:39,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:39,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:39,736 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 [2018-09-28 10:14:39,744 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:39,752 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:39,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:39,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:39,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:39,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:39,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:39,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:39,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:39,776 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 8 states. [2018-09-28 10:14:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:39,832 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:14:39,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:39,832 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:39,833 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:14:39,833 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:14:39,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:39,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:14:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-28 10:14:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:39,857 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:14:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:39,857 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:39,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:39,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:39,858 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:39,858 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:39,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:39,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1564778933, now seen corresponding path program 47 times [2018-09-28 10:14:39,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:39,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:39,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:39,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:39,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:39,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:39,906 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:39,906 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 [2018-09-28 10:14:39,914 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:39,921 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:14:39,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:39,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:39,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:39,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:39,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:39,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:39,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:39,946 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:14:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:40,022 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:14:40,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:40,022 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:40,022 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:14:40,022 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:14:40,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:14:40,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2018-09-28 10:14:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:40,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:40,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:40,051 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:40,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:40,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:40,052 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:40,052 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:40,052 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:40,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1566624053, now seen corresponding path program 48 times [2018-09-28 10:14:40,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:40,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:40,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:40,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:40,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:40,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:40,143 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:40,148 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-09-28 10:14:40,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:40,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:40,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:40,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:40,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:40,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:40,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:40,178 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:40,251 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:14:40,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:40,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:40,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:40,253 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:14:40,254 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:14:40,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:40,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:14:40,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-28 10:14:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:40,277 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:14:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:40,277 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:40,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:40,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:40,278 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:14:40,278 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:40,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:40,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1566625975, now seen corresponding path program 49 times [2018-09-28 10:14:40,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:40,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:40,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:40,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:40,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:40,361 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 [2018-09-28 10:14:40,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:40,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:40,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:40,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:40,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:40,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:40,408 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:14:40,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:40,528 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:14:40,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:40,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:40,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:40,528 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:14:40,529 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:14:40,529 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:40,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:14:40,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2018-09-28 10:14:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:40,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:40,550 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 13 [2018-09-28 10:14:40,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:40,551 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:40,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:40,551 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:40,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:40,551 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1] [2018-09-28 10:14:40,551 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:40,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:40,552 INFO L82 PathProgramCache]: Analyzing trace with hash -955182923, now seen corresponding path program 50 times [2018-09-28 10:14:40,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:40,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:40,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:40,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:40,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:40,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:40,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:40,606 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:40,612 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:40,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:40,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:40,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:40,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:40,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:40,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:40,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:40,638 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 8 states. [2018-09-28 10:14:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:40,708 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:14:40,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:40,709 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:40,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:40,709 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:14:40,709 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:14:40,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:14:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2018-09-28 10:14:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:40,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:40,735 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:14:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:40,736 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:40,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:40,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:40,736 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:14:40,736 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:40,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:40,737 INFO L82 PathProgramCache]: Analyzing trace with hash -955181001, now seen corresponding path program 51 times [2018-09-28 10:14:40,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:40,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:40,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:40,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:40,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:40,786 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 [2018-09-28 10:14:40,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:40,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:14:40,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:40,805 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:40,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:40,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:40,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:40,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:40,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:40,828 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:14:40,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:40,889 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:14:40,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:40,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:40,890 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:14:40,890 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:14:40,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:40,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:14:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-09-28 10:14:40,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:40,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:40,916 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 13 [2018-09-28 10:14:40,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:40,916 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:40,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:40,916 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:40,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:40,916 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2018-09-28 10:14:40,917 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:40,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:40,917 INFO L82 PathProgramCache]: Analyzing trace with hash -953335881, now seen corresponding path program 52 times [2018-09-28 10:14:40,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:40,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:40,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:40,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:41,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:41,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:41,025 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:41,030 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:41,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:41,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:41,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:41,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:41,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:41,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:41,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:41,054 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 8 states. [2018-09-28 10:14:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:41,108 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2018-09-28 10:14:41,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:41,108 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:41,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:41,108 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:14:41,108 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:14:41,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:14:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-09-28 10:14:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:41,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 13 [2018-09-28 10:14:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:41,132 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:41,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:14:41,132 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:41,132 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1] [2018-09-28 10:14:41,133 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:41,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash -953333959, now seen corresponding path program 5 times [2018-09-28 10:14:41,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:41,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:41,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:41,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:41,187 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:41,187 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 [2018-09-28 10:14:41,196 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:41,202 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-28 10:14:41,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:41,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:41,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:41,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:14:41,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:14:41,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:14:41,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:41,236 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 8 states. [2018-09-28 10:14:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:41,337 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2018-09-28 10:14:41,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:14:41,338 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-09-28 10:14:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:41,338 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:14:41,338 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:14:41,338 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-28 10:14:41,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:14:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2018-09-28 10:14:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:14:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-09-28 10:14:41,356 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 13 [2018-09-28 10:14:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:41,356 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-09-28 10:14:41,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:14:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2018-09-28 10:14:41,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:41,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:41,356 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-28 10:14:41,357 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:41,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash 397590258, now seen corresponding path program 6 times [2018-09-28 10:14:41,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:41,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:41,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:41,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:41,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:41,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-28 10:14:41,421 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:41,428 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:14:41,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:41,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:41,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:41,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:41,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:41,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:41,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:41,454 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand 9 states. [2018-09-28 10:14:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:41,543 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:14:41,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:41,543 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:41,544 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:14:41,544 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:14:41,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:14:41,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:14:41,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:41,578 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:41,578 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:41,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:41,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:41,579 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:14:41,579 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:41,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:41,579 INFO L82 PathProgramCache]: Analyzing trace with hash 397592180, now seen corresponding path program 53 times [2018-09-28 10:14:41,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:41,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:41,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:41,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:41,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:41,690 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 [2018-09-28 10:14:41,699 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:41,708 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:14:41,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:41,709 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:41,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:41,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:41,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:41,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:41,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:41,732 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:41,832 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:14:41,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:41,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:41,832 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:14:41,832 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:14:41,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:14:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:14:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:41,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:41,861 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:14:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:41,862 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:41,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:41,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:41,862 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:14:41,862 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:41,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:41,863 INFO L82 PathProgramCache]: Analyzing trace with hash 399437300, now seen corresponding path program 54 times [2018-09-28 10:14:41,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:41,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:41,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:41,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:41,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:41,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:41,970 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:41,977 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:14:41,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:41,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:41,983 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:42,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:42,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:42,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:42,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:42,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:42,003 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:14:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:42,201 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:14:42,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:42,201 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:42,202 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:14:42,202 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:14:42,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:14:42,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:14:42,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:42,233 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:42,234 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:42,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:42,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:42,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:42,234 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:42,234 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:42,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:42,235 INFO L82 PathProgramCache]: Analyzing trace with hash 399439222, now seen corresponding path program 55 times [2018-09-28 10:14:42,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:42,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:42,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:42,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:42,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:42,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:42,499 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 [2018-09-28 10:14:42,510 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:42,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:42,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:42,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:42,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:42,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:42,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:42,539 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:42,616 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:14:42,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:42,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:42,616 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:14:42,616 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:14:42,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:14:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-28 10:14:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:42,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:42,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:14:42,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:42,645 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:42,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:42,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:42,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:42,646 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:14:42,646 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:42,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:42,646 INFO L82 PathProgramCache]: Analyzing trace with hash -2122369676, now seen corresponding path program 56 times [2018-09-28 10:14:42,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:42,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:42,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:42,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:42,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:42,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:42,709 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 [2018-09-28 10:14:42,717 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:42,724 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:42,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:42,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:42,728 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:42,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:42,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:42,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:42,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:42,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:42,748 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:14:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:42,841 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:14:42,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:42,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:42,842 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:14:42,842 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:14:42,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:42,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:14:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:14:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:42,877 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:42,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:42,878 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:42,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:42,878 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:42,878 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:42,878 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:42,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:42,879 INFO L82 PathProgramCache]: Analyzing trace with hash -2122367754, now seen corresponding path program 57 times [2018-09-28 10:14:42,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:42,879 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:42,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:42,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:42,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:42,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:42,941 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 [2018-09-28 10:14:42,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:42,959 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:14:42,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:42,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:42,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:42,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:42,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:42,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:42,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:42,984 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:43,077 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:14:43,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:43,078 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:43,079 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:14:43,079 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:14:43,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:14:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:14:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:43,112 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:14:43,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:43,112 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:43,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:43,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:43,112 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:43,112 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:43,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:43,113 INFO L82 PathProgramCache]: Analyzing trace with hash -2120522634, now seen corresponding path program 58 times [2018-09-28 10:14:43,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:43,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:43,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:43,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:43,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:43,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:43,229 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 [2018-09-28 10:14:43,238 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:43,268 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:43,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:43,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:43,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:43,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:43,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:43,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:43,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:43,302 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:14:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:43,399 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:14:43,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:43,399 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:43,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:43,400 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:14:43,400 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:14:43,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:14:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:14:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:43,433 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:43,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:43,434 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:43,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:43,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:43,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:43,434 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:43,434 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:43,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:43,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2120520712, now seen corresponding path program 59 times [2018-09-28 10:14:43,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:43,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:43,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:43,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:43,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:43,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:43,920 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 [2018-09-28 10:14:43,928 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:43,943 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:14:43,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:43,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:43,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:43,967 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:43,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:43,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:43,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:43,967 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:44,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:44,050 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:14:44,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:44,050 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:44,050 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:14:44,050 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:14:44,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:44,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:14:44,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-28 10:14:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:44,078 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-28 10:14:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:44,078 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:44,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:44,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:44,078 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:14:44,079 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:44,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:44,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1077648628, now seen corresponding path program 60 times [2018-09-28 10:14:44,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:44,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:44,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:44,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:44,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:44,132 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 [2018-09-28 10:14:44,140 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:44,148 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:14:44,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:44,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:44,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:44,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:44,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:44,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:44,177 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-28 10:14:44,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:44,275 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:14:44,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:44,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:44,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:44,276 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:14:44,276 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:14:44,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:14:44,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-28 10:14:44,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:44,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:44,312 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:44,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:44,312 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:44,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:44,312 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:44,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:44,313 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:44,313 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:44,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:44,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650550, now seen corresponding path program 61 times [2018-09-28 10:14:44,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:44,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:44,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:44,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:44,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,394 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:44,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:44,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:44,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:44,416 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:44,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:44,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:44,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:44,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:44,442 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:44,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:44,537 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:14:44,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:44,537 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:44,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:44,538 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:14:44,538 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:14:44,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:44,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:14:44,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-28 10:14:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:44,573 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:14:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:44,573 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:44,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:44,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:44,573 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:44,574 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:44,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:44,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1079495670, now seen corresponding path program 62 times [2018-09-28 10:14:44,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:44,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:44,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:44,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:44,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:44,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:44,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:44,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:44,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:44,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:44,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:44,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:44,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:44,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:44,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:44,687 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:14:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:44,783 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:14:44,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:44,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:44,783 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:14:44,783 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:14:44,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:44,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:14:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-28 10:14:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:44,819 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:44,819 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:44,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:44,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:44,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:44,820 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:44,820 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:44,820 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:44,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1079497592, now seen corresponding path program 63 times [2018-09-28 10:14:44,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:44,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:44,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:44,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:44,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:44,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:44,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:44,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:14:44,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:44,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:44,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:44,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:44,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:44,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:44,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:44,919 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:45,011 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:14:45,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:45,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:45,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:45,012 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:14:45,012 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:14:45,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:45,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:14:45,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-28 10:14:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:45,047 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:14:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:45,047 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:45,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:45,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:45,048 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:45,048 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:45,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:45,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1442311306, now seen corresponding path program 64 times [2018-09-28 10:14:45,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:45,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:45,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:45,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:45,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:45,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:45,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:45,128 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:45,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:45,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:45,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:45,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:45,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:45,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:45,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:45,153 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:14:45,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:45,239 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:14:45,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:45,239 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:45,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:45,240 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:14:45,240 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:14:45,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:14:45,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-28 10:14:45,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:45,284 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:45,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:45,284 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:45,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:45,284 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:45,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:45,285 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:45,285 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:45,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:45,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1442309384, now seen corresponding path program 65 times [2018-09-28 10:14:45,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:45,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:45,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:45,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:45,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:45,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:45,367 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:45,376 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:14:45,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:45,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:45,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:45,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:45,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:45,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:45,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:45,401 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:45,496 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:14:45,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:45,497 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:45,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:45,497 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:14:45,497 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:14:45,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:45,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:14:45,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-28 10:14:45,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:45,533 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:14:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:45,533 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:45,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:45,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:45,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:45,533 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:45,533 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:45,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:45,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1440464264, now seen corresponding path program 66 times [2018-09-28 10:14:45,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:45,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:45,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:45,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:45,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:45,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:45,784 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:45,791 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:14:45,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:45,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:45,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:45,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:45,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:45,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:45,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:45,816 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:14:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:45,878 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:14:45,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:45,878 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:45,879 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:14:45,879 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:14:45,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:14:45,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-28 10:14:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:45,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:45,917 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:45,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:45,917 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:45,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:45,917 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:45,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:45,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:45,918 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:45,918 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:45,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:45,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1440462342, now seen corresponding path program 67 times [2018-09-28 10:14:45,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:45,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:45,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:45,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:45,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:45,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:45,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:45,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:45,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:46,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:46,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:46,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:46,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:46,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:46,017 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:46,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:46,081 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-28 10:14:46,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:46,081 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:46,082 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:14:46,082 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:14:46,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:46,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:14:46,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-28 10:14:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:14:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:14:46,106 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-28 10:14:46,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:46,106 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:14:46,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:14:46,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:46,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:46,106 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:14:46,107 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:46,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:46,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1098654836, now seen corresponding path program 68 times [2018-09-28 10:14:46,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:46,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:46,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:46,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:46,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:46,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:46,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:46,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:46,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:46,191 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:46,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:46,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:46,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:46,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:46,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:46,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:46,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:46,216 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-28 10:14:46,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:46,323 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:14:46,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:46,323 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:46,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:46,323 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:14:46,323 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:14:46,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:14:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:14:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:46,366 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:46,366 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:46,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:46,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:46,367 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:46,367 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:46,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:46,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1098656758, now seen corresponding path program 69 times [2018-09-28 10:14:46,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:46,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:46,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:46,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:46,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:46,420 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:46,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:46,428 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:46,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:14:46,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:46,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:46,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:46,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:46,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:46,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:46,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:46,461 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:46,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:46,576 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:14:46,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:46,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:46,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:46,577 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:14:46,577 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:14:46,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:14:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:14:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:46,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:46,620 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:14:46,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:46,620 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:46,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:46,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:46,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:46,620 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:46,620 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:46,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:46,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1100501878, now seen corresponding path program 70 times [2018-09-28 10:14:46,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:46,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:46,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:46,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:46,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:46,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:46,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:46,683 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:46,690 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:46,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:46,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:46,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:46,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:46,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:46,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:46,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:46,712 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:14:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:46,814 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:14:46,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:46,814 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:46,815 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:14:46,815 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:14:46,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:14:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:14:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:46,858 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:46,858 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:46,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:46,858 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:46,858 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:46,858 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:46,859 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:46,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:46,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1100503800, now seen corresponding path program 71 times [2018-09-28 10:14:46,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:46,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:46,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:46,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:46,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:46,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:46,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:46,947 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:46,957 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:14:46,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:46,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:46,960 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:46,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:46,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:46,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:46,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:46,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:46,980 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:47,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:47,102 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:14:47,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:47,102 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:47,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:47,102 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:14:47,102 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:14:47,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:14:47,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 22. [2018-09-28 10:14:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:47,136 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:14:47,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:47,137 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:47,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:47,137 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:47,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:47,137 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:47,137 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:47,137 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:47,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1421305098, now seen corresponding path program 72 times [2018-09-28 10:14:47,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:47,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:47,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:47,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:47,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:47,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:47,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:47,222 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:47,231 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:14:47,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:47,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:47,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:47,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:47,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:47,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:47,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:47,254 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:14:47,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:47,397 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:14:47,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:47,397 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:47,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:47,398 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:14:47,398 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:14:47,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:47,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:14:47,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:14:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:47,445 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:47,445 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:47,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:47,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:47,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:47,445 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:47,445 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:47,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:47,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1421303176, now seen corresponding path program 73 times [2018-09-28 10:14:47,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:47,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:47,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:47,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:47,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:47,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:47,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:47,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:47,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:47,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:47,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:47,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:47,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:47,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:47,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:47,576 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:47,687 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:14:47,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:47,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:47,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:47,688 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:14:47,688 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:14:47,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:14:47,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:14:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:47,730 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:14:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:47,731 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:47,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:47,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:47,731 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:47,732 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:47,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1419458056, now seen corresponding path program 74 times [2018-09-28 10:14:47,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:47,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:47,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:47,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:47,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:47,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:47,815 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:47,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:47,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:47,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:47,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:47,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:47,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:47,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:47,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:47,864 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:14:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:47,972 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:14:47,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:47,972 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:47,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:47,973 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:14:47,973 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:14:47,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:14:48,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:14:48,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:48,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:48,019 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:48,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:48,019 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:48,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:48,019 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:48,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:48,020 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:48,020 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:48,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:48,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1419456134, now seen corresponding path program 75 times [2018-09-28 10:14:48,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:48,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:48,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:48,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:48,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:48,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:48,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:48,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:48,088 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:14:48,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:48,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:48,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:48,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:48,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:48,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:48,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:48,113 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:48,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:48,217 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:14:48,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:48,218 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:48,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:48,218 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:14:48,218 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:14:48,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:48,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:14:48,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2018-09-28 10:14:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:48,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:48,253 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-28 10:14:48,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:48,253 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:48,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:48,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:48,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:48,254 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:48,254 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:48,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:48,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1778713206, now seen corresponding path program 76 times [2018-09-28 10:14:48,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:48,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:48,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:48,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:48,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:48,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:48,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:48,312 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:48,317 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:48,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:48,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:48,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:48,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:48,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:48,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:48,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:48,342 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-28 10:14:48,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:48,442 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:14:48,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:48,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:48,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:48,443 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:14:48,443 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:14:48,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:48,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:14:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-28 10:14:48,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:48,492 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:48,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:48,492 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:48,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:48,492 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:48,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:48,493 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:48,493 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:48,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:48,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1778715128, now seen corresponding path program 77 times [2018-09-28 10:14:48,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:48,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:48,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:48,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:48,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:48,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:48,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:48,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:48,556 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:48,567 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:14:48,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:48,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:48,570 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:48,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:48,589 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:48,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:48,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:48,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:48,590 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:48,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:48,688 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:14:48,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:48,688 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:48,689 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:14:48,689 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:14:48,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:14:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2018-09-28 10:14:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:48,739 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:14:48,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:48,739 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:48,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:48,739 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:48,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:48,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:48,740 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:48,740 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:48,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:48,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1780560248, now seen corresponding path program 78 times [2018-09-28 10:14:48,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:48,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:48,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:48,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:48,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:48,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:48,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:48,848 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:48,856 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:14:48,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:48,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:48,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:48,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:48,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:48,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:48,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:48,882 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:14:48,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:48,997 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:14:48,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:48,997 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:48,998 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:14:48,998 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:14:48,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:14:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-28 10:14:49,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:49,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:49,054 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:49,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:49,054 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:49,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:49,054 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:49,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:49,055 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:49,055 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:49,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1780562170, now seen corresponding path program 79 times [2018-09-28 10:14:49,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:49,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:49,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:49,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:49,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:49,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:49,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:49,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:49,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:49,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:49,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:49,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:49,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:49,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:49,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:49,161 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:49,271 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:14:49,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:49,271 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:49,272 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:14:49,272 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:14:49,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:14:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 22. [2018-09-28 10:14:49,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:49,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:49,314 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:14:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:49,315 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:49,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:49,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:49,315 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:49,315 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:49,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:49,316 INFO L82 PathProgramCache]: Analyzing trace with hash -741246728, now seen corresponding path program 80 times [2018-09-28 10:14:49,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:49,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:49,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:49,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:49,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:49,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:49,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:49,528 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:49,534 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:49,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:49,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:49,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:49,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:49,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:49,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:49,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:49,559 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:14:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:49,647 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:14:49,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:49,647 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:49,648 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:14:49,648 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:14:49,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:49,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:14:49,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-09-28 10:14:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:49,691 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:49,692 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:49,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:49,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:49,692 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:49,693 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:49,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:49,693 INFO L82 PathProgramCache]: Analyzing trace with hash -741244806, now seen corresponding path program 81 times [2018-09-28 10:14:49,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:49,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:49,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:49,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:49,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:49,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:49,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:49,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:49,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:14:49,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:49,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:49,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:49,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:49,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:49,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:49,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:49,932 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:50,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:50,018 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:14:50,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:50,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:50,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:50,018 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:14:50,018 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:14:50,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:50,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:14:50,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2018-09-28 10:14:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:50,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:50,060 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:14:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:50,060 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:50,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:50,060 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:50,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:50,061 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:50,061 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:50,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:50,061 INFO L82 PathProgramCache]: Analyzing trace with hash -739399686, now seen corresponding path program 82 times [2018-09-28 10:14:50,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:50,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:50,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:50,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:50,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:50,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:50,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:50,130 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:50,136 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:50,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:50,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:50,159 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:50,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:50,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:50,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:50,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:50,160 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:14:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:50,246 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2018-09-28 10:14:50,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:50,246 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:50,247 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:14:50,247 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:14:50,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:14:50,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-09-28 10:14:50,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:50,298 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:50,298 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:50,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:50,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:50,298 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:14:50,298 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:50,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:50,299 INFO L82 PathProgramCache]: Analyzing trace with hash -739397764, now seen corresponding path program 83 times [2018-09-28 10:14:50,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:50,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:50,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:50,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:50,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:50,353 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:50,353 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:50,361 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:50,369 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:14:50,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:50,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:50,393 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:50,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:50,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:50,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:50,394 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:50,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:50,489 INFO L93 Difference]: Finished difference Result 30 states and 42 transitions. [2018-09-28 10:14:50,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:50,489 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:50,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:50,489 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:14:50,489 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:14:50,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:50,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:14:50,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2018-09-28 10:14:50,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:14:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:14:50,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-28 10:14:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:50,522 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:14:50,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:50,522 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:14:50,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:50,522 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:50,522 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:14:50,522 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:50,523 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:50,523 INFO L82 PathProgramCache]: Analyzing trace with hash -189215756, now seen corresponding path program 84 times [2018-09-28 10:14:50,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:50,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:50,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:50,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:50,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:50,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:50,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:50,688 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:50,699 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:14:50,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:50,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:50,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:50,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:50,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:50,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:50,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:50,724 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 9 states. [2018-09-28 10:14:50,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:50,869 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:14:50,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:50,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:50,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:50,870 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:14:50,870 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:14:50,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:14:50,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:14:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:14:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:14:50,924 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:14:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:50,925 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:14:50,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:14:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:50,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:50,925 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:50,925 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:50,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:50,926 INFO L82 PathProgramCache]: Analyzing trace with hash -189213834, now seen corresponding path program 85 times [2018-09-28 10:14:50,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:50,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:50,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:50,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:50,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:50,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:50,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:50,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:50,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:51,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:51,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:51,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:51,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:51,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:51,018 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:14:51,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:51,148 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:14:51,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:51,148 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:51,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:51,148 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:14:51,148 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:14:51,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:51,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:14:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-28 10:14:51,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:51,202 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:51,202 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:51,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:51,202 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:51,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:51,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:51,202 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:51,202 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:51,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:51,203 INFO L82 PathProgramCache]: Analyzing trace with hash -187368714, now seen corresponding path program 86 times [2018-09-28 10:14:51,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:51,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:51,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:51,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:51,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:51,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:51,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:51,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:51,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:51,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:51,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:51,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:51,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:51,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:51,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:51,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:51,350 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:51,516 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:14:51,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:51,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:51,517 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:14:51,517 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:14:51,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:14:51,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:14:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:14:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:14:51,571 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:14:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:51,571 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:14:51,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:51,571 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:14:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:51,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:51,572 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:51,572 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:51,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:51,572 INFO L82 PathProgramCache]: Analyzing trace with hash -187366792, now seen corresponding path program 87 times [2018-09-28 10:14:51,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:51,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:51,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:51,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:51,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:51,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:51,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:51,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:51,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:14:51,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:51,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:51,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:51,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:51,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:51,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:51,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:51,686 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:14:51,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:51,886 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:14:51,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:51,886 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:51,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:51,887 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:14:51,887 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:14:51,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:51,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:14:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-28 10:14:51,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:51,968 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:14:51,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:51,968 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:51,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:51,969 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:51,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:51,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:51,969 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:51,969 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:51,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:51,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1585791606, now seen corresponding path program 88 times [2018-09-28 10:14:51,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:51,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:51,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:51,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:51,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:52,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:52,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:52,776 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:52,806 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:52,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:52,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:52,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:52,846 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:52,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:52,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:52,846 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:14:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:53,334 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:14:53,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:53,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:53,335 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:14:53,335 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:14:53,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:14:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:14:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:14:53,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:14:53,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:14:53,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:53,392 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:14:53,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:53,392 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:14:53,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:53,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:53,393 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:53,393 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:53,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:53,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1585793528, now seen corresponding path program 89 times [2018-09-28 10:14:53,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:53,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:53,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:53,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:53,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:53,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:53,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:53,469 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:53,476 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:14:53,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:53,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:53,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:53,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:53,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:53,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:53,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:53,500 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:14:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:53,660 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:14:53,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:53,660 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:53,661 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:14:53,661 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:14:53,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:14:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-28 10:14:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:53,717 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:53,718 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:53,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:53,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:53,718 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:53,718 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:53,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:53,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1587638648, now seen corresponding path program 90 times [2018-09-28 10:14:53,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:53,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:53,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:53,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:53,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:53,807 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:53,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:53,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:53,814 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:53,821 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:14:53,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:53,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:53,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:53,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:53,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:53,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:53,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:53,846 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:53,995 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:14:53,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:53,995 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:53,996 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:14:53,996 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:14:53,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:53,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:14:54,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-28 10:14:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:14:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:14:54,063 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:14:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:54,063 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:14:54,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:14:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:54,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:54,064 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:54,064 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:54,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:54,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1587640570, now seen corresponding path program 91 times [2018-09-28 10:14:54,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:54,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:54,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:54,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:54,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:54,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:54,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:54,144 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:54,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:54,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:54,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:54,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:54,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:54,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:54,174 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:14:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:54,315 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:14:54,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:54,315 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:54,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:54,315 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:14:54,315 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:14:54,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:14:54,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 22. [2018-09-28 10:14:54,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:14:54,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:14:54,359 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:14:54,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:54,360 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:14:54,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:54,360 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:14:54,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:54,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:54,360 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:54,360 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:54,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash 490842614, now seen corresponding path program 92 times [2018-09-28 10:14:54,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:54,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:54,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:54,361 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:54,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:54,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:54,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:54,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:54,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:54,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:54,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:54,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:54,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:54,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:54,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:54,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:54,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:54,513 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:14:54,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:54,664 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:14:54,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:54,664 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:54,664 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:14:54,664 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:14:54,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:54,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:14:54,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:14:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:14:54,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:14:54,727 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:14:54,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:54,727 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:14:54,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:54,727 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:14:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:54,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:54,727 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:54,728 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:54,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash 490844536, now seen corresponding path program 93 times [2018-09-28 10:14:54,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:54,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:54,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:54,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:54,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:54,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:54,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:54,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:54,797 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:14:54,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:54,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:54,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:54,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:54,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:54,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:54,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:54,823 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:14:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:55,042 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:14:55,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:55,042 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:55,043 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:14:55,043 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:14:55,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:14:55,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-28 10:14:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:55,141 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:55,142 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:55,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:55,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:55,142 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:55,142 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:55,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:55,143 INFO L82 PathProgramCache]: Analyzing trace with hash 492689656, now seen corresponding path program 94 times [2018-09-28 10:14:55,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:55,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:55,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:55,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:55,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:55,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:55,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:55,376 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:55,380 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:55,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:55,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:55,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:55,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:55,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:55,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:55,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:55,404 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:55,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:55,550 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:14:55,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:55,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:55,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:55,551 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:14:55,551 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:14:55,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:55,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:14:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:14:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:14:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:14:55,612 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:14:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:55,612 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:14:55,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:55,612 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:14:55,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:55,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:55,612 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:55,613 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:55,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:55,613 INFO L82 PathProgramCache]: Analyzing trace with hash 492691578, now seen corresponding path program 95 times [2018-09-28 10:14:55,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:55,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:55,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:55,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:55,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:55,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:55,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:55,761 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:55,769 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:14:55,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:55,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:55,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:55,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:55,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:55,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:55,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:55,793 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:14:55,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:55,930 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:14:55,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:55,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:55,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:55,931 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:14:55,931 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:14:55,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:14:55,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-28 10:14:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:55,982 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:14:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:55,982 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:55,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:55,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:55,983 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:55,983 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:55,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:55,983 INFO L82 PathProgramCache]: Analyzing trace with hash -2029117320, now seen corresponding path program 96 times [2018-09-28 10:14:55,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:55,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:55,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:55,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:55,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:56,041 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:56,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:56,051 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:56,063 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:14:56,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:56,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:56,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:56,085 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:56,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:56,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:56,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:56,086 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:14:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:56,219 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:14:56,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:56,219 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:56,219 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:14:56,219 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:14:56,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:56,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:14:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:14:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:14:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:14:56,279 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:14:56,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:56,280 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:14:56,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:14:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:56,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:56,280 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:56,280 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:56,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:56,280 INFO L82 PathProgramCache]: Analyzing trace with hash -2029115398, now seen corresponding path program 97 times [2018-09-28 10:14:56,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:56,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:56,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:56,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:56,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:57,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:57,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:57,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:57,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:57,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:57,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:57,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:57,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:57,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:57,152 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:14:57,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:57,298 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:14:57,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:57,298 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:57,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:57,298 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:14:57,298 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:14:57,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:14:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-28 10:14:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:57,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:57,358 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:57,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:57,358 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:57,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:57,359 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:57,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:57,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:57,359 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:57,359 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:57,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:57,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2027270278, now seen corresponding path program 98 times [2018-09-28 10:14:57,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:57,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:57,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:57,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:57,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:57,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:57,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:57,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:57,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:57,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:57,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:57,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:57,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:57,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:57,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:57,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:57,495 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:57,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:57,645 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:14:57,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:57,645 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:57,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:57,646 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:14:57,646 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:14:57,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:14:57,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-28 10:14:57,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:14:57,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:14:57,709 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:14:57,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:57,709 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:14:57,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:57,709 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:14:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:57,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:57,709 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:14:57,709 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:57,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:57,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2027268356, now seen corresponding path program 99 times [2018-09-28 10:14:57,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:57,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:57,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:57,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:57,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:57,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:57,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:57,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:57,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:14:57,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:57,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:57,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:57,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:57,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:57,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:57,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:57,828 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:14:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:57,968 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:14:57,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:57,968 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:57,969 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:14:57,969 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:14:57,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:14:58,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2018-09-28 10:14:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:14:58,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:14:58,013 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 15 [2018-09-28 10:14:58,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:58,013 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:14:58,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:58,013 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:14:58,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:58,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:58,013 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:58,013 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:58,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:58,014 INFO L82 PathProgramCache]: Analyzing trace with hash 511848822, now seen corresponding path program 100 times [2018-09-28 10:14:58,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:58,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:58,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:58,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:58,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:58,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:58,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:58,076 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:14:58,082 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:14:58,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:58,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:58,106 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:58,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:58,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:58,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:58,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:58,107 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 9 states. [2018-09-28 10:14:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:58,311 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:14:58,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:58,311 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:58,311 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:14:58,311 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:14:58,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:14:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-28 10:14:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:14:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:14:58,380 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:14:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:58,380 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:14:58,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:14:58,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:58,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:58,380 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:58,380 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:58,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash 511850744, now seen corresponding path program 101 times [2018-09-28 10:14:58,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:58,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:58,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:58,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:58,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:58,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:58,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:58,445 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:14:58,453 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:14:58,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:58,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:58,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:58,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:58,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:58,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:58,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:58,479 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:14:58,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:58,651 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:14:58,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:58,651 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:58,652 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:14:58,652 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:14:58,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:58,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:14:58,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-28 10:14:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:14:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:14:58,728 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:14:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:58,728 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:14:58,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:14:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:58,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:58,728 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:58,728 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:58,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:58,729 INFO L82 PathProgramCache]: Analyzing trace with hash 513695864, now seen corresponding path program 102 times [2018-09-28 10:14:58,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:58,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:58,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:58,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:58,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:58,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:58,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:58,791 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:14:58,799 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:14:58,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:58,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:58,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:58,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:58,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:58,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:58,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:58,824 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:14:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:58,977 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:14:58,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:58,977 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:58,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:58,978 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:14:58,978 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:14:58,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:14:59,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-28 10:14:59,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:14:59,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:14:59,056 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:14:59,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:59,056 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:14:59,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:59,056 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:14:59,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:59,056 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:59,056 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:59,056 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:59,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:59,057 INFO L82 PathProgramCache]: Analyzing trace with hash 513697786, now seen corresponding path program 103 times [2018-09-28 10:14:59,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:59,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:59,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:59,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:59,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:59,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:59,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:59,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:59,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:59,129 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:59,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:59,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:59,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:59,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:59,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:59,151 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:14:59,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:59,298 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:14:59,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:59,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:59,301 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:14:59,302 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:14:59,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:14:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2018-09-28 10:14:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:14:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:14:59,363 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:14:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:59,364 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:14:59,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:14:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:59,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:59,364 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:14:59,364 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:59,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:59,364 INFO L82 PathProgramCache]: Analyzing trace with hash -2008111112, now seen corresponding path program 104 times [2018-09-28 10:14:59,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:59,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:59,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:59,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:14:59,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:59,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:59,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:59,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:59,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:14:59,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:14:59,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:59,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:59,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:59,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:59,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:59,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:59,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:59,455 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:14:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:59,628 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:14:59,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:59,628 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:59,629 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:14:59,629 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:14:59,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:59,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:14:59,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-28 10:14:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:14:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:14:59,695 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:14:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:14:59,696 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:14:59,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:14:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:14:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:14:59,696 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:14:59,696 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:14:59,696 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:14:59,696 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:14:59,696 INFO L82 PathProgramCache]: Analyzing trace with hash -2008109190, now seen corresponding path program 105 times [2018-09-28 10:14:59,696 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:14:59,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:14:59,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:59,697 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:14:59,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:14:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:14:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:59,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:14:59,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:14:59,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:14:59,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:14:59,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:14:59,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:14:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:14:59,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:14:59,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:14:59,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:14:59,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:14:59,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:59,792 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:14:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:14:59,958 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:14:59,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:14:59,958 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:14:59,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:14:59,959 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:14:59,959 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:14:59,959 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:14:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:15:00,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-28 10:15:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:00,027 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:15:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:00,028 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:00,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:00,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:00,028 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:15:00,028 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:00,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:00,028 INFO L82 PathProgramCache]: Analyzing trace with hash -2006264070, now seen corresponding path program 106 times [2018-09-28 10:15:00,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:00,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:00,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:00,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:00,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:00,098 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:00,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:00,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:00,106 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:00,111 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:00,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:00,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:00,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:00,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:15:00,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:15:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:15:00,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:00,137 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:15:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:00,283 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:15:00,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:00,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:15:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:00,284 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:15:00,284 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:15:00,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:15:00,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-28 10:15:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:00,351 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:15:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:00,351 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:00,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:00,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:00,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:00,352 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:15:00,352 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:00,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:00,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2006262148, now seen corresponding path program 107 times [2018-09-28 10:15:00,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:00,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:00,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:00,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:00,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:00,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:00,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:00,420 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:00,457 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:15:00,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:00,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:00,460 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:00,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:00,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:15:00,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:15:00,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:15:00,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:00,492 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:15:01,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:01,021 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:15:01,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:01,022 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:15:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:01,022 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:15:01,022 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:15:01,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:01,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:15:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2018-09-28 10:15:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:15:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:15:01,119 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 15 [2018-09-28 10:15:01,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:01,120 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:15:01,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:15:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:01,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:01,120 INFO L375 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1] [2018-09-28 10:15:01,121 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:01,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:01,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1191907192, now seen corresponding path program 108 times [2018-09-28 10:15:01,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:01,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:01,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:01,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:01,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:01,864 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:01,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:01,872 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:01,883 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:15:01,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:01,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:01,908 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:01,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:15:01,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:15:01,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:15:01,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:01,909 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 9 states. [2018-09-28 10:15:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:02,048 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:15:02,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:02,048 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:15:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:02,048 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:15:02,048 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:15:02,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:02,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:15:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-28 10:15:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:02,123 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:15:02,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:02,123 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:02,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:02,123 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:02,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:02,124 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:15:02,124 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:02,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:02,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1191909114, now seen corresponding path program 109 times [2018-09-28 10:15:02,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:02,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:02,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:02,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:02,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:02,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:02,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:02,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:02,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:02,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:02,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:15:02,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:15:02,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:15:02,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:02,429 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:15:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:02,567 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:15:02,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:02,567 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:15:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:02,567 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:15:02,567 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:15:02,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:15:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2018-09-28 10:15:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:02,643 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:15:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:02,643 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:02,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:02,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:02,644 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:15:02,644 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:02,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:02,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1193754234, now seen corresponding path program 110 times [2018-09-28 10:15:02,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:02,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:02,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:02,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:02,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:02,700 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:02,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:02,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:02,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:02,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:02,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:02,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:02,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:15:02,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:15:02,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:15:02,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:02,779 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:15:02,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:02,970 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:15:02,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:02,970 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:15:02,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:02,971 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:15:02,971 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:15:02,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:15:03,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-28 10:15:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:03,047 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:15:03,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:03,047 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:03,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:03,047 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:03,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:03,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:03,047 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:15:03,047 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:03,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:03,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1193756156, now seen corresponding path program 111 times [2018-09-28 10:15:03,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:03,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:03,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:03,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:03,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:03,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:03,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:03,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:03,158 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:03,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-09-28 10:15:03,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:03,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:03,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:03,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:15:03,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:15:03,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:15:03,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:03,189 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:15:03,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:03,330 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:15:03,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:03,330 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:15:03,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:03,330 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:15:03,330 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:15:03,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:15:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2018-09-28 10:15:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:15:03,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:15:03,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 15 [2018-09-28 10:15:03,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:03,429 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:15:03,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:15:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:03,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:03,429 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1] [2018-09-28 10:15:03,430 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:03,430 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:03,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1328052742, now seen corresponding path program 112 times [2018-09-28 10:15:03,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:03,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:03,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:03,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:03,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:03,744 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:03,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:03,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:03,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:03,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:03,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:03,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:03,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:15:03,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:15:03,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:15:03,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:03,780 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 9 states. [2018-09-28 10:15:03,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:03,896 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:15:03,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:03,896 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:15:03,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:03,897 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:15:03,897 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:15:03,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:03,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:15:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2018-09-28 10:15:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:03,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:03,975 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:15:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:03,976 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:03,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:03,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:03,976 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:15:03,976 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:03,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1328050820, now seen corresponding path program 113 times [2018-09-28 10:15:03,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:03,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:03,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:03,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:03,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:04,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:04,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:04,042 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:04,048 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:15:04,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:04,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:04,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:04,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:15:04,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:15:04,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:15:04,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:04,073 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:15:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:04,222 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:15:04,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:04,222 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:15:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:04,222 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:15:04,222 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:15:04,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:15:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2018-09-28 10:15:04,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:04,290 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 15 [2018-09-28 10:15:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:04,290 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:04,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:04,290 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:04,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:04,291 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1] [2018-09-28 10:15:04,291 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:04,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:04,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1326205700, now seen corresponding path program 114 times [2018-09-28 10:15:04,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:04,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:04,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:04,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:04,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:04,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:04,366 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:04,376 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:04,384 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:15:04,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:04,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:04,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:04,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:15:04,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:15:04,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:15:04,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:04,409 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 9 states. [2018-09-28 10:15:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:04,539 INFO L93 Difference]: Finished difference Result 33 states and 46 transitions. [2018-09-28 10:15:04,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:04,539 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:15:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:04,540 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:15:04,540 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:15:04,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:04,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:15:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-09-28 10:15:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:04,614 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 15 [2018-09-28 10:15:04,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:04,614 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:04,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:15:04,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:04,615 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2018-09-28 10:15:04,615 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:04,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:04,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1326203778, now seen corresponding path program 6 times [2018-09-28 10:15:04,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:04,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:04,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:04,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:04,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:04,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:04,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:04,692 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:04,701 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:15:04,701 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:04,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:04,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:04,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:15:04,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:15:04,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:15:04,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:04,730 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 9 states. [2018-09-28 10:15:04,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:04,891 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2018-09-28 10:15:04,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:15:04,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2018-09-28 10:15:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:04,892 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:15:04,892 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:15:04,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-28 10:15:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:15:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2018-09-28 10:15:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:15:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2018-09-28 10:15:04,969 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 15 [2018-09-28 10:15:04,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:04,969 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2018-09-28 10:15:04,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:15:04,969 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2018-09-28 10:15:04,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:04,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:04,970 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-28 10:15:04,970 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:04,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:04,970 INFO L82 PathProgramCache]: Analyzing trace with hash -168156555, now seen corresponding path program 7 times [2018-09-28 10:15:04,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:04,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:04,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:04,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:04,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:05,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:05,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:05,217 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:05,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:05,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:05,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:05,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:05,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:05,252 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand 10 states. [2018-09-28 10:15:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:05,458 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:05,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:05,459 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:05,459 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:05,460 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:05,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:05,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:05,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:15:05,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:05,557 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:05,557 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:05,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:05,557 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:05,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:05,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:05,557 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:15:05,558 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:05,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash -168154633, now seen corresponding path program 115 times [2018-09-28 10:15:05,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:05,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:05,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:05,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:05,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:05,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:05,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:05,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:05,648 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:05,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:05,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:05,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:05,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:05,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:05,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:05,681 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:05,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:05,894 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:15:05,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:05,894 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:05,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:05,895 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:05,895 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:15:05,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:15:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:15:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:06,005 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:06,006 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:06,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:06,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:06,006 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:15:06,006 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:06,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:06,007 INFO L82 PathProgramCache]: Analyzing trace with hash -166309513, now seen corresponding path program 116 times [2018-09-28 10:15:06,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:06,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:06,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:06,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:06,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:06,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:06,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:06,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:06,107 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:06,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:06,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:06,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:06,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:06,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:06,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:06,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:06,132 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:06,354 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:06,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:06,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:06,355 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:06,355 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:06,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:06,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:15:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:06,446 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:06,446 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:06,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:06,446 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:06,447 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:06,447 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:06,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:06,447 INFO L82 PathProgramCache]: Analyzing trace with hash -166307591, now seen corresponding path program 117 times [2018-09-28 10:15:06,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:06,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:06,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:06,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:06,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:06,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:06,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:06,531 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:06,540 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:06,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:06,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:06,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:06,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:06,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:06,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:06,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:06,564 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:06,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:06,800 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:15:06,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:06,800 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:06,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:06,801 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:06,801 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:15:06,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:15:06,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:15:06,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:06,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:06,889 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:15:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:06,889 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:06,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:06,890 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:06,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:06,890 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:15:06,890 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:06,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:06,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1606850807, now seen corresponding path program 118 times [2018-09-28 10:15:06,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:06,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:06,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:06,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:06,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:06,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:06,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:06,959 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:06,966 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:06,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:06,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:06,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:06,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:06,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:06,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:06,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:06,990 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:15:07,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:07,193 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:15:07,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:07,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:07,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:07,194 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:07,194 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:15:07,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:15:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:15:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:07,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:07,312 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:07,312 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:07,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:07,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:07,312 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:07,313 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:07,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1606852729, now seen corresponding path program 119 times [2018-09-28 10:15:07,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:07,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:07,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:07,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:07,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:07,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:07,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:07,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:07,467 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:07,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:07,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:07,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:07,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:07,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:07,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:07,494 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:07,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:07,693 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:15:07,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:07,693 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:07,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:07,694 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:07,694 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:15:07,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:07,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:15:07,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-28 10:15:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:07,788 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:07,789 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:07,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:07,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:07,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:07,789 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:07,789 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:07,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:07,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1608697849, now seen corresponding path program 120 times [2018-09-28 10:15:07,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:07,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:07,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:07,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:07,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:07,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:07,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:07,863 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:07,875 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:07,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:07,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:07,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:07,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:07,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:07,899 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:08,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:08,111 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:08,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:08,111 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:08,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:08,111 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:08,112 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:08,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:15:08,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:08,210 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:08,210 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:08,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:08,210 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:08,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:08,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:08,211 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:08,211 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:08,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:08,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1608699771, now seen corresponding path program 121 times [2018-09-28 10:15:08,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:08,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:08,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:08,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:08,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:08,278 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:08,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:08,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:08,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:08,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:08,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:08,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:08,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:08,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:08,315 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:08,496 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:15:08,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:08,496 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:08,497 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:15:08,497 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:15:08,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:15:08,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-28 10:15:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:15:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:15:08,572 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:15:08,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:08,572 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:15:08,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:08,572 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:15:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:08,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:08,573 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:15:08,573 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:08,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash 511901815, now seen corresponding path program 122 times [2018-09-28 10:15:08,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:08,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:08,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:08,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:08,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:08,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:08,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:08,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:08,670 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:08,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:08,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:08,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:08,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:08,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:08,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:08,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:08,696 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:15:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:08,923 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:08,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:08,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:08,924 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:08,924 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:08,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:09,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:15:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:09,025 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:09,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:09,025 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:09,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:09,025 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:09,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:09,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:09,026 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:09,026 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:09,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:09,026 INFO L82 PathProgramCache]: Analyzing trace with hash 511903737, now seen corresponding path program 123 times [2018-09-28 10:15:09,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:09,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:09,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:09,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:09,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:09,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:09,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:09,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:09,099 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:09,110 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:09,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:09,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:09,133 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:09,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:09,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:09,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:09,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:09,134 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:09,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:09,358 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:15:09,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:09,358 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:09,359 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:09,359 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:15:09,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:09,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:15:09,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:15:09,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:09,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:09,451 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:09,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:09,451 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:09,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:09,452 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:09,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:09,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:09,452 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:09,452 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:09,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:09,452 INFO L82 PathProgramCache]: Analyzing trace with hash 513748857, now seen corresponding path program 124 times [2018-09-28 10:15:09,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:09,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:09,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:09,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:09,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:09,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:09,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:09,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:09,568 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:09,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:09,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:09,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:09,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:09,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:09,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:09,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:09,592 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:09,843 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:09,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:09,843 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:09,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:09,844 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:09,844 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:09,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:15:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:09,936 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:09,936 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:09,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:09,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:09,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:09,936 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:09,936 INFO L423 AbstractCegarLoop]: === Iteration 139 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:09,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash 513750779, now seen corresponding path program 125 times [2018-09-28 10:15:09,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:09,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:09,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:09,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:09,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:10,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:10,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:10,047 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:10,057 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:10,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:10,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:10,081 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:10,081 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:10,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:10,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:10,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:10,082 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:10,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:10,300 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:15:10,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:10,300 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:10,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:10,300 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:10,300 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:15:10,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:10,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:15:10,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:15:10,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:10,385 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:15:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:10,386 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:10,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:10,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:10,386 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:10,386 INFO L423 AbstractCegarLoop]: === Iteration 140 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:10,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash -2008058119, now seen corresponding path program 126 times [2018-09-28 10:15:10,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:10,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:10,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:10,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:10,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:10,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:10,462 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:10,472 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:10,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:10,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:10,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:10,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:10,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:10,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:10,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:10,501 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:15:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:10,720 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:15:10,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:10,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:10,721 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:10,721 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:15:10,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:10,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:15:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:15:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:10,815 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:10,815 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:10,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:10,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:10,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:10,816 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:10,816 INFO L423 AbstractCegarLoop]: === Iteration 141 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:10,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:10,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2008056197, now seen corresponding path program 127 times [2018-09-28 10:15:10,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:10,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:10,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:10,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:11,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:11,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:11,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:11,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:11,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:11,136 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:11,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:11,136 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:11,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:11,352 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:15:11,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:11,352 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:11,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:11,353 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:11,353 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:15:11,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:11,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:15:11,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-28 10:15:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:11,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:11,443 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:11,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:11,443 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:11,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:11,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:11,444 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:11,444 INFO L423 AbstractCegarLoop]: === Iteration 142 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:11,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:11,444 INFO L82 PathProgramCache]: Analyzing trace with hash -2006211077, now seen corresponding path program 128 times [2018-09-28 10:15:11,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:11,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:11,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:11,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:11,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:11,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:11,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:11,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:11,527 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:11,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:11,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:11,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:11,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:11,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:11,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:11,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:11,552 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:11,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:11,775 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:11,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:11,775 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:11,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:11,776 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:11,776 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:11,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:15:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:11,887 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:11,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:11,887 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:11,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:11,887 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:11,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:11,888 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:11,888 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:11,888 INFO L423 AbstractCegarLoop]: === Iteration 143 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:11,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:11,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2006209155, now seen corresponding path program 129 times [2018-09-28 10:15:11,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:11,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:11,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:11,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:11,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:12,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:12,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:12,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:12,111 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:12,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:12,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:12,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:12,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:12,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:12,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:12,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:12,135 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:12,335 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:15:12,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:12,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:12,336 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:15:12,336 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:15:12,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:15:12,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-28 10:15:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:15:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:15:12,418 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-28 10:15:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:12,418 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:15:12,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:12,418 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:15:12,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:12,418 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:12,418 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:15:12,419 INFO L423 AbstractCegarLoop]: === Iteration 144 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:12,419 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:12,419 INFO L82 PathProgramCache]: Analyzing trace with hash 532908023, now seen corresponding path program 130 times [2018-09-28 10:15:12,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:12,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:12,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:12,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:12,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:12,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:12,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:12,569 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:12,575 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:12,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:12,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:12,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:12,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:12,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:12,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:12,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:12,600 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-28 10:15:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:12,812 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:12,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:12,812 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:12,812 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:12,812 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:12,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:15:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:12,913 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:12,913 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:12,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:12,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:12,913 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:12,914 INFO L423 AbstractCegarLoop]: === Iteration 145 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:12,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:12,914 INFO L82 PathProgramCache]: Analyzing trace with hash 532909945, now seen corresponding path program 131 times [2018-09-28 10:15:12,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:12,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:12,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:12,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:12,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:12,988 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:12,988 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:12,998 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:13,007 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:13,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:13,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:13,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:13,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:13,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:13,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:13,031 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:13,240 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:13,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:13,240 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:13,241 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:13,241 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:13,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:15:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:13,338 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:13,339 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:13,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:13,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:13,339 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:13,339 INFO L423 AbstractCegarLoop]: === Iteration 146 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:13,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:13,339 INFO L82 PathProgramCache]: Analyzing trace with hash 534755065, now seen corresponding path program 132 times [2018-09-28 10:15:13,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:13,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:13,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:13,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,406 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:13,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:13,413 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:13,423 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:13,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:13,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,447 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:13,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:13,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:13,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:13,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:13,447 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:13,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:13,649 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:15:13,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:13,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:13,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:13,650 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:15:13,650 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:15:13,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:15:13,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:15:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:13,758 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:13,758 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:13,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:13,758 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:13,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:13,759 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:13,759 INFO L423 AbstractCegarLoop]: === Iteration 147 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:13,759 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:13,759 INFO L82 PathProgramCache]: Analyzing trace with hash 534756987, now seen corresponding path program 133 times [2018-09-28 10:15:13,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:13,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:13,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:13,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:13,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:13,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:13,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:13,834 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:13,855 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:13,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:13,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:13,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:13,855 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:14,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:14,047 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:15:14,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:14,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:14,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:14,048 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:15:14,048 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:15:14,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:15:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:15:14,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:14,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:14,140 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:15:14,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:14,140 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:14,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:14,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:14,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:14,141 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:14,141 INFO L423 AbstractCegarLoop]: === Iteration 148 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:14,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:14,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1987051911, now seen corresponding path program 134 times [2018-09-28 10:15:14,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:14,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:14,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:14,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:14,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:14,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:14,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:14,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:14,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:14,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:14,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:14,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:14,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:14,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:14,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:14,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:14,245 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:15:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:14,460 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:14,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:14,460 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:14,461 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:14,461 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:14,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:15:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:14,571 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:14,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:14,571 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:14,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:14,571 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:14,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:14,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:14,572 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:14,572 INFO L423 AbstractCegarLoop]: === Iteration 149 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:14,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:14,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1987049989, now seen corresponding path program 135 times [2018-09-28 10:15:14,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:14,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:14,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:14,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:14,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:14,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:14,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:14,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:14,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:14,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:14,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:14,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:14,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:14,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:14,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:14,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:14,783 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:15,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:15,015 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:15,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:15,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:15,016 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:15,016 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:15,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:15:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:15,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:15,116 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:15,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:15,117 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:15,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:15,117 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:15,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:15,117 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:15,117 INFO L423 AbstractCegarLoop]: === Iteration 150 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:15,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:15,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1985204869, now seen corresponding path program 136 times [2018-09-28 10:15:15,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:15,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:15,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:15,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:15,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:15,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:15,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:15,190 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:15,196 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:15,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:15,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:15,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:15,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:15,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:15,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:15,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:15,223 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:15,437 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:15:15,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:15,437 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:15,437 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:15:15,437 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:15:15,438 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:15:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:15:15,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:15,541 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:15,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:15,541 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:15,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:15,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:15,542 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:15,542 INFO L423 AbstractCegarLoop]: === Iteration 151 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:15,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:15,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1985202947, now seen corresponding path program 137 times [2018-09-28 10:15:15,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:15,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:15,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:15,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:15,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:15,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:15,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:15,638 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:15,646 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:15,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:15,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:15,670 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:15,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:15,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:15,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:15,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:15,671 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:15,875 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:15:15,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:15,875 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:15,876 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:15:15,876 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:15:15,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:15,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:15:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:15:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:15:15,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:15:15,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:15:15,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:15,976 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:15:15,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:15:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:15,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:15,976 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:15,976 INFO L423 AbstractCegarLoop]: === Iteration 152 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:15,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:15,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1212966393, now seen corresponding path program 138 times [2018-09-28 10:15:15,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:15,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:15,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:15,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:15,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:16,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:16,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:16,052 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:16,061 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:16,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:16,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:16,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:16,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:16,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:16,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:16,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:16,085 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:15:16,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:16,280 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:15:16,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:16,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:16,281 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:15:16,281 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:15:16,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:15:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-28 10:15:16,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:16,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:16,389 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:16,389 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:16,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:16,390 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:16,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:16,390 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:16,390 INFO L423 AbstractCegarLoop]: === Iteration 153 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:16,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1212968315, now seen corresponding path program 139 times [2018-09-28 10:15:16,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:16,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:16,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:16,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:16,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:16,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:16,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:16,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:16,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:16,492 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:16,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:16,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:16,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:16,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:16,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:16,513 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:16,721 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:15:16,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:16,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:16,721 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:15:16,721 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:15:16,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:16,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:15:16,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-28 10:15:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:16,831 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:16,831 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:16,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:16,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:16,831 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:16,832 INFO L423 AbstractCegarLoop]: === Iteration 154 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:16,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:16,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1214813435, now seen corresponding path program 140 times [2018-09-28 10:15:16,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:16,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:16,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:16,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:16,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:16,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:16,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:16,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:16,927 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:16,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:16,928 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:16,930 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:16,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:16,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:16,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:16,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:16,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:16,951 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:17,155 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:15:17,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:17,155 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:17,156 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:15:17,156 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:15:17,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:17,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:15:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-28 10:15:17,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:17,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:17,272 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:17,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:17,272 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:17,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:17,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:17,272 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:17,272 INFO L423 AbstractCegarLoop]: === Iteration 155 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:17,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:17,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1214815357, now seen corresponding path program 141 times [2018-09-28 10:15:17,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:17,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:17,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:17,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:17,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:17,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:17,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:17,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:17,352 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:17,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:17,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:17,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:17,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:17,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:17,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:17,378 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:17,580 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:15:17,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:17,580 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:17,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:17,580 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:15:17,580 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:15:17,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:15:17,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:15:17,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:17,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:17,687 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:15:17,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:17,688 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:17,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:17,688 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:17,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:17,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:17,688 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:17,688 INFO L423 AbstractCegarLoop]: === Iteration 156 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:17,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:17,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1306993541, now seen corresponding path program 142 times [2018-09-28 10:15:17,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:17,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:17,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:17,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:17,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:17,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:17,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:17,841 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:17,847 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:17,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:17,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:17,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:17,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:17,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:17,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:17,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:17,871 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:15:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:18,064 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:15:18,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:18,064 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:18,064 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:15:18,064 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:15:18,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:15:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-28 10:15:18,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:18,167 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:18,167 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:18,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:18,168 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:18,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:18,168 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:18,168 INFO L423 AbstractCegarLoop]: === Iteration 157 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:18,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:18,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1306991619, now seen corresponding path program 143 times [2018-09-28 10:15:18,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:18,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:18,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:18,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:18,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:18,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:18,235 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:18,244 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:18,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:18,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:18,268 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:18,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:18,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:18,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:18,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:18,268 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:18,467 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:15:18,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:18,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:18,467 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:15:18,467 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:15:18,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:18,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:15:18,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-28 10:15:18,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:18,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:18,573 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:18,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:18,574 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:18,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:18,574 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:18,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:18,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:18,574 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:18,574 INFO L423 AbstractCegarLoop]: === Iteration 158 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:18,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:18,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1305146499, now seen corresponding path program 144 times [2018-09-28 10:15:18,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:18,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:18,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:18,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:18,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:18,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:18,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:18,644 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:18,652 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:18,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:18,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:18,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:18,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:18,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:18,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:18,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:18,678 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:18,847 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:15:18,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:18,847 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:18,848 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:15:18,848 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:15:18,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:18,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:15:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-28 10:15:18,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:18,963 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:18,963 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:18,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:18,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:18,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:18,964 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:18,964 INFO L423 AbstractCegarLoop]: === Iteration 159 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:18,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1305144577, now seen corresponding path program 145 times [2018-09-28 10:15:18,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:18,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:18,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:18,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:19,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:19,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:19,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:19,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:19,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:19,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:19,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:19,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:19,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:19,067 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:19,234 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-28 10:15:19,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:19,234 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:19,235 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:15:19,235 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:15:19,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:15:19,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-28 10:15:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:15:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:15:19,309 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-28 10:15:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:19,309 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:15:19,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:15:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:19,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:19,310 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:15:19,310 INFO L423 AbstractCegarLoop]: === Iteration 160 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:19,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:19,310 INFO L82 PathProgramCache]: Analyzing trace with hash -754962569, now seen corresponding path program 146 times [2018-09-28 10:15:19,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:19,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:19,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:19,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:19,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:19,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:19,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:19,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:19,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:19,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:19,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:19,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:19,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:19,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:19,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:19,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:19,537 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-28 10:15:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:19,825 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:19,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:19,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:19,826 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:19,826 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:19,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:19,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:15:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:19,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:19,981 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:19,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:19,981 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:19,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:19,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:19,981 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:19,981 INFO L423 AbstractCegarLoop]: === Iteration 161 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:19,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:19,982 INFO L82 PathProgramCache]: Analyzing trace with hash -754960647, now seen corresponding path program 147 times [2018-09-28 10:15:19,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:19,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:19,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:19,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:19,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:20,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:20,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:20,053 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:20,062 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:20,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:20,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:20,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:20,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:20,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:20,090 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:20,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:20,354 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:15:20,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:20,354 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:20,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:20,355 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:20,355 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:15:20,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:20,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:15:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:15:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:20,473 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:20,473 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:20,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:20,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:20,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:20,474 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:20,474 INFO L423 AbstractCegarLoop]: === Iteration 162 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:20,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:20,474 INFO L82 PathProgramCache]: Analyzing trace with hash -753115527, now seen corresponding path program 148 times [2018-09-28 10:15:20,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:20,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:20,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:20,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:20,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:20,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:20,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:20,546 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:20,551 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:20,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:20,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:20,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:20,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:20,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:20,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:20,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:20,577 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:20,879 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:20,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:20,879 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:20,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:20,879 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:20,879 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:20,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:20,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:15:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:20,999 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:20,999 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:20,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:20,999 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:20,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:20,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:20,999 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:21,000 INFO L423 AbstractCegarLoop]: === Iteration 163 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:21,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:21,000 INFO L82 PathProgramCache]: Analyzing trace with hash -753113605, now seen corresponding path program 149 times [2018-09-28 10:15:21,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:21,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:21,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:21,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:21,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:21,061 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:21,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:21,061 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:21,068 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:21,077 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:21,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:21,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:21,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:21,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:21,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:21,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:21,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:21,102 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:21,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:21,369 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:15:21,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:21,369 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:21,370 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:21,370 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:15:21,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:15:21,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:15:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:21,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:21,482 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:15:21,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:21,482 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:21,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:21,482 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:21,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:21,482 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:21,482 INFO L423 AbstractCegarLoop]: === Iteration 164 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:21,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:21,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1020044793, now seen corresponding path program 150 times [2018-09-28 10:15:21,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:21,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:21,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:21,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:21,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:21,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:21,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:21,552 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:21,563 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:21,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:21,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:21,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:21,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:21,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:21,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:21,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:21,593 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:15:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:21,850 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:15:21,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:21,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:21,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:21,851 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:21,851 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:15:21,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:21,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:15:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:15:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:21,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:21,975 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:21,975 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:21,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:21,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:21,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:21,975 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:21,975 INFO L423 AbstractCegarLoop]: === Iteration 165 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:21,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:21,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1020046715, now seen corresponding path program 151 times [2018-09-28 10:15:21,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:21,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:21,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:21,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:21,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:22,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:22,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:22,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:22,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:22,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:22,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:22,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:22,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:22,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:22,079 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:22,348 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:15:22,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:22,348 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:22,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:22,349 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:22,349 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:15:22,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:15:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-28 10:15:22,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:22,467 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:22,467 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:22,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:22,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:22,468 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:22,468 INFO L423 AbstractCegarLoop]: === Iteration 166 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:22,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:22,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1021891835, now seen corresponding path program 152 times [2018-09-28 10:15:22,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:22,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:22,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:22,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:22,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:22,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:22,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:22,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:22,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:22,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:22,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:22,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:22,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:22,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:22,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:22,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:22,627 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:22,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:22,853 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:22,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:22,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:22,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:22,853 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:22,854 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:22,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:22,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:22,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:15:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:22,979 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:22,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:22,980 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:22,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:22,980 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:22,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:22,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:22,980 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:22,980 INFO L423 AbstractCegarLoop]: === Iteration 167 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:22,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:22,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1021893757, now seen corresponding path program 153 times [2018-09-28 10:15:22,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:22,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:22,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:22,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:22,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:23,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:23,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:23,314 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:23,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:23,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:23,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:23,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:23,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:23,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:23,339 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:23,565 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:15:23,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:23,565 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:23,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:23,566 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:15:23,566 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:15:23,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:23,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:15:23,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2018-09-28 10:15:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:15:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:15:23,665 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:15:23,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:23,666 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:15:23,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:15:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:23,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:23,666 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:23,666 INFO L423 AbstractCegarLoop]: === Iteration 168 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:23,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:23,666 INFO L82 PathProgramCache]: Analyzing trace with hash -74904199, now seen corresponding path program 154 times [2018-09-28 10:15:23,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:23,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:23,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:23,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:23,733 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:23,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:23,750 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:23,772 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:23,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:23,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:23,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:23,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:23,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:23,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:23,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:23,796 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:15:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:24,083 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:24,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:24,083 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:24,084 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:24,084 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:24,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:15:24,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:24,211 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:24,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:24,211 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:24,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:24,211 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:24,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:24,212 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:24,212 INFO L423 AbstractCegarLoop]: === Iteration 169 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:24,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:24,212 INFO L82 PathProgramCache]: Analyzing trace with hash -74902277, now seen corresponding path program 155 times [2018-09-28 10:15:24,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:24,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:24,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:24,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:24,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:24,281 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:24,289 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:24,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:24,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:24,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:24,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:24,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:24,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:24,313 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:24,589 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:15:24,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:24,589 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:24,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:24,590 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:24,590 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:15:24,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:24,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:15:24,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2018-09-28 10:15:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:24,707 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:24,708 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:24,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:24,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:24,708 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:24,708 INFO L423 AbstractCegarLoop]: === Iteration 170 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:24,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:24,709 INFO L82 PathProgramCache]: Analyzing trace with hash -73057157, now seen corresponding path program 156 times [2018-09-28 10:15:24,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:24,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:24,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:24,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:24,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,856 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:24,856 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:24,863 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:24,872 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:24,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:24,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:24,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:24,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:24,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:24,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:24,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:24,897 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:25,175 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:25,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:25,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:25,176 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:25,176 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:25,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:15:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:25,304 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:25,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:25,304 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:25,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:25,305 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:25,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:25,305 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:25,305 INFO L423 AbstractCegarLoop]: === Iteration 171 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:25,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:25,305 INFO L82 PathProgramCache]: Analyzing trace with hash -73055235, now seen corresponding path program 157 times [2018-09-28 10:15:25,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:25,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:25,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:25,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:25,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:25,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:25,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:25,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:25,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:25,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:25,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:25,408 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:25,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:25,694 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:15:25,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:25,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:25,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:25,694 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:25,694 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:15:25,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:15:25,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:15:25,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:25,814 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:15:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:25,814 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:25,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:25,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:25,814 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:25,815 INFO L423 AbstractCegarLoop]: === Iteration 172 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:25,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:25,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1700103163, now seen corresponding path program 158 times [2018-09-28 10:15:25,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:25,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:25,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:25,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:25,878 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,878 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:25,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:25,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:25,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:25,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:25,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:25,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:25,915 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:25,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:25,916 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:15:26,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:26,195 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:15:26,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:26,195 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:26,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:26,196 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:26,196 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:15:26,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:15:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:15:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:26,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:26,320 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:26,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:26,320 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:26,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:26,320 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:26,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:26,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:26,321 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:26,321 INFO L423 AbstractCegarLoop]: === Iteration 173 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:26,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:26,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1700105085, now seen corresponding path program 159 times [2018-09-28 10:15:26,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:26,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:26,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:26,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:26,380 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:26,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:26,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:26,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:26,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:26,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:26,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:26,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:26,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:26,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:26,427 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:26,706 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:15:26,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:26,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:26,707 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:26,707 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:15:26,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:26,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:15:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-28 10:15:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:26,829 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:26,830 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:26,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:26,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:26,830 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:26,830 INFO L423 AbstractCegarLoop]: === Iteration 174 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:26,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:26,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1701950205, now seen corresponding path program 160 times [2018-09-28 10:15:26,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:26,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:26,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:26,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:26,892 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:26,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:26,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:26,899 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:26,905 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:26,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:26,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:26,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:26,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:26,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:26,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:26,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:26,930 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:27,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:27,190 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:27,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:27,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:27,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:27,191 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:27,191 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:27,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:15:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:27,316 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:27,316 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:27,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:27,316 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:27,317 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:27,317 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:27,317 INFO L423 AbstractCegarLoop]: === Iteration 175 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:27,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:27,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1701952127, now seen corresponding path program 161 times [2018-09-28 10:15:27,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:27,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:27,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:27,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:27,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:27,399 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:27,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:27,415 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:27,439 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:27,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:27,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:27,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:27,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:27,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:27,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:27,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:27,463 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:27,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:27,924 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:15:27,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:27,924 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:27,925 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:15:27,925 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:15:27,925 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:15:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2018-09-28 10:15:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:15:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:15:28,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-28 10:15:28,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:28,087 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:15:28,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:15:28,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:28,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:28,088 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:28,088 INFO L423 AbstractCegarLoop]: === Iteration 176 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:28,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:28,089 INFO L82 PathProgramCache]: Analyzing trace with hash -53897991, now seen corresponding path program 162 times [2018-09-28 10:15:28,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:28,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:28,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:28,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:28,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:29,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:29,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:29,025 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:29,121 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:29,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:29,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:29,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:29,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:29,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:29,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:29,158 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-28 10:15:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:29,494 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:29,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:29,494 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:29,495 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:29,495 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:29,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:29,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:29,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:15:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:29,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:29,628 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:29,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:29,628 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:29,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:29,628 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:29,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:29,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:29,629 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:29,629 INFO L423 AbstractCegarLoop]: === Iteration 177 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:29,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash -53896069, now seen corresponding path program 163 times [2018-09-28 10:15:29,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:29,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:29,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:29,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:29,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:29,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:29,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:29,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:29,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:29,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:29,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:29,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:29,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:29,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:29,729 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:29,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:29,984 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:29,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:29,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:29,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:29,984 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:29,984 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:29,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:29,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:15:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:30,112 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:30,112 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:30,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:30,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:30,113 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:30,113 INFO L423 AbstractCegarLoop]: === Iteration 178 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:30,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:30,113 INFO L82 PathProgramCache]: Analyzing trace with hash -52050949, now seen corresponding path program 164 times [2018-09-28 10:15:30,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:30,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:30,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:30,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:30,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:30,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:30,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:30,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:30,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:30,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:30,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:30,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:30,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:30,223 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:30,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:30,469 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:15:30,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:30,469 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:30,470 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:15:30,470 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:15:30,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:15:30,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:15:30,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:30,604 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:30,604 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:30,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:30,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:30,605 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:30,605 INFO L423 AbstractCegarLoop]: === Iteration 179 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:30,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:30,605 INFO L82 PathProgramCache]: Analyzing trace with hash -52049027, now seen corresponding path program 165 times [2018-09-28 10:15:30,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:30,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:30,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:30,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:30,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:30,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:30,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:30,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:30,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:30,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:30,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:30,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:30,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:30,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:30,706 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:30,955 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:15:30,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:30,955 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:30,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:30,956 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:15:30,956 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:15:30,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:30,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:15:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2018-09-28 10:15:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:31,072 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:15:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:31,072 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:31,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:31,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:31,072 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:31,072 INFO L423 AbstractCegarLoop]: === Iteration 180 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:31,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:31,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1721109371, now seen corresponding path program 166 times [2018-09-28 10:15:31,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:31,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:31,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:31,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:31,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:31,133 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:31,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:31,141 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:31,148 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:31,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:31,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:31,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:31,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:31,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:31,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:31,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:31,171 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:15:31,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:31,438 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:31,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:31,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:31,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:31,439 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:31,439 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:31,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:31,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:15:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:31,577 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:31,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:31,577 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:31,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:31,577 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:31,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:31,578 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:31,578 INFO L423 AbstractCegarLoop]: === Iteration 181 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:31,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:31,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1721111293, now seen corresponding path program 167 times [2018-09-28 10:15:31,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:31,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:31,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:31,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:31,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:31,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:31,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:31,647 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:31,657 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:31,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:31,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:31,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:31,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:31,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:31,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:31,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:31,680 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:31,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:31,956 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:15:31,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:31,956 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:31,957 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:15:31,957 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:15:31,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:15:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:15:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:32,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:32,083 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:32,084 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:32,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:32,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:32,084 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:32,084 INFO L423 AbstractCegarLoop]: === Iteration 182 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:32,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:32,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1722956413, now seen corresponding path program 168 times [2018-09-28 10:15:32,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:32,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:32,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:32,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:32,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:32,152 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:32,162 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:32,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:32,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:32,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:32,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:32,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:32,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:32,187 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:32,447 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:15:32,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:32,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:32,448 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:15:32,448 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:15:32,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:32,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:15:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:15:32,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:32,587 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:32,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:32,587 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:32,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:32,587 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:32,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:32,588 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:32,588 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:32,588 INFO L423 AbstractCegarLoop]: === Iteration 183 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:32,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:32,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1722958335, now seen corresponding path program 169 times [2018-09-28 10:15:32,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:32,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:32,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:32,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:32,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:32,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:32,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:32,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:32,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:32,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:32,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:32,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:32,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:32,700 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:32,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:32,930 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:15:32,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:32,930 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:32,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:32,930 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:15:32,930 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:15:32,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:15:33,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2018-09-28 10:15:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:15:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:15:33,036 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:15:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:33,036 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:15:33,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:15:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:33,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:33,036 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:33,036 INFO L423 AbstractCegarLoop]: === Iteration 184 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:33,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:33,037 INFO L82 PathProgramCache]: Analyzing trace with hash 626160379, now seen corresponding path program 170 times [2018-09-28 10:15:33,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:33,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:33,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:33,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:33,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:33,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:33,090 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:33,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:33,105 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:33,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:33,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:33,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:33,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:33,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:33,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:33,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:33,128 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:15:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:33,355 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:15:33,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:33,355 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:33,356 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:15:33,356 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:15:33,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:15:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-28 10:15:33,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:33,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:33,494 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:33,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:33,494 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:33,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:33,494 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:33,495 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:33,495 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:33,495 INFO L423 AbstractCegarLoop]: === Iteration 185 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:33,495 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:33,495 INFO L82 PathProgramCache]: Analyzing trace with hash 626162301, now seen corresponding path program 171 times [2018-09-28 10:15:33,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:33,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:33,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:33,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:33,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:33,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:33,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:33,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:33,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:33,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:33,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:33,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:33,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:33,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:33,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:33,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:33,597 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:33,822 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:15:33,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:33,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:33,823 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:15:33,823 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:15:33,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:33,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:15:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-09-28 10:15:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:33,958 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:33,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:33,958 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:33,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:33,958 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:33,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:33,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:33,959 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:33,959 INFO L423 AbstractCegarLoop]: === Iteration 186 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:33,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:33,959 INFO L82 PathProgramCache]: Analyzing trace with hash 628007421, now seen corresponding path program 172 times [2018-09-28 10:15:33,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:33,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:33,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:33,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:33,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:34,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:34,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:34,028 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:34,033 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:34,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:34,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:34,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:34,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:34,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:34,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:34,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:34,058 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:34,298 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:15:34,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:34,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:34,298 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:15:34,299 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:15:34,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:15:34,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-28 10:15:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:34,434 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:34,434 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:34,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:34,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:34,435 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:34,435 INFO L423 AbstractCegarLoop]: === Iteration 187 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:34,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash 628009343, now seen corresponding path program 173 times [2018-09-28 10:15:34,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:34,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:34,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:34,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:34,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:34,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:34,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:34,747 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:34,760 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:34,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:34,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:34,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:34,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:34,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:34,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:34,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:34,787 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:35,015 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:15:35,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:35,015 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:35,016 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:15:35,016 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:15:35,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:35,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:15:35,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2018-09-28 10:15:35,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:35,139 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:15:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:35,139 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:35,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:35,139 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:35,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:35,139 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:35,140 INFO L423 AbstractCegarLoop]: === Iteration 188 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:35,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:35,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1893799555, now seen corresponding path program 174 times [2018-09-28 10:15:35,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:35,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:35,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:35,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:35,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:35,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:35,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:35,229 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:35,260 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:35,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:35,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:35,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:35,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:35,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:35,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:35,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:35,289 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:15:35,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:35,539 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:15:35,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:35,539 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:35,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:35,540 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:15:35,540 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:15:35,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:15:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2018-09-28 10:15:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:35,680 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:35,680 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:35,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:35,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:35,680 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:35,680 INFO L423 AbstractCegarLoop]: === Iteration 189 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:35,681 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:35,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1893797633, now seen corresponding path program 175 times [2018-09-28 10:15:35,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:35,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:35,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:35,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:35,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:35,740 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:35,741 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:35,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:35,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:35,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:35,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:35,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:35,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:35,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:35,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:35,785 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:36,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:36,001 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:15:36,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:36,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:36,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:36,002 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:15:36,002 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:15:36,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:15:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2018-09-28 10:15:36,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:36,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:36,135 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:36,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:36,135 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:36,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:36,135 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:36,135 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:36,135 INFO L423 AbstractCegarLoop]: === Iteration 190 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:36,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:36,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1891952513, now seen corresponding path program 176 times [2018-09-28 10:15:36,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:36,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:36,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:36,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:36,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:36,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:36,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:36,224 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:36,232 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:36,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:36,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:36,264 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:36,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:36,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:36,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:36,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:36,265 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:36,461 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2018-09-28 10:15:36,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:36,461 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:36,462 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:15:36,462 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:15:36,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:36,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:15:36,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-09-28 10:15:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:36,600 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:36,600 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:36,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:36,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:36,601 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:15:36,601 INFO L423 AbstractCegarLoop]: === Iteration 191 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:36,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:36,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1891950591, now seen corresponding path program 177 times [2018-09-28 10:15:36,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:36,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:36,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:36,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:36,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:36,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:36,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:36,685 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:36,693 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:36,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:36,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:36,718 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:36,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:36,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:36,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:36,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:36,719 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:36,920 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2018-09-28 10:15:36,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:36,920 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:36,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:36,921 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:15:36,921 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:15:36,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:15:37,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2018-09-28 10:15:37,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:15:37,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:15:37,006 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-28 10:15:37,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:37,006 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:15:37,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:37,006 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:15:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:37,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:37,007 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:15:37,007 INFO L423 AbstractCegarLoop]: === Iteration 192 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:37,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:37,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1448020233, now seen corresponding path program 178 times [2018-09-28 10:15:37,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:37,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:37,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:37,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:37,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:37,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:37,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:37,271 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:37,277 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:37,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:37,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:37,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:37,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:37,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:37,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:37,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:37,301 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 10 states. [2018-09-28 10:15:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:37,688 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:15:37,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:37,688 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:37,689 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:15:37,689 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:15:37,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:15:37,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-28 10:15:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:37,851 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:37,851 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:37,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:37,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:37,852 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:37,852 INFO L423 AbstractCegarLoop]: === Iteration 193 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:37,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:37,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1448018311, now seen corresponding path program 179 times [2018-09-28 10:15:37,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:37,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:37,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:37,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:37,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:37,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:37,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:37,929 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:37,937 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:37,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:37,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:37,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:37,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:37,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:37,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:37,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:37,962 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:38,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:38,331 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:15:38,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:38,331 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:38,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:38,332 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:15:38,332 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:15:38,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:38,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:15:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-28 10:15:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:38,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:38,490 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:38,490 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:38,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:38,490 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:38,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:38,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:38,490 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:38,490 INFO L423 AbstractCegarLoop]: === Iteration 194 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:38,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:38,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1446173191, now seen corresponding path program 180 times [2018-09-28 10:15:38,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:38,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:38,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:38,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:38,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:38,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:38,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:38,562 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:38,571 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:38,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:38,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:38,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:38,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:38,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:38,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:38,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:38,602 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:38,974 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:15:38,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:38,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:38,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:38,974 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:15:38,974 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:15:38,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:38,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:15:39,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-28 10:15:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:39,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:39,163 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:39,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:39,163 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:39,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:39,163 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:39,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:39,163 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:39,164 INFO L423 AbstractCegarLoop]: === Iteration 195 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:39,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:39,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1446171269, now seen corresponding path program 181 times [2018-09-28 10:15:39,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:39,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:39,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:39,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:39,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:39,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:39,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:39,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:39,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:39,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:39,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:39,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:39,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:39,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:39,267 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:39,636 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:15:39,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:39,642 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:39,642 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:15:39,642 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:15:39,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:39,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:15:39,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-28 10:15:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:39,791 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:39,791 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:39,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:39,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:39,792 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:39,792 INFO L423 AbstractCegarLoop]: === Iteration 196 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:39,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:39,792 INFO L82 PathProgramCache]: Analyzing trace with hash 326987129, now seen corresponding path program 182 times [2018-09-28 10:15:39,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:39,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:39,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:39,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:39,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:39,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:39,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:39,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:39,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:39,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:39,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:39,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:39,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:39,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:39,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:39,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:39,895 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:40,294 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:15:40,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:40,294 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:40,295 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:15:40,295 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:15:40,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:40,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:15:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-28 10:15:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:40,457 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:40,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:40,457 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:40,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:40,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:40,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:40,458 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:40,458 INFO L423 AbstractCegarLoop]: === Iteration 197 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:40,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:40,458 INFO L82 PathProgramCache]: Analyzing trace with hash 326989051, now seen corresponding path program 183 times [2018-09-28 10:15:40,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:40,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:40,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:40,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:40,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:40,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:40,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:40,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:40,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:40,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:40,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:40,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:40,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:40,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:40,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:40,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:40,566 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:40,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:40,964 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:15:40,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:40,964 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:40,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:40,964 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:15:40,964 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:15:40,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:40,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:15:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-28 10:15:41,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:41,126 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:41,126 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:41,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:41,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:41,127 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:41,127 INFO L423 AbstractCegarLoop]: === Iteration 198 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:41,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:41,127 INFO L82 PathProgramCache]: Analyzing trace with hash 328834171, now seen corresponding path program 184 times [2018-09-28 10:15:41,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:41,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:41,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:41,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:41,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:41,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:41,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:41,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:41,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:41,205 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:41,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:41,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:41,228 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:41,228 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:41,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:41,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:41,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:41,229 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:41,615 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:15:41,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:41,615 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:41,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:41,615 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:15:41,615 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:15:41,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:15:41,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-28 10:15:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:41,791 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:41,791 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:41,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:41,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:41,791 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:41,792 INFO L423 AbstractCegarLoop]: === Iteration 199 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:41,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:41,792 INFO L82 PathProgramCache]: Analyzing trace with hash 328836093, now seen corresponding path program 185 times [2018-09-28 10:15:41,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:41,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:41,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:41,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:41,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:41,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:41,935 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:41,943 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:41,951 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:41,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:41,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:41,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:41,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:41,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:41,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:41,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:41,975 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:42,335 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:15:42,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:42,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:42,336 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:15:42,336 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:15:42,336 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:15:42,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-28 10:15:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:42,470 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:15:42,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:42,470 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:42,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:42,470 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:42,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:42,471 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:42,471 INFO L423 AbstractCegarLoop]: === Iteration 200 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:42,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:42,471 INFO L82 PathProgramCache]: Analyzing trace with hash -767961863, now seen corresponding path program 186 times [2018-09-28 10:15:42,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:42,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:42,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:42,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:42,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:42,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:42,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:42,538 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:42,546 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:42,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:42,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:42,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:42,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:42,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:42,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:42,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:42,581 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:15:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:43,029 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:15:43,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:43,029 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:43,030 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:15:43,030 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:15:43,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:43,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:15:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:15:43,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:43,203 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:43,203 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:43,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:43,203 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:43,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:43,204 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:43,204 INFO L423 AbstractCegarLoop]: === Iteration 201 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:43,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:43,204 INFO L82 PathProgramCache]: Analyzing trace with hash -767959941, now seen corresponding path program 187 times [2018-09-28 10:15:43,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:43,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:43,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:43,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:43,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:43,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:43,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:43,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:43,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:43,293 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:43,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:43,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:43,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:43,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:43,294 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:43,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:43,691 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:15:43,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:43,691 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:43,692 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:15:43,692 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:15:43,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:43,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:15:43,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-28 10:15:43,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:43,856 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:43,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:43,856 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:43,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:43,856 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:43,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:43,856 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:43,857 INFO L423 AbstractCegarLoop]: === Iteration 202 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:43,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:43,857 INFO L82 PathProgramCache]: Analyzing trace with hash -766114821, now seen corresponding path program 188 times [2018-09-28 10:15:43,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:43,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:43,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:43,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:43,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:43,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:43,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:43,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:43,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:43,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:43,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:43,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:43,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:43,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:43,955 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:44,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:44,522 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:15:44,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:44,522 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:44,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:44,523 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:15:44,523 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:15:44,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:15:44,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:15:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:44,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:44,692 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:44,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:44,692 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:44,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:44,692 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:44,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:44,692 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:44,692 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:44,693 INFO L423 AbstractCegarLoop]: === Iteration 203 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:44,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:44,693 INFO L82 PathProgramCache]: Analyzing trace with hash -766112899, now seen corresponding path program 189 times [2018-09-28 10:15:44,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:44,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:44,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:44,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:44,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:44,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:44,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:44,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:44,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:44,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:44,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:44,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:44,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:44,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:44,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:44,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:44,862 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:45,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:45,216 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:15:45,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:45,216 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:45,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:45,217 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:15:45,217 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:15:45,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:45,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:15:45,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-28 10:15:45,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:45,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:45,369 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:45,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:45,369 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:45,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:45,369 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:45,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:45,369 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:45,369 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:45,369 INFO L423 AbstractCegarLoop]: === Iteration 204 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:45,369 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:45,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1007045499, now seen corresponding path program 190 times [2018-09-28 10:15:45,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:45,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:45,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:45,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:45,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:45,434 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:45,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:45,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:45,441 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:45,447 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:45,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:45,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:45,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:45,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:45,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:45,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:45,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:45,482 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:45,953 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:45,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:45,953 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:45,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:45,954 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:45,954 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:45,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:45,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:46,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-28 10:15:46,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:46,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:46,121 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:46,121 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:46,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:46,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:46,121 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:46,121 INFO L423 AbstractCegarLoop]: === Iteration 205 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:46,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:46,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1007047421, now seen corresponding path program 191 times [2018-09-28 10:15:46,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:46,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:46,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:46,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:46,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:46,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:46,194 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:46,202 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:46,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:46,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:46,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:46,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:46,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:46,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:46,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:46,226 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:46,574 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:46,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:46,574 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:46,575 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:46,575 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:46,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:46,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:15:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:46,738 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:46,738 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:46,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:46,738 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:46,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:46,739 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:46,739 INFO L423 AbstractCegarLoop]: === Iteration 206 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:46,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:46,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1008892541, now seen corresponding path program 192 times [2018-09-28 10:15:46,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:46,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:46,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:46,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:46,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:46,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:46,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:46,816 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:46,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:46,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:46,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:46,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:46,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:46,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:46,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:46,840 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:47,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:47,180 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:15:47,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:47,180 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:47,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:47,181 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:47,181 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:15:47,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:15:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:15:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:47,355 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:47,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:47,356 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:47,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:47,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:47,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:47,356 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:47,356 INFO L423 AbstractCegarLoop]: === Iteration 207 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:47,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:47,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1008894463, now seen corresponding path program 193 times [2018-09-28 10:15:47,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:47,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:47,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:47,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:47,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:47,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:47,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:47,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:47,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:47,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:47,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:47,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:47,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:47,475 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:47,790 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:15:47,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:47,790 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:47,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:47,791 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:47,791 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:15:47,791 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:15:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 24. [2018-09-28 10:15:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:15:47,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:15:47,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:15:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:47,921 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:15:47,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:47,921 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:15:47,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:47,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:47,921 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:47,921 INFO L423 AbstractCegarLoop]: === Iteration 208 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:47,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:47,922 INFO L82 PathProgramCache]: Analyzing trace with hash -746955655, now seen corresponding path program 194 times [2018-09-28 10:15:47,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:47,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:47,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:47,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:47,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:47,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:47,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:47,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:47,997 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:47,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:47,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:48,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:48,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:48,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:48,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:48,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:48,021 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:15:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:48,440 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:15:48,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:48,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:48,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:48,440 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:15:48,441 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:15:48,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:48,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:15:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-28 10:15:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:48,618 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:48,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:48,619 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:48,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:48,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:48,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:48,619 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:48,619 INFO L423 AbstractCegarLoop]: === Iteration 209 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:48,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:48,619 INFO L82 PathProgramCache]: Analyzing trace with hash -746953733, now seen corresponding path program 195 times [2018-09-28 10:15:48,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:48,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:48,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:48,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:48,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:48,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:48,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:48,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:48,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:48,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:48,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:48,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:48,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:48,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:48,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:48,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:48,759 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:49,192 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:15:49,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:49,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:49,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:49,192 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:15:49,192 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:15:49,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:15:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-28 10:15:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:49,367 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:49,367 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:49,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:49,367 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:49,367 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:49,367 INFO L423 AbstractCegarLoop]: === Iteration 210 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:49,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:49,368 INFO L82 PathProgramCache]: Analyzing trace with hash -745108613, now seen corresponding path program 196 times [2018-09-28 10:15:49,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:49,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:49,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:49,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:49,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:49,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:49,441 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:49,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:49,454 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:49,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:49,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:49,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:49,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:49,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:49,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:49,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:49,478 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:49,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:49,873 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:15:49,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:49,873 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:49,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:49,874 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:15:49,874 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:15:49,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:15:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-28 10:15:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:50,056 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:50,056 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:50,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:50,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:50,057 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:50,057 INFO L423 AbstractCegarLoop]: === Iteration 211 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:50,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:50,057 INFO L82 PathProgramCache]: Analyzing trace with hash -745106691, now seen corresponding path program 197 times [2018-09-28 10:15:50,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:50,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:50,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:50,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:50,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:50,117 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:50,118 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:50,118 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:50,126 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:50,134 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:50,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:50,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:50,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:50,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:50,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:50,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:50,158 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:50,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:50,560 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:15:50,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:50,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:50,561 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:15:50,561 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:15:50,561 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:15:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 28. [2018-09-28 10:15:50,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:50,725 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:50,725 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:50,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:50,725 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:50,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:50,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:50,725 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:50,725 INFO L423 AbstractCegarLoop]: === Iteration 212 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:50,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:50,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1028051707, now seen corresponding path program 198 times [2018-09-28 10:15:50,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:50,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:50,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:50,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:50,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:50,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:50,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:50,807 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:50,816 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:50,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:50,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:50,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:50,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:50,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:50,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:50,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:50,840 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:51,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:51,281 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:15:51,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:51,281 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:51,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:51,282 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:15:51,282 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:15:51,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:15:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 32. [2018-09-28 10:15:51,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:51,467 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:51,468 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:51,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:51,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:51,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:51,468 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:51,468 INFO L423 AbstractCegarLoop]: === Iteration 213 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:51,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:51,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1028053629, now seen corresponding path program 199 times [2018-09-28 10:15:51,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:51,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:51,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:51,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:51,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:51,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:51,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:51,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:51,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:51,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:51,565 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:51,565 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:51,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:51,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:51,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:51,565 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:52,020 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:15:52,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:52,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:52,021 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:15:52,021 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:15:52,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:15:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 30. [2018-09-28 10:15:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:52,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:52,203 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:52,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:52,203 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:52,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:52,204 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:52,204 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:52,204 INFO L423 AbstractCegarLoop]: === Iteration 214 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:52,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:52,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1029898749, now seen corresponding path program 200 times [2018-09-28 10:15:52,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:52,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:52,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:52,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:52,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:52,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:52,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:52,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:52,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:52,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:52,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:52,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:52,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:52,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:52,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:52,310 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:52,738 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:15:52,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:52,738 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:52,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:52,739 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:15:52,739 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:15:52,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:52,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:15:52,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 32. [2018-09-28 10:15:52,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:52,927 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:52,927 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:52,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:52,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:52,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:52,927 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:52,927 INFO L423 AbstractCegarLoop]: === Iteration 215 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:52,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:52,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1029900671, now seen corresponding path program 201 times [2018-09-28 10:15:52,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:52,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:52,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:52,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:52,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:52,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:52,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:53,004 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:53,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:53,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:53,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:53,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:53,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:53,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:53,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:53,028 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:53,422 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:15:53,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:53,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:53,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:53,422 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:15:53,423 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:15:53,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:15:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 26. [2018-09-28 10:15:53,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:15:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:15:53,578 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:15:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:53,578 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:15:53,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:15:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:53,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:53,579 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:53,579 INFO L423 AbstractCegarLoop]: === Iteration 216 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:53,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:53,579 INFO L82 PathProgramCache]: Analyzing trace with hash -66897285, now seen corresponding path program 202 times [2018-09-28 10:15:53,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:53,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:53,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:53,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:53,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:53,676 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:53,676 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:53,676 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:53,685 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:53,692 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:53,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:53,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:53,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:53,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:53,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:53,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:53,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:53,714 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:15:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:54,120 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:15:54,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:54,120 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:54,121 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:15:54,121 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:15:54,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:54,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:15:54,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:15:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:54,314 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:54,314 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:54,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:54,314 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:54,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:54,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:54,315 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:54,315 INFO L423 AbstractCegarLoop]: === Iteration 217 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:54,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:54,315 INFO L82 PathProgramCache]: Analyzing trace with hash -66895363, now seen corresponding path program 203 times [2018-09-28 10:15:54,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:54,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:54,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:54,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:54,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:54,390 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:54,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:54,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:54,398 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:54,411 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:54,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:54,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:54,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:54,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:54,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:54,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:54,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:54,436 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:54,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:54,825 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:15:54,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:54,825 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:54,825 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:15:54,825 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:15:54,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:15:55,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-28 10:15:55,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:55,006 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:55,006 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:55,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:55,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:55,007 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:55,007 INFO L423 AbstractCegarLoop]: === Iteration 218 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:55,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:55,007 INFO L82 PathProgramCache]: Analyzing trace with hash -65050243, now seen corresponding path program 204 times [2018-09-28 10:15:55,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:55,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:55,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:55,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:55,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:55,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:55,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:55,275 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:55,284 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:55,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:55,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:55,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:55,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:55,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:55,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:55,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:55,308 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:55,708 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:15:55,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:55,708 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:55,709 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:15:55,709 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:15:55,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:55,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:15:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:15:55,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:55,895 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:55,895 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:55,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:55,895 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:55,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:55,895 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:55,896 INFO L423 AbstractCegarLoop]: === Iteration 219 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:55,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:55,896 INFO L82 PathProgramCache]: Analyzing trace with hash -65048321, now seen corresponding path program 205 times [2018-09-28 10:15:55,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:55,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:55,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:55,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:55,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:55,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:55,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:55,968 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:55,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:56,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:56,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:56,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:56,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:56,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:56,001 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:56,405 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:15:56,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:56,405 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:56,406 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:15:56,406 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:15:56,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:15:56,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 28. [2018-09-28 10:15:56,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:15:56,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:15:56,586 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:15:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:56,586 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:15:56,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:56,587 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:15:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:56,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:56,587 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:56,587 INFO L423 AbstractCegarLoop]: === Iteration 220 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:56,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:56,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1708110077, now seen corresponding path program 206 times [2018-09-28 10:15:56,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:56,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:56,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:56,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:15:56,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:56,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:56,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:56,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:15:56,670 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:15:56,671 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:56,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:56,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:56,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:56,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:56,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:56,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:56,694 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:15:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:57,060 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:57,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:57,060 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:57,060 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:57,060 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:57,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:57,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-28 10:15:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:57,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:57,255 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:57,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:57,255 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:57,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:57,255 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:57,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:57,255 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:57,256 INFO L423 AbstractCegarLoop]: === Iteration 221 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:57,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:57,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1708111999, now seen corresponding path program 207 times [2018-09-28 10:15:57,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:57,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:57,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:57,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:57,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:57,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:57,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:57,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:15:57,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:15:57,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:57,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:57,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:57,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:57,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:57,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:57,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:57,379 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:57,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:57,754 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:15:57,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:57,754 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:57,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:57,755 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:15:57,755 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:15:57,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:15:57,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:15:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:15:57,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:15:57,939 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:15:57,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:57,940 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:15:57,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:57,940 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:15:57,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:57,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:57,940 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:57,940 INFO L423 AbstractCegarLoop]: === Iteration 222 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:57,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:57,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1709957119, now seen corresponding path program 208 times [2018-09-28 10:15:57,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:57,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:57,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:57,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:57,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:58,004 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:58,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:58,012 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:15:58,017 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:15:58,017 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:58,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:58,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:58,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:58,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:58,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:58,041 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:15:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:58,402 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:15:58,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:58,402 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:58,403 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:15:58,403 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:15:58,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:58,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:15:58,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:15:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:58,601 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:58,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:58,601 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:58,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:58,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:58,601 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:15:58,601 INFO L423 AbstractCegarLoop]: === Iteration 223 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:58,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:58,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1709959041, now seen corresponding path program 209 times [2018-09-28 10:15:58,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:58,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:58,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:58,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:58,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:58,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:58,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:58,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:15:58,723 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:15:58,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:58,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:58,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:58,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:58,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:58,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:58,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:58,747 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:15:59,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:59,088 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:15:59,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:59,088 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:59,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:59,089 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:15:59,089 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:15:59,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:15:59,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2018-09-28 10:15:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:15:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:15:59,211 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 17 [2018-09-28 10:15:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:59,211 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:15:59,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:15:59,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:59,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:59,211 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:15:59,211 INFO L423 AbstractCegarLoop]: === Iteration 224 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:59,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:59,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2034826247, now seen corresponding path program 210 times [2018-09-28 10:15:59,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:59,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:59,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:59,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:59,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:15:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:59,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:15:59,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:15:59,280 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:15:59,290 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:15:59,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:15:59,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:15:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:15:59,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:15:59,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:15:59,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:15:59,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:15:59,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:59,314 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 10 states. [2018-09-28 10:15:59,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:15:59,730 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:15:59,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:15:59,730 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:15:59,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:15:59,731 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:15:59,731 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:15:59,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:15:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:15:59,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:15:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:15:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:15:59,939 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:15:59,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:15:59,939 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:15:59,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:15:59,939 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:15:59,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:15:59,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:15:59,939 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:15:59,940 INFO L423 AbstractCegarLoop]: === Iteration 225 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:15:59,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:15:59,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2034824325, now seen corresponding path program 211 times [2018-09-28 10:15:59,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:15:59,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:15:59,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:59,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:15:59,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:15:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:00,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:00,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:00,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:00,021 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:00,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:00,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:00,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:00,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:00,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:00,045 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:00,456 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:16:00,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:00,456 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:00,457 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:16:00,457 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:16:00,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:16:00,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:16:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:00,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:00,659 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:16:00,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:00,659 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:00,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:00,659 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:00,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:00,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:00,660 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:00,660 INFO L423 AbstractCegarLoop]: === Iteration 226 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:00,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:00,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2032979205, now seen corresponding path program 212 times [2018-09-28 10:16:00,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:00,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:00,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:00,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:00,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:00,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:00,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:00,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:00,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:00,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:00,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:00,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:00,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:00,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:00,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:00,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:00,768 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:16:01,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:01,186 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:16:01,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:01,186 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:01,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:01,187 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:16:01,187 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:16:01,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:16:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:16:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:01,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:01,392 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:01,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:01,393 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:01,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:01,393 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:01,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:01,393 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:01,393 INFO L423 AbstractCegarLoop]: === Iteration 227 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:01,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:01,393 INFO L82 PathProgramCache]: Analyzing trace with hash -2032977283, now seen corresponding path program 213 times [2018-09-28 10:16:01,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:01,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:01,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:01,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:01,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:01,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:01,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:01,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:01,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:01,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:16:01,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:01,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:01,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:01,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:01,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:01,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:01,514 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:01,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:01,937 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:16:01,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:01,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:01,939 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:16:01,939 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:16:01,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:16:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-28 10:16:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:16:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:16:02,128 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:16:02,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:02,128 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:16:02,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:16:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:02,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:02,129 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:02,129 INFO L423 AbstractCegarLoop]: === Iteration 228 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:02,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash -259818885, now seen corresponding path program 214 times [2018-09-28 10:16:02,129 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:02,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:02,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:02,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:02,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:02,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:02,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:02,198 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:02,204 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:02,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:02,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:02,207 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:02,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:02,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:02,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:02,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:02,238 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:16:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:02,675 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:16:02,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:02,675 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:02,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:02,676 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:16:02,676 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:16:02,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:02,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:16:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:16:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:02,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:02,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:02,890 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:02,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:02,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:02,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:02,890 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:02,890 INFO L423 AbstractCegarLoop]: === Iteration 229 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:02,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:02,890 INFO L82 PathProgramCache]: Analyzing trace with hash -259816963, now seen corresponding path program 215 times [2018-09-28 10:16:02,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:02,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:02,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:02,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:02,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:02,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:02,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:02,956 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:02,965 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:16:02,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:02,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:02,968 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:02,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:02,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:02,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:02,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:02,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:02,989 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:03,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:03,387 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:16:03,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:03,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:03,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:03,387 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:16:03,388 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:16:03,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:16:03,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-28 10:16:03,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:03,594 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:16:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:03,594 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:03,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:03,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:03,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:03,594 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:03,594 INFO L423 AbstractCegarLoop]: === Iteration 230 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:03,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:03,594 INFO L82 PathProgramCache]: Analyzing trace with hash -257971843, now seen corresponding path program 216 times [2018-09-28 10:16:03,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:03,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:03,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:03,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:03,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:03,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:03,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:03,667 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:03,674 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:16:03,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:03,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:03,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:03,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:03,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:03,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:03,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:03,699 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:16:04,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:04,063 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:16:04,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:04,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:04,063 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:16:04,063 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:16:04,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:04,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:16:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-28 10:16:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:04,275 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:04,275 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:04,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:04,276 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:04,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:04,276 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:16:04,276 INFO L423 AbstractCegarLoop]: === Iteration 231 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:04,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:04,276 INFO L82 PathProgramCache]: Analyzing trace with hash -257969921, now seen corresponding path program 217 times [2018-09-28 10:16:04,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:04,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:04,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:04,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:04,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:04,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:04,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:04,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:04,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:04,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:04,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:04,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:04,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:04,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:04,385 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:04,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:04,750 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:16:04,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:04,750 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:04,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:04,751 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:16:04,751 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:16:04,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:04,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:16:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2018-09-28 10:16:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:16:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:16:04,925 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:16:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:04,925 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:16:04,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:16:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:04,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:04,925 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:04,925 INFO L423 AbstractCegarLoop]: === Iteration 232 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:04,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:04,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1354767877, now seen corresponding path program 218 times [2018-09-28 10:16:04,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:04,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:04,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:04,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:04,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:04,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:04,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:04,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:05,003 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:05,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:05,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:05,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:05,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:05,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:05,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:05,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:05,027 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:16:05,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:05,499 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:16:05,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:05,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:05,500 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:16:05,500 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:16:05,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:05,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:16:05,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:16:05,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:05,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:05,736 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:05,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:05,736 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:05,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:05,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:05,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:05,736 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:05,737 INFO L423 AbstractCegarLoop]: === Iteration 233 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:05,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:05,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1354765955, now seen corresponding path program 219 times [2018-09-28 10:16:05,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:05,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:05,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:05,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:05,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:05,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:05,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:05,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:05,807 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:05,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:16:05,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:05,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:05,820 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:05,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:05,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:05,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:05,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:05,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:05,853 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:06,893 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:16:06,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:06,893 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:06,893 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:16:06,894 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:16:06,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:06,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:16:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2018-09-28 10:16:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:07,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:07,274 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:16:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:07,274 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:07,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:07,274 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:07,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:07,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:07,274 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:07,275 INFO L423 AbstractCegarLoop]: === Iteration 234 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:07,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:07,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1352920835, now seen corresponding path program 220 times [2018-09-28 10:16:07,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:07,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:07,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:07,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:07,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:07,478 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:07,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:07,486 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:07,491 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:07,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:07,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:07,515 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:07,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:07,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:07,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:07,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:07,516 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:16:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:07,950 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:16:07,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:07,950 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:07,951 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:16:07,951 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:16:07,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:16:08,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:16:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:08,161 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:08,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:08,162 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:08,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:08,162 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:08,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:08,162 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:16:08,162 INFO L423 AbstractCegarLoop]: === Iteration 235 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:08,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1352918913, now seen corresponding path program 221 times [2018-09-28 10:16:08,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:08,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:08,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:08,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:08,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:08,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:08,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:08,234 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:08,243 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:16:08,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:08,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:08,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:08,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:08,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:08,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:08,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:08,267 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:08,665 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:16:08,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:08,665 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:08,665 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:16:08,665 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:16:08,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:08,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:16:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 28. [2018-09-28 10:16:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:16:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:16:08,863 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:16:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:08,863 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:16:08,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:08,864 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:16:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:08,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:08,864 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:08,864 INFO L423 AbstractCegarLoop]: === Iteration 236 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:08,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:08,864 INFO L82 PathProgramCache]: Analyzing trace with hash 420239485, now seen corresponding path program 222 times [2018-09-28 10:16:08,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:08,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:08,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:08,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:08,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:09,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:09,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:09,487 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:09,497 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:16:09,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:09,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:09,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:09,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:09,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:09,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:09,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:09,527 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:16:09,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:09,927 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:16:09,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:09,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:09,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:09,928 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:16:09,928 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:16:09,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:09,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:16:10,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:16:10,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:10,140 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:10,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:10,140 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:10,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:10,140 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:10,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:10,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:10,140 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:16:10,140 INFO L423 AbstractCegarLoop]: === Iteration 237 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:10,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:10,140 INFO L82 PathProgramCache]: Analyzing trace with hash 420241407, now seen corresponding path program 223 times [2018-09-28 10:16:10,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:10,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:10,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:10,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:10,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:10,200 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:10,200 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:10,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:10,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:10,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:10,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:10,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:10,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:10,238 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:10,634 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:16:10,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:10,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:10,634 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:16:10,634 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:16:10,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:16:10,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-28 10:16:10,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:10,840 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:16:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:10,840 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:10,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:10,840 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:10,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:10,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:10,841 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:16:10,841 INFO L423 AbstractCegarLoop]: === Iteration 238 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:10,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:10,841 INFO L82 PathProgramCache]: Analyzing trace with hash 422086527, now seen corresponding path program 224 times [2018-09-28 10:16:10,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:10,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:10,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:10,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:10,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:10,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:10,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:10,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:10,923 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:10,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:10,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:10,946 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:10,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:10,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:10,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:10,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:10,947 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:16:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:11,325 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:16:11,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:11,325 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:11,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:11,326 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:16:11,326 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:16:11,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:16:11,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-28 10:16:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:11,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:11,539 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:11,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:11,539 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:11,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:11,539 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:11,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:11,539 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:11,539 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:16:11,540 INFO L423 AbstractCegarLoop]: === Iteration 239 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:11,540 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:11,540 INFO L82 PathProgramCache]: Analyzing trace with hash 422088449, now seen corresponding path program 225 times [2018-09-28 10:16:11,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:11,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:11,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:11,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:11,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:11,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:11,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:11,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:11,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:16:11,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:11,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:11,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:11,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:11,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:11,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:11,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:11,640 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:12,004 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:16:12,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:12,004 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:12,005 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:16:12,005 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:16:12,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:16:12,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2018-09-28 10:16:12,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:16:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:16:12,163 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 17 [2018-09-28 10:16:12,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:12,163 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:16:12,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:16:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:12,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:12,164 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:12,164 INFO L423 AbstractCegarLoop]: === Iteration 240 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:12,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:12,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1333761669, now seen corresponding path program 226 times [2018-09-28 10:16:12,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:12,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:12,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:12,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:12,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:12,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:12,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:12,234 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:12,240 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:12,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:12,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:12,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:12,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:12,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:12,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:12,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:12,264 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 10 states. [2018-09-28 10:16:12,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:12,649 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:16:12,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:12,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:12,650 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:16:12,650 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:16:12,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:16:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-28 10:16:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:12,871 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:12,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:12,871 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:12,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:12,871 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:12,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:12,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:12,871 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:12,872 INFO L423 AbstractCegarLoop]: === Iteration 241 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:12,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:12,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1333759747, now seen corresponding path program 227 times [2018-09-28 10:16:12,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:12,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:12,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:12,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:12,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:12,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:12,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:12,943 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:12,952 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:16:12,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:12,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:12,975 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:12,975 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:12,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:12,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:12,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:12,976 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:13,373 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:16:13,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:13,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:13,374 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:16:13,374 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:16:13,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:16:13,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:16:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:13,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:13,585 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:16:13,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:13,585 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:13,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:13,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:13,585 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:13,585 INFO L423 AbstractCegarLoop]: === Iteration 242 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:13,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:13,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1331914627, now seen corresponding path program 228 times [2018-09-28 10:16:13,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:13,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:13,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:13,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:13,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:13,649 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:13,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:13,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:13,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:13,668 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:16:13,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:13,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:13,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:13,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:13,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:13,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:13,692 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:16:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:14,063 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:16:14,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:14,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:14,063 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:16:14,063 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:16:14,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:16:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-28 10:16:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:14,280 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:14,280 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:14,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:14,281 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:14,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:14,281 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:16:14,281 INFO L423 AbstractCegarLoop]: === Iteration 243 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:14,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:14,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1331912705, now seen corresponding path program 229 times [2018-09-28 10:16:14,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:14,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:14,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:14,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:14,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:14,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:14,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:14,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:14,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:14,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:14,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:14,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:14,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:14,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:14,379 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:14,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:14,764 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:16:14,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:14,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:14,765 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:16:14,765 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:16:14,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:16:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2018-09-28 10:16:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:16:14,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:16:14,963 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:16:14,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:14,963 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:16:14,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:16:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:14,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:14,963 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:14,964 INFO L423 AbstractCegarLoop]: === Iteration 244 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:14,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:14,964 INFO L82 PathProgramCache]: Analyzing trace with hash 441245693, now seen corresponding path program 230 times [2018-09-28 10:16:14,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:14,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:14,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:14,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:14,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:15,026 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:15,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:15,032 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:15,037 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:15,037 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:15,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:15,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:15,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:15,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:15,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:15,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:15,061 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:16:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:15,445 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:16:15,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:15,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:15,445 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:16:15,445 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:16:15,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:15,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:16:15,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2018-09-28 10:16:15,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:15,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:15,672 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:15,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:15,672 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:15,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:15,672 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:15,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:15,672 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:16:15,672 INFO L423 AbstractCegarLoop]: === Iteration 245 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:15,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash 441247615, now seen corresponding path program 231 times [2018-09-28 10:16:15,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:15,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:15,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:15,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:15,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:15,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:15,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:15,739 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:15,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:15,771 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:16:15,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:15,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:15,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:15,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:15,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:15,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:15,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:15,806 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:16,281 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:16:16,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:16,281 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:16,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:16,282 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:16:16,282 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:16:16,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:16:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2018-09-28 10:16:16,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:16,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:16,497 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:16:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:16,497 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:16,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:16,497 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:16,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:16,497 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:16,497 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:16:16,497 INFO L423 AbstractCegarLoop]: === Iteration 246 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:16,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:16,497 INFO L82 PathProgramCache]: Analyzing trace with hash 443092735, now seen corresponding path program 232 times [2018-09-28 10:16:16,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:16,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:16,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:16,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:16,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:16,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:16,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:16,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:16,574 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:16,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:16,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:16,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:16,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:16,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:16,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:16,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:16,598 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:16:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:16,973 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:16:16,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:16,973 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:16,974 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:16:16,974 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:16:16,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:16:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2018-09-28 10:16:17,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:17,198 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:17,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:17,198 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:17,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:17,198 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:17,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:17,198 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:16:17,199 INFO L423 AbstractCegarLoop]: === Iteration 247 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:17,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:17,199 INFO L82 PathProgramCache]: Analyzing trace with hash 443094657, now seen corresponding path program 233 times [2018-09-28 10:16:17,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:17,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:17,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:17,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:17,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:17,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:17,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:17,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:17,268 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:17,276 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:16:17,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:17,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:17,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:17,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:17,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:17,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:17,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:17,300 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:17,664 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:16:17,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:17,664 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:17,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:17,665 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:16:17,665 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:16:17,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:16:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2018-09-28 10:16:17,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:16:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:16:17,849 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 17 [2018-09-28 10:16:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:17,849 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:16:17,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:16:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:17,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:17,850 INFO L375 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1] [2018-09-28 10:16:17,850 INFO L423 AbstractCegarLoop]: === Iteration 248 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:17,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:17,850 INFO L82 PathProgramCache]: Analyzing trace with hash -653703299, now seen corresponding path program 234 times [2018-09-28 10:16:17,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:17,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:17,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:17,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:17,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:17,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:17,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:17,924 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:17,933 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:16:17,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:17,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:17,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:17,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:17,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:17,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:17,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:17,959 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 10 states. [2018-09-28 10:16:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:18,302 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:16:18,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:18,302 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:18,303 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:16:18,303 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:16:18,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:18,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:16:18,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-28 10:16:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:18,529 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:18,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:18,530 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:18,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:18,530 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:18,530 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:16:18,530 INFO L423 AbstractCegarLoop]: === Iteration 249 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:18,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:18,530 INFO L82 PathProgramCache]: Analyzing trace with hash -653701377, now seen corresponding path program 235 times [2018-09-28 10:16:18,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:18,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:18,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:18,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:18,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:18,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:18,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:18,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:18,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:18,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:18,627 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:18,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:18,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:18,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:18,628 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:18,961 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:16:18,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:18,961 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:18,961 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:16:18,961 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:16:18,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:16:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2018-09-28 10:16:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:19,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:19,182 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:16:19,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:19,182 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:19,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:19,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:19,183 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:16:19,183 INFO L423 AbstractCegarLoop]: === Iteration 250 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:19,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:19,183 INFO L82 PathProgramCache]: Analyzing trace with hash -651856257, now seen corresponding path program 236 times [2018-09-28 10:16:19,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:19,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:19,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:19,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:19,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:19,276 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:19,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:19,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:19,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:19,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:19,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:19,328 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:19,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:19,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:19,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:19,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:19,329 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:16:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:19,710 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:16:19,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:19,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:19,711 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:16:19,711 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:16:19,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:16:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-28 10:16:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:19,939 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:19,939 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:19,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:19,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:19,939 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:16:19,939 INFO L423 AbstractCegarLoop]: === Iteration 251 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:19,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:19,940 INFO L82 PathProgramCache]: Analyzing trace with hash -651854335, now seen corresponding path program 237 times [2018-09-28 10:16:19,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:19,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:19,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:19,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:19,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:20,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:20,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:20,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:20,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:20,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-09-28 10:16:20,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:20,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:20,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:20,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:20,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:20,060 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:20,395 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:16:20,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:20,395 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:20,396 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:16:20,396 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:16:20,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:20,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:16:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-09-28 10:16:20,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:16:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:16:20,609 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 17 [2018-09-28 10:16:20,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:20,609 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:16:20,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:20,609 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:16:20,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:20,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:20,609 INFO L375 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1] [2018-09-28 10:16:20,609 INFO L423 AbstractCegarLoop]: === Iteration 252 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:20,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1121304063, now seen corresponding path program 238 times [2018-09-28 10:16:20,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:20,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:20,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:20,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:20,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:20,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:20,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:20,681 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:20,687 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:20,688 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:20,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:20,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:20,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:20,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:20,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:20,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:20,713 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 10 states. [2018-09-28 10:16:21,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:21,020 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:16:21,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:21,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:21,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:21,021 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:16:21,021 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:16:21,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:16:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2018-09-28 10:16:21,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:21,245 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:21,245 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:21,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:21,246 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:21,246 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:21,246 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:16:21,246 INFO L423 AbstractCegarLoop]: === Iteration 253 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:21,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1121305985, now seen corresponding path program 239 times [2018-09-28 10:16:21,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:21,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:21,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:21,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:21,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:21,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:21,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:21,357 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:21,364 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-09-28 10:16:21,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:21,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:21,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:21,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:21,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:21,388 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:21,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:21,706 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:16:21,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:21,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:21,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:21,707 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:16:21,707 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:16:21,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:21,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:16:21,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2018-09-28 10:16:21,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:21,931 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 17 [2018-09-28 10:16:21,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:21,931 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:21,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:21,931 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:21,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:21,931 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1] [2018-09-28 10:16:21,932 INFO L423 AbstractCegarLoop]: === Iteration 254 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:21,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1123151105, now seen corresponding path program 240 times [2018-09-28 10:16:21,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:21,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:21,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:21,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:21,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:21,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:21,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:22,006 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:22,014 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-28 10:16:22,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:22,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:22,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:22,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:22,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:22,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:22,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:22,039 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 10 states. [2018-09-28 10:16:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:22,342 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2018-09-28 10:16:22,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:22,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:22,343 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:16:22,343 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:16:22,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:16:22,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2018-09-28 10:16:22,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:22,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:22,573 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 17 [2018-09-28 10:16:22,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:22,573 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:22,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:22,573 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:22,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:16:22,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:22,573 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1] [2018-09-28 10:16:22,574 INFO L423 AbstractCegarLoop]: === Iteration 255 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:22,574 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:22,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1123153027, now seen corresponding path program 7 times [2018-09-28 10:16:22,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:22,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:22,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:22,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:22,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:22,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:22,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:22,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:22,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:22,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:22,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:16:22,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:16:22,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:16:22,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:22,779 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 10 states. [2018-09-28 10:16:23,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:23,062 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2018-09-28 10:16:23,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:16:23,062 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-09-28 10:16:23,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:23,062 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:16:23,062 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:16:23,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-28 10:16:23,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:16:23,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 20. [2018-09-28 10:16:23,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:16:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 28 transitions. [2018-09-28 10:16:23,201 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 28 transitions. Word has length 17 [2018-09-28 10:16:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:23,201 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 28 transitions. [2018-09-28 10:16:23,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:16:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 28 transitions. [2018-09-28 10:16:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:23,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:23,202 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1] [2018-09-28 10:16:23,202 INFO L423 AbstractCegarLoop]: === Iteration 256 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:23,202 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:23,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1610002744, now seen corresponding path program 8 times [2018-09-28 10:16:23,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:23,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:23,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:23,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:23,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:23,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:23,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:23,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:23,308 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:23,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:23,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:23,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:23,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:23,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:23,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:23,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:23,331 INFO L87 Difference]: Start difference. First operand 20 states and 28 transitions. Second operand 11 states. [2018-09-28 10:16:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:23,920 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:16:23,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:23,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:23,921 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:16:23,922 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:16:23,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:16:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:16:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:24,214 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:24,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:24,214 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:24,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:24,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:24,215 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:16:24,215 INFO L423 AbstractCegarLoop]: === Iteration 257 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:24,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:24,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1610004666, now seen corresponding path program 241 times [2018-09-28 10:16:24,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:24,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:24,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:24,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:24,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:24,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:24,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:24,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:24,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:24,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:24,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:24,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:24,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:24,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:24,327 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:24,919 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:16:24,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:24,919 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:24,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:24,920 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:16:24,920 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:16:24,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:24,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:16:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:16:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:25,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:25,197 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:16:25,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:25,197 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:25,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:25,197 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:25,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:25,197 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:16:25,198 INFO L423 AbstractCegarLoop]: === Iteration 258 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:25,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:25,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1611849786, now seen corresponding path program 242 times [2018-09-28 10:16:25,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:25,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:25,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:25,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:25,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:25,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:25,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:25,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:25,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:25,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:25,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:25,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:25,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:25,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:25,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:25,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:25,304 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:16:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:25,891 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:16:25,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:25,891 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:25,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:25,892 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:16:25,892 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:16:25,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:25,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:16:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:16:26,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:26,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:26,170 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:26,170 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:26,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:26,170 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:26,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:26,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:26,171 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:26,171 INFO L423 AbstractCegarLoop]: === Iteration 259 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:26,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:26,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1611851708, now seen corresponding path program 243 times [2018-09-28 10:16:26,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:26,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:26,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:26,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:26,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:26,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:26,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:26,252 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:26,263 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:16:26,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:26,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:26,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:26,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:26,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:26,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:26,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:26,288 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:26,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:26,820 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:16:26,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:26,820 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:26,820 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:16:26,820 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:16:26,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:26,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:16:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-28 10:16:27,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:27,073 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:16:27,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:27,074 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:27,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:27,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:27,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:27,074 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:16:27,074 INFO L423 AbstractCegarLoop]: === Iteration 260 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:27,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:27,074 INFO L82 PathProgramCache]: Analyzing trace with hash -909957190, now seen corresponding path program 244 times [2018-09-28 10:16:27,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:27,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:27,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:27,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:27,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:27,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:27,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:27,150 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:27,158 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:27,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:27,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:27,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:27,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:27,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:27,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:27,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:27,182 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:16:27,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:27,788 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:16:27,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:27,788 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:27,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:27,788 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:16:27,788 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:16:27,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:16:28,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:16:28,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:28,079 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:28,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:28,080 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:28,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:28,080 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:28,080 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:28,080 INFO L423 AbstractCegarLoop]: === Iteration 261 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:28,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:28,080 INFO L82 PathProgramCache]: Analyzing trace with hash -909955268, now seen corresponding path program 245 times [2018-09-28 10:16:28,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:28,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:28,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:28,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:28,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:28,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:28,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:28,155 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:28,166 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:16:28,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:28,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:28,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:28,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:28,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:28,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:28,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:28,190 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:28,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:28,791 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:16:28,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:28,791 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:28,792 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:16:28,792 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:16:28,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:16:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:16:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:29,062 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:16:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:29,062 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:29,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:29,062 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:29,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:29,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:29,063 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:29,063 INFO L423 AbstractCegarLoop]: === Iteration 262 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:29,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:29,063 INFO L82 PathProgramCache]: Analyzing trace with hash -908110148, now seen corresponding path program 246 times [2018-09-28 10:16:29,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:29,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:29,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:29,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:29,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:29,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:29,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:29,169 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:29,183 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:16:29,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:29,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:29,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:29,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:29,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:29,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:29,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:29,209 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:16:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:29,764 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:16:29,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:29,764 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:29,765 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:16:29,765 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:16:29,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:16:30,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:16:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:30,059 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:30,060 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:30,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:30,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:30,060 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:30,060 INFO L423 AbstractCegarLoop]: === Iteration 263 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:30,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash -908108226, now seen corresponding path program 247 times [2018-09-28 10:16:30,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:30,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:30,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:30,061 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:30,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:30,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:30,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:30,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:30,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:30,176 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:30,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:30,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:30,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:30,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:30,177 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:30,745 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:16:30,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:30,745 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:30,746 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:16:30,746 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:16:30,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:16:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-28 10:16:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:16:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:16:30,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:16:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:30,983 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:16:30,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:16:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:30,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:30,983 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:16:30,984 INFO L423 AbstractCegarLoop]: === Iteration 264 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:30,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:30,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2004906182, now seen corresponding path program 248 times [2018-09-28 10:16:30,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:30,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:30,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:30,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:30,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:31,052 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:31,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:31,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:31,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:31,066 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:31,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:31,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:31,089 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:31,089 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:31,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:31,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:31,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:31,090 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:16:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:31,640 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:16:31,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:31,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:31,640 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:16:31,640 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:16:31,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:16:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:16:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:31,922 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:31,922 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:31,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:31,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:31,923 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:31,923 INFO L423 AbstractCegarLoop]: === Iteration 265 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:31,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2004904260, now seen corresponding path program 249 times [2018-09-28 10:16:31,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:31,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:31,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:31,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:31,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:31,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:31,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:32,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:32,013 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:16:32,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:32,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:32,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:32,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:32,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:32,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:32,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:32,044 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:32,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:32,585 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:16:32,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:32,585 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:32,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:32,586 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:16:32,586 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:16:32,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:32,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:16:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:16:32,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:32,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:32,866 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:16:32,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:32,866 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:32,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:32,866 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:32,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:32,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:32,866 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:32,866 INFO L423 AbstractCegarLoop]: === Iteration 266 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:32,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:32,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2003059140, now seen corresponding path program 250 times [2018-09-28 10:16:32,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:32,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:32,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:32,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:32,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:32,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:32,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:32,943 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:32,949 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:32,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:32,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:32,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:32,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:32,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:32,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:32,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:32,971 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:16:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:33,527 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:16:33,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:33,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:33,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:33,528 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:16:33,528 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:16:33,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:33,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:16:33,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:16:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:33,809 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:33,809 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:33,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:33,809 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:33,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:33,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:33,810 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:33,810 INFO L423 AbstractCegarLoop]: === Iteration 267 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:33,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:33,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2003057218, now seen corresponding path program 251 times [2018-09-28 10:16:33,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:33,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:33,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:33,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:33,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:33,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:33,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:33,919 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:33,929 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:16:33,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:33,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:33,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:33,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:33,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:33,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:33,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:33,952 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:34,489 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:16:34,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:34,489 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:34,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:34,489 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:16:34,489 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:16:34,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:34,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:16:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-28 10:16:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:34,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:16:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:34,747 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:34,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:34,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:34,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:34,747 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:34,747 INFO L423 AbstractCegarLoop]: === Iteration 268 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:34,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:34,748 INFO L82 PathProgramCache]: Analyzing trace with hash -229898820, now seen corresponding path program 252 times [2018-09-28 10:16:34,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:34,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:34,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:34,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:34,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:34,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:34,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:34,837 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:34,847 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:16:34,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:34,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:34,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:34,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:34,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:34,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:34,871 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:16:35,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:35,391 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:16:35,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:35,391 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:35,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:35,392 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:16:35,392 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:16:35,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:16:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-28 10:16:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:35,676 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:35,676 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:35,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:35,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:35,677 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:35,677 INFO L423 AbstractCegarLoop]: === Iteration 269 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:35,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:35,677 INFO L82 PathProgramCache]: Analyzing trace with hash -229896898, now seen corresponding path program 253 times [2018-09-28 10:16:35,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:35,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:35,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:35,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:35,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:35,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:35,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:35,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:35,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:35,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:35,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:35,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:35,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:35,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:35,812 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:36,324 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:16:36,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:36,324 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:36,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:36,325 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:16:36,325 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:16:36,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:16:36,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:16:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:36,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:36,601 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:16:36,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:36,601 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:36,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:36,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:36,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:36,601 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:36,602 INFO L423 AbstractCegarLoop]: === Iteration 270 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:36,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:36,602 INFO L82 PathProgramCache]: Analyzing trace with hash -228051778, now seen corresponding path program 254 times [2018-09-28 10:16:36,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:36,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:36,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:36,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:36,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:36,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:36,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:36,692 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:36,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:36,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:36,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:36,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:36,732 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:36,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:36,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:36,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:36,732 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:16:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:37,276 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:16:37,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:37,276 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:37,277 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:16:37,277 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:16:37,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:37,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:16:37,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:16:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:37,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:37,558 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:37,559 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:37,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:37,559 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:37,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:37,559 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:16:37,559 INFO L423 AbstractCegarLoop]: === Iteration 271 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:37,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:37,559 INFO L82 PathProgramCache]: Analyzing trace with hash -228049856, now seen corresponding path program 255 times [2018-09-28 10:16:37,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:37,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:37,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:37,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:37,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:37,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:37,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:37,635 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:37,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:16:37,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:37,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:37,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:37,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:37,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:37,669 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:38,186 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:16:38,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:38,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:38,187 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:16:38,187 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:16:38,187 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:38,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:16:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:16:38,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:16:38,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:16:38,459 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-28 10:16:38,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:38,459 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:16:38,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:38,459 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:16:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:38,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:38,459 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:16:38,460 INFO L423 AbstractCegarLoop]: === Iteration 272 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:38,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:38,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1983899974, now seen corresponding path program 256 times [2018-09-28 10:16:38,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:38,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:38,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:38,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:38,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:38,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:38,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:38,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:38,544 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:38,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:38,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:38,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:38,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:38,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:38,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:38,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:38,566 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-28 10:16:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:39,218 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:16:39,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:39,218 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:39,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:39,219 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:16:39,219 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:16:39,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:39,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:16:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:16:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:39,512 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:39,512 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:39,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:39,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:39,513 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:39,513 INFO L423 AbstractCegarLoop]: === Iteration 273 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:39,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:39,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1983898052, now seen corresponding path program 257 times [2018-09-28 10:16:39,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:39,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:39,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:39,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:39,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:39,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:39,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:39,660 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:39,676 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:16:39,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:39,677 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:39,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:39,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:39,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:39,699 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:40,316 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:16:40,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:40,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:40,317 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:16:40,317 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:16:40,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:40,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:16:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:16:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:40,601 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:16:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:40,601 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:40,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:40,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:40,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:40,602 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:40,602 INFO L423 AbstractCegarLoop]: === Iteration 274 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:40,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:40,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1982052932, now seen corresponding path program 258 times [2018-09-28 10:16:40,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:40,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:40,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:40,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:40,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:40,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:40,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:40,693 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:40,705 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:16:40,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:40,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:40,709 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:40,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:40,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:40,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:40,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:40,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:40,730 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:16:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:41,351 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:16:41,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:41,351 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:41,351 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:16:41,351 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:16:41,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:41,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:16:41,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:16:41,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:41,641 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:41,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:41,641 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:41,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:41,641 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:41,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:41,641 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:41,641 INFO L423 AbstractCegarLoop]: === Iteration 275 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:41,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:41,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1982051010, now seen corresponding path program 259 times [2018-09-28 10:16:41,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:41,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:41,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:41,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:41,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:41,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:41,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:41,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:41,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:41,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:41,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:41,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:41,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:41,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:41,762 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:42,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:42,347 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:16:42,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:42,347 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:42,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:42,348 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:16:42,348 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:16:42,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:42,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:16:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-28 10:16:42,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:42,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:42,611 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:16:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:42,612 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:42,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:42,612 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:42,612 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:42,612 INFO L423 AbstractCegarLoop]: === Iteration 276 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:42,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:42,612 INFO L82 PathProgramCache]: Analyzing trace with hash -208892612, now seen corresponding path program 260 times [2018-09-28 10:16:42,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:42,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:42,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:42,613 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:42,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:42,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:42,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:42,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:42,697 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:42,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:42,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:42,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:42,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:42,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:42,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:42,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:42,722 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:16:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:43,364 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:16:43,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:43,364 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:43,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:43,365 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:16:43,365 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:16:43,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:16:43,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:16:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:43,655 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:43,655 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:43,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:43,656 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:43,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:43,656 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:43,656 INFO L423 AbstractCegarLoop]: === Iteration 277 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:43,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:43,656 INFO L82 PathProgramCache]: Analyzing trace with hash -208890690, now seen corresponding path program 261 times [2018-09-28 10:16:43,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:43,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:43,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:43,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:43,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:43,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:43,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:43,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:43,744 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:16:43,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:43,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:43,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:43,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:43,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:43,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:43,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:43,767 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:44,414 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:16:44,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:44,414 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:44,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:44,415 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:16:44,415 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:16:44,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:44,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:16:44,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:16:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:44,706 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:16:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:44,706 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:44,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:44,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:44,707 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:44,707 INFO L423 AbstractCegarLoop]: === Iteration 278 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:44,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:44,707 INFO L82 PathProgramCache]: Analyzing trace with hash -207045570, now seen corresponding path program 262 times [2018-09-28 10:16:44,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:44,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:44,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:44,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:44,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:44,760 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:44,760 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:44,768 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:44,774 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:44,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:44,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:44,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:44,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:44,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:44,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:44,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:44,798 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:16:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:45,405 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:16:45,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:45,405 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:45,405 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:16:45,405 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:16:45,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:16:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:16:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:45,703 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:45,703 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:45,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:45,703 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:45,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:45,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:45,703 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:16:45,704 INFO L423 AbstractCegarLoop]: === Iteration 279 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:45,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:45,704 INFO L82 PathProgramCache]: Analyzing trace with hash -207043648, now seen corresponding path program 263 times [2018-09-28 10:16:45,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:45,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:45,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:45,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:45,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:45,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:45,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:45,782 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:45,793 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:16:45,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:45,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:45,796 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:45,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:45,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:45,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:45,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:45,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:45,817 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:46,423 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:16:46,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:46,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:46,424 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:16:46,424 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:16:46,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:16:46,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-28 10:16:46,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:16:46,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:16:46,671 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:16:46,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:46,671 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:16:46,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:46,671 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:16:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:46,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:46,671 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:46,671 INFO L423 AbstractCegarLoop]: === Iteration 280 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:46,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:46,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1303841604, now seen corresponding path program 264 times [2018-09-28 10:16:46,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:46,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:46,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:46,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:46,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:46,739 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:46,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:46,746 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:46,760 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:16:46,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:46,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:46,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:46,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:46,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:46,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:46,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:46,784 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:16:47,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:47,386 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:16:47,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:47,386 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:47,387 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:16:47,387 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:16:47,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:16:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:16:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:47,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:47,689 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:47,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:47,689 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:47,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:47,690 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:47,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:47,690 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:47,690 INFO L423 AbstractCegarLoop]: === Iteration 281 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:47,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:47,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1303839682, now seen corresponding path program 265 times [2018-09-28 10:16:47,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:47,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:47,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:47,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:47,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:47,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:47,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:47,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:47,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:48,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:48,007 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:48,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:48,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:48,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:48,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:48,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:48,028 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:48,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:48,590 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:16:48,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:48,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:48,590 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:16:48,591 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:16:48,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:16:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:16:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:48,884 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:16:48,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:48,884 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:48,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:48,884 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:48,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:48,884 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:48,884 INFO L423 AbstractCegarLoop]: === Iteration 282 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:48,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:48,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1301994562, now seen corresponding path program 266 times [2018-09-28 10:16:48,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:48,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:48,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:48,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:48,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:48,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:48,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:48,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:48,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:48,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:48,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:48,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:48,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:48,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:48,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:48,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:48,992 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:16:49,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:49,608 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:16:49,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:49,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:49,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:49,609 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:16:49,609 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:16:49,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:49,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:16:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:16:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:49,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:49,919 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:49,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:49,919 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:49,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:49,919 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:49,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:49,920 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:16:49,920 INFO L423 AbstractCegarLoop]: === Iteration 283 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:49,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:49,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1301992640, now seen corresponding path program 267 times [2018-09-28 10:16:49,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:49,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:49,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:49,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:49,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:50,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:50,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:50,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:50,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:16:50,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:50,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:50,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:50,183 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:50,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:50,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:50,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:50,183 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:50,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:50,816 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:16:50,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:50,816 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:50,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:50,817 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:16:50,817 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:16:50,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:50,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:16:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-28 10:16:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:51,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:51,090 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:16:51,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:51,090 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:51,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:51,090 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:51,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:51,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:51,091 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:51,091 INFO L423 AbstractCegarLoop]: === Iteration 284 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:51,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash 471165758, now seen corresponding path program 268 times [2018-09-28 10:16:51,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:51,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:51,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:51,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:51,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:51,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:51,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:51,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:51,174 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:51,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:51,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:51,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:51,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:51,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:51,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:51,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:51,198 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:16:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:51,747 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:16:51,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:51,747 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:51,748 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:16:51,748 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:16:51,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:16:52,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-28 10:16:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:52,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:52,070 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:52,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:52,070 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:52,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:52,070 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:52,071 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:52,071 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:16:52,071 INFO L423 AbstractCegarLoop]: === Iteration 285 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:52,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:52,071 INFO L82 PathProgramCache]: Analyzing trace with hash 471167680, now seen corresponding path program 269 times [2018-09-28 10:16:52,071 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:52,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:52,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:52,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:52,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:52,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:52,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:52,152 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:52,161 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:16:52,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:52,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:52,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:52,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:52,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:52,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:52,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:52,186 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:52,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:52,723 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:16:52,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:52,723 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:52,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:52,724 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:16:52,724 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:16:52,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:52,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:16:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:16:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:53,013 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:16:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:53,013 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:53,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:53,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:53,014 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:16:53,014 INFO L423 AbstractCegarLoop]: === Iteration 286 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:53,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:53,014 INFO L82 PathProgramCache]: Analyzing trace with hash 473012800, now seen corresponding path program 270 times [2018-09-28 10:16:53,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:53,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:53,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:53,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:53,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:53,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:53,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:53,090 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:53,104 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:16:53,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:53,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:53,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:53,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:53,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:53,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:53,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:53,128 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:16:53,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:53,652 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:16:53,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:53,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:53,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:53,653 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:16:53,653 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:16:53,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:16:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:16:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:53,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:53,954 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:53,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:53,954 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:53,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:53,954 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:53,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:53,955 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:53,955 INFO L423 AbstractCegarLoop]: === Iteration 287 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:53,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:53,955 INFO L82 PathProgramCache]: Analyzing trace with hash 473014722, now seen corresponding path program 271 times [2018-09-28 10:16:53,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:53,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:53,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:53,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:53,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:54,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:54,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:54,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:54,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:54,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:54,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:54,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:54,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:54,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:54,056 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:54,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:54,543 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:16:54,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:54,543 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:54,544 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:16:54,544 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:16:54,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:16:54,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-28 10:16:54,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:16:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:16:54,746 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-28 10:16:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:54,746 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:16:54,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:16:54,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:54,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:54,747 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:16:54,747 INFO L423 AbstractCegarLoop]: === Iteration 288 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:54,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:54,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1023196730, now seen corresponding path program 272 times [2018-09-28 10:16:54,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:54,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:54,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:54,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:16:54,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:54,880 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:54,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:54,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:16:54,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:16:54,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:54,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:54,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:54,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:54,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:54,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:54,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:54,919 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-28 10:16:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:55,513 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:16:55,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:55,513 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:55,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:55,513 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:16:55,514 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:16:55,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:55,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:16:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:16:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:55,826 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:55,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:55,826 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:55,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:55,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:55,827 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:55,827 INFO L423 AbstractCegarLoop]: === Iteration 289 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:55,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:55,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1023198652, now seen corresponding path program 273 times [2018-09-28 10:16:55,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:55,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:55,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:55,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:55,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:55,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:55,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:55,904 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:16:55,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:16:55,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:55,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:55,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:55,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:55,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:55,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:55,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:55,937 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:56,527 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:16:56,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:56,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:56,528 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:16:56,528 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:16:56,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:16:56,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:16:56,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:16:56,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:16:56,835 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:16:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:56,836 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:16:56,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:16:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:56,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:56,836 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:56,836 INFO L423 AbstractCegarLoop]: === Iteration 290 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:56,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1025043772, now seen corresponding path program 274 times [2018-09-28 10:16:56,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:56,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:56,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:56,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:56,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:56,904 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:56,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:56,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:56,912 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:16:56,922 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:16:56,923 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:56,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:56,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:56,954 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:56,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:56,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:56,955 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:16:57,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:57,609 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:16:57,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:57,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:57,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:57,610 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:16:57,610 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:16:57,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:16:57,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:16:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:57,926 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:57,927 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:57,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:57,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:57,927 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:57,927 INFO L423 AbstractCegarLoop]: === Iteration 291 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:57,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:57,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1025045694, now seen corresponding path program 275 times [2018-09-28 10:16:57,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:57,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:57,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:57,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:57,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:57,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:57,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:58,008 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:16:58,018 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:16:58,018 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:58,019 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:58,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:58,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:58,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:58,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:58,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:58,043 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:16:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:58,630 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:16:58,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:58,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:58,631 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:16:58,631 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:16:58,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:16:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-28 10:16:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:16:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:16:58,919 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:16:58,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:58,920 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:16:58,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:58,920 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:16:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:58,920 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:58,920 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:16:58,920 INFO L423 AbstractCegarLoop]: === Iteration 292 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:58,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:58,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1496763204, now seen corresponding path program 276 times [2018-09-28 10:16:58,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:58,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:58,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:58,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:58,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:16:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:58,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:16:58,991 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:16:58,999 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:16:59,009 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:16:59,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:16:59,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:16:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:16:59,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:16:59,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:16:59,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:16:59,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:16:59,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:59,033 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:16:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:16:59,595 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:16:59,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:16:59,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:16:59,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:16:59,595 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:16:59,595 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:16:59,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:16:59,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:16:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:16:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:16:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:16:59,923 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:16:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:16:59,923 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:16:59,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:16:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:16:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:16:59,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:16:59,924 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:16:59,924 INFO L423 AbstractCegarLoop]: === Iteration 293 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:16:59,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:16:59,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1496761282, now seen corresponding path program 277 times [2018-09-28 10:16:59,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:16:59,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:16:59,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:59,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:16:59,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:16:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:00,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:00,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:00,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:00,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:00,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:00,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:00,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:00,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:00,117 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:00,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:00,651 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:17:00,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:00,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:00,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:00,651 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:17:00,651 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:17:00,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:00,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:17:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-28 10:17:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:01,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:01,030 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:01,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:01,030 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:01,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:01,030 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:01,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:01,030 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:01,030 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:01,031 INFO L423 AbstractCegarLoop]: === Iteration 294 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:01,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:01,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1494916162, now seen corresponding path program 278 times [2018-09-28 10:17:01,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:01,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:01,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:01,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:01,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:01,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:01,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:01,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:01,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:01,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:01,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:01,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:01,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:01,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:01,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:01,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:01,138 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:01,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:01,670 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:17:01,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:01,670 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:01,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:01,671 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:17:01,671 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:17:01,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:01,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:17:02,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:17:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:02,003 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:02,003 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:02,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:02,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:02,004 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:02,004 INFO L423 AbstractCegarLoop]: === Iteration 295 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:02,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:02,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1494914240, now seen corresponding path program 279 times [2018-09-28 10:17:02,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:02,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:02,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:02,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:02,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:02,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:02,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:02,083 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:02,093 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:17:02,093 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:02,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:02,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:02,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:02,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:02,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:02,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:02,117 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:02,630 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:17:02,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:02,630 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:02,631 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:17:02,631 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:17:02,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:17:02,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-28 10:17:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:17:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:17:02,900 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:17:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:02,900 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:17:02,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:02,900 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:17:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:02,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:02,901 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:17:02,901 INFO L423 AbstractCegarLoop]: === Iteration 296 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:02,901 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:02,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1703255100, now seen corresponding path program 280 times [2018-09-28 10:17:02,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:02,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:02,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:02,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:02,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:02,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:02,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:02,978 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:02,986 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:02,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:02,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:03,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:03,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:03,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:03,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:03,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:03,009 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:17:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:03,617 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:17:03,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:03,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:03,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:03,618 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:17:03,618 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:17:03,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:03,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:17:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:17:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:03,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:03,947 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:03,947 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:03,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:03,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:03,947 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:03,947 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:03,947 INFO L423 AbstractCegarLoop]: === Iteration 297 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:03,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:03,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1703257022, now seen corresponding path program 281 times [2018-09-28 10:17:03,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:03,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:03,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:03,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:03,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:04,017 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:04,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:04,024 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:04,034 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:17:04,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:04,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:04,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:04,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:04,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:04,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:04,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:04,060 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:04,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:04,647 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:17:04,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:04,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:04,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:04,648 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:17:04,648 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:17:04,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:04,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:17:04,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:17:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:04,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:04,959 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:04,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:04,959 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:04,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:04,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:04,959 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:04,959 INFO L423 AbstractCegarLoop]: === Iteration 298 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:04,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:04,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1705102142, now seen corresponding path program 282 times [2018-09-28 10:17:04,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:04,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:04,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:04,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:04,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:05,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:05,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:05,070 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:05,084 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:17:05,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:05,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:05,087 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:05,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:05,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:05,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:05,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:05,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:05,117 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:06,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:06,235 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:17:06,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:06,235 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:06,236 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:17:06,236 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:17:06,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:06,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:17:06,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:17:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:06,561 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:06,561 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:06,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:06,561 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:06,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:06,561 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:06,561 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:06,561 INFO L423 AbstractCegarLoop]: === Iteration 299 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:06,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:06,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1705104064, now seen corresponding path program 283 times [2018-09-28 10:17:06,562 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:06,562 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:06,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:06,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:06,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:06,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:06,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:06,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:06,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:06,667 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:06,667 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:06,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:06,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:06,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:06,668 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:07,269 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:17:07,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:07,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:07,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:07,270 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:17:07,270 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:17:07,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:07,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:17:07,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-28 10:17:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:17:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:17:07,631 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:17:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:07,631 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:17:07,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:17:07,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:07,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:07,631 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:07,631 INFO L423 AbstractCegarLoop]: === Iteration 300 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:07,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:07,632 INFO L82 PathProgramCache]: Analyzing trace with hash -816704834, now seen corresponding path program 284 times [2018-09-28 10:17:07,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:07,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:07,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:07,632 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:07,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:07,704 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:07,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:07,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:07,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:07,717 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:07,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:07,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:07,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:07,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:07,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:07,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:07,742 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:17:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:08,300 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:17:08,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:08,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:08,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:08,301 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:17:08,301 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:17:08,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:17:08,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:17:08,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:08,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:08,649 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:08,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:08,649 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:08,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:08,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:08,649 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:08,649 INFO L423 AbstractCegarLoop]: === Iteration 301 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:08,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash -816702912, now seen corresponding path program 285 times [2018-09-28 10:17:08,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:08,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:08,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:08,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:08,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:08,718 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:08,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:08,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:08,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:17:08,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:08,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:08,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:08,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:08,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:08,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:08,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:08,758 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:09,318 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:17:09,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:09,318 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:09,319 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:17:09,319 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:17:09,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:09,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:17:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-28 10:17:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:09,632 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:09,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:09,632 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:09,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:09,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:09,633 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:09,633 INFO L423 AbstractCegarLoop]: === Iteration 302 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:09,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash -814857792, now seen corresponding path program 286 times [2018-09-28 10:17:09,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:09,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:09,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:09,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:09,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:09,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:09,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:09,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:09,717 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:09,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:09,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:09,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:09,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:09,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:09,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:09,741 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:10,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:10,297 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:17:10,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:10,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:10,297 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:17:10,298 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:17:10,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:17:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:17:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:10,618 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:10,618 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:10,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:10,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:10,618 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:10,618 INFO L423 AbstractCegarLoop]: === Iteration 303 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:10,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:10,619 INFO L82 PathProgramCache]: Analyzing trace with hash -814855870, now seen corresponding path program 287 times [2018-09-28 10:17:10,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:10,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:10,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:10,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:10,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:10,693 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:10,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:10,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:10,702 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:10,711 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:17:10,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:10,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:10,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:10,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:10,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:10,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:10,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:10,736 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:11,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:11,255 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:17:11,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:11,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:11,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:11,256 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:17:11,256 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:17:11,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:11,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:17:11,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-28 10:17:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:17:11,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:17:11,502 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-28 10:17:11,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:11,502 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:17:11,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:11,503 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:17:11,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:11,503 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:11,503 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:17:11,503 INFO L423 AbstractCegarLoop]: === Iteration 304 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:11,503 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:11,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1724261308, now seen corresponding path program 288 times [2018-09-28 10:17:11,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:11,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:11,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:11,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:11,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:11,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:11,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:11,584 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:11,593 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:17:11,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:11,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:11,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:11,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:11,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:11,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:11,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:11,617 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-28 10:17:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:12,141 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:17:12,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:12,141 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:12,142 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:17:12,142 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:17:12,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:12,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:17:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:17:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:12,474 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:12,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:12,474 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:12,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:12,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:12,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:12,475 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:12,475 INFO L423 AbstractCegarLoop]: === Iteration 305 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:12,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1724263230, now seen corresponding path program 289 times [2018-09-28 10:17:12,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:12,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:12,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:12,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:12,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:12,543 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:12,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:12,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:12,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:12,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:12,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:12,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:12,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:12,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:12,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:12,582 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:13,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:13,127 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:17:13,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:13,127 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:13,127 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:17:13,127 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:17:13,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:17:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:17:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:13,452 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:13,452 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:13,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:13,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:13,453 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:13,453 INFO L423 AbstractCegarLoop]: === Iteration 306 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:13,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:13,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1726108350, now seen corresponding path program 290 times [2018-09-28 10:17:13,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:13,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:13,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:13,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:13,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:13,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:13,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:13,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:13,552 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:13,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:13,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:13,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:13,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:13,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:13,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:13,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:13,575 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:14,084 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:17:14,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:14,084 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:14,085 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:17:14,085 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:17:14,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:14,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:17:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-28 10:17:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:14,422 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:14,422 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:14,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:14,422 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:14,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:14,423 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:14,423 INFO L423 AbstractCegarLoop]: === Iteration 307 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:14,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:14,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1726110272, now seen corresponding path program 291 times [2018-09-28 10:17:14,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:14,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:14,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:14,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:14,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:14,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:14,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:14,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:14,509 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:17:14,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:14,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:14,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:14,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:14,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:14,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:14,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:14,534 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:15,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:15,034 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:17:15,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:15,034 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:15,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:15,034 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:17:15,034 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:17:15,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:15,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:17:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:17:15,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:17:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:17:15,348 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:17:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:15,348 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:17:15,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:17:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:15,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:15,349 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:15,349 INFO L423 AbstractCegarLoop]: === Iteration 308 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:15,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:15,349 INFO L82 PathProgramCache]: Analyzing trace with hash -795698626, now seen corresponding path program 292 times [2018-09-28 10:17:15,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:15,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:15,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:15,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:15,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:15,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:15,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:15,434 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:15,443 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:15,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:15,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:15,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:15,478 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:15,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:15,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:15,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:15,478 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:17:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:16,070 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:17:16,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:16,070 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:16,070 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:17:16,070 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:17:16,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:17:16,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:17:16,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:16,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:16,416 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:16,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:16,416 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:16,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:16,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:16,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:16,417 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:16,417 INFO L423 AbstractCegarLoop]: === Iteration 309 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:16,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:16,417 INFO L82 PathProgramCache]: Analyzing trace with hash -795696704, now seen corresponding path program 293 times [2018-09-28 10:17:16,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:16,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:16,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:16,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:16,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:16,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:16,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:16,493 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:16,504 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:17:16,504 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:16,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:16,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:16,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:16,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:16,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:16,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:16,530 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:17,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:17,080 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:17:17,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:17,080 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:17,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:17,081 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:17:17,081 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:17:17,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:17:17,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:17:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:17,417 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:17,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:17,417 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:17,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:17,417 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:17,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:17,417 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:17,418 INFO L423 AbstractCegarLoop]: === Iteration 310 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:17,418 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:17,418 INFO L82 PathProgramCache]: Analyzing trace with hash -793851584, now seen corresponding path program 294 times [2018-09-28 10:17:17,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:17,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:17,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:17,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:17,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:17,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:17,487 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:17,493 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:17,507 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:17:17,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:17,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:17,512 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:17,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:17,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:17,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:17,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:17,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:17,542 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:18,064 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:17:18,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:18,064 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:18,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:18,064 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:17:18,065 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:17:18,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:18,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:17:18,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-28 10:17:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:18,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:18,400 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:18,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:18,401 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:18,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:18,401 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:18,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:18,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:18,401 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:18,401 INFO L423 AbstractCegarLoop]: === Iteration 311 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:18,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:18,401 INFO L82 PathProgramCache]: Analyzing trace with hash -793849662, now seen corresponding path program 295 times [2018-09-28 10:17:18,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:18,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:18,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:18,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:18,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:18,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:18,470 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:18,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:18,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:18,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:18,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:18,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:18,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:18,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:18,507 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:19,009 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:17:19,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:19,009 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:19,010 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:17:19,010 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:17:19,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:17:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:17:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:17:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:17:19,289 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:17:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:19,289 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:17:19,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:17:19,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:19,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:19,289 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:19,289 INFO L423 AbstractCegarLoop]: === Iteration 312 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:19,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:19,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1890647618, now seen corresponding path program 296 times [2018-09-28 10:17:19,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:19,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:19,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:19,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:19,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:19,359 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:19,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:19,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:19,373 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:19,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:19,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:19,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:19,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:19,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:19,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:19,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:19,396 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:17:19,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:19,889 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:17:19,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:19,889 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:19,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:19,890 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:17:19,890 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:17:19,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:17:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-28 10:17:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:20,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:20,228 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:20,228 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:20,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:20,228 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:20,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:20,229 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:20,229 INFO L423 AbstractCegarLoop]: === Iteration 313 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:20,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1890645696, now seen corresponding path program 297 times [2018-09-28 10:17:20,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:20,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:20,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:20,230 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:20,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:20,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:20,617 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:20,617 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:20,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:20,639 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:17:20,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:20,640 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:20,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:20,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:20,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:20,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:20,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:20,663 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:21,148 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:17:21,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:21,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:21,149 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:17:21,149 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:17:21,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:21,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:17:21,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-28 10:17:21,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:21,477 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:21,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:21,477 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:21,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:21,478 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:21,478 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:21,478 INFO L423 AbstractCegarLoop]: === Iteration 314 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:21,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:21,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1888800576, now seen corresponding path program 298 times [2018-09-28 10:17:21,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:21,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:21,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:21,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:21,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:21,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:21,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:21,554 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:21,560 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:21,560 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:21,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:21,593 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:21,593 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:21,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:21,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:21,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:21,594 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:22,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:22,121 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:17:22,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:22,121 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:22,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:22,122 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:17:22,122 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:17:22,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:22,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:17:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-28 10:17:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:22,459 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:22,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:22,460 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:22,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:22,460 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:22,460 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:22,460 INFO L423 AbstractCegarLoop]: === Iteration 315 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:22,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:22,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1888798654, now seen corresponding path program 299 times [2018-09-28 10:17:22,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:22,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:22,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:22,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:22,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:22,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:22,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:22,534 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:22,545 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:17:22,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:22,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:22,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:22,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:22,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:22,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:22,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:22,568 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:23,037 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:17:23,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:23,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:23,037 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:17:23,037 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:17:23,037 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:17:23,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:17:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:17:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:17:23,358 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:17:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:23,358 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:17:23,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:17:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:23,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:23,358 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:23,359 INFO L423 AbstractCegarLoop]: === Iteration 316 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:23,359 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:23,359 INFO L82 PathProgramCache]: Analyzing trace with hash -115640256, now seen corresponding path program 300 times [2018-09-28 10:17:23,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:23,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:23,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:23,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:23,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:23,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:23,429 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:23,436 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:23,447 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:17:23,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:23,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:23,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:23,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:23,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:23,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:23,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:23,477 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:17:23,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:23,929 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:17:23,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:23,929 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:23,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:23,930 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:17:23,930 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:17:23,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:23,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:17:24,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-28 10:17:24,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:24,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:24,273 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:24,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:24,273 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:24,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:24,273 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:24,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:24,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:24,273 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:24,273 INFO L423 AbstractCegarLoop]: === Iteration 317 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:24,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:24,274 INFO L82 PathProgramCache]: Analyzing trace with hash -115638334, now seen corresponding path program 301 times [2018-09-28 10:17:24,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:24,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:24,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:24,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:24,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:24,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:24,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:24,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:24,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:24,378 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:24,378 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:24,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:24,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:24,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:24,379 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:24,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:24,832 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:17:24,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:24,832 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:24,833 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:17:24,833 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:17:24,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:24,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:17:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-28 10:17:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:25,166 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:25,166 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:25,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:25,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:25,166 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:25,166 INFO L423 AbstractCegarLoop]: === Iteration 318 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:25,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:25,167 INFO L82 PathProgramCache]: Analyzing trace with hash -113793214, now seen corresponding path program 302 times [2018-09-28 10:17:25,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:25,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:25,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:25,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:25,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:25,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:25,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:25,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:25,248 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:25,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:25,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:25,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:25,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:25,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:25,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:25,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:25,271 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:25,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:25,672 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:17:25,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:25,672 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:25,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:25,672 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:17:25,672 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:17:25,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:17:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-28 10:17:26,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:26,009 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:26,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:26,009 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:26,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:26,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:26,009 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:17:26,009 INFO L423 AbstractCegarLoop]: === Iteration 319 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:26,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:26,009 INFO L82 PathProgramCache]: Analyzing trace with hash -113791292, now seen corresponding path program 303 times [2018-09-28 10:17:26,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:26,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:26,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:26,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:26,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:26,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:26,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:26,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:26,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:17:26,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:26,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:26,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:26,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:26,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:26,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:26,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:26,129 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:26,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:26,540 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-09-28 10:17:26,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:26,540 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:26,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:26,541 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:17:26,541 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:17:26,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:26,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:17:26,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-09-28 10:17:26,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:17:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:17:26,754 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-09-28 10:17:26,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:26,754 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:17:26,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:26,754 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:17:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:26,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:26,754 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:17:26,755 INFO L423 AbstractCegarLoop]: === Iteration 320 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:26,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash 330139066, now seen corresponding path program 304 times [2018-09-28 10:17:26,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:26,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:26,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:26,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:26,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:26,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:26,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:26,855 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:26,883 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:26,883 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:26,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:26,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:26,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:26,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:26,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:26,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:26,918 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-09-28 10:17:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:27,731 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:17:27,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:27,731 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:27,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:27,732 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:17:27,732 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:17:27,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:17:28,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:17:28,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:28,111 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:28,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:28,112 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:28,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:28,112 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:28,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:28,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:28,112 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:17:28,112 INFO L423 AbstractCegarLoop]: === Iteration 321 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:28,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:28,112 INFO L82 PathProgramCache]: Analyzing trace with hash 330140988, now seen corresponding path program 305 times [2018-09-28 10:17:28,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:28,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:28,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:28,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:28,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:28,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:28,186 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:28,195 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:28,206 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:17:28,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:28,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:28,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:28,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:28,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:28,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:28,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:28,230 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:29,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:29,019 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:17:29,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:29,019 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:29,020 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:17:29,020 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:17:29,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:17:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:17:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:29,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:29,389 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:29,389 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:29,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:29,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:29,389 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:17:29,389 INFO L423 AbstractCegarLoop]: === Iteration 322 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:29,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:29,390 INFO L82 PathProgramCache]: Analyzing trace with hash 331986108, now seen corresponding path program 306 times [2018-09-28 10:17:29,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:29,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:29,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:29,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:29,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:29,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:29,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:29,466 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:29,475 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:17:29,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:29,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:29,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:29,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:29,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:29,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:29,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:29,498 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:30,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:30,241 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:17:30,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:30,241 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:30,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:30,241 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:17:30,241 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:17:30,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:30,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:17:30,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:17:30,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:30,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:30,628 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:30,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:30,628 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:30,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:30,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:30,628 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:30,628 INFO L423 AbstractCegarLoop]: === Iteration 323 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:30,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:30,629 INFO L82 PathProgramCache]: Analyzing trace with hash 331988030, now seen corresponding path program 307 times [2018-09-28 10:17:30,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:30,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:30,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:30,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:30,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:30,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:30,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:30,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:30,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:30,742 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:30,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:30,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:30,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:30,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:30,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:30,762 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:31,493 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:17:31,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:31,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:31,494 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:17:31,494 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:17:31,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:17:31,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-28 10:17:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:17:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:17:31,851 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:17:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:31,851 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:17:31,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:17:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:31,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:31,852 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:17:31,852 INFO L423 AbstractCegarLoop]: === Iteration 324 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:31,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2105146428, now seen corresponding path program 308 times [2018-09-28 10:17:31,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:31,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:31,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:31,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:31,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:31,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:31,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:31,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:31,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:31,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:31,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:31,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:31,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:31,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:31,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:31,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:31,969 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:17:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:32,744 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:17:32,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:32,744 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:32,745 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:17:32,745 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:17:32,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:32,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:17:33,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:17:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:33,216 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:33,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:33,217 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:33,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:33,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:33,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:33,217 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:33,217 INFO L423 AbstractCegarLoop]: === Iteration 325 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:33,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2105148350, now seen corresponding path program 309 times [2018-09-28 10:17:33,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:33,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:33,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:33,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:33,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:33,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:33,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:33,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:33,306 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:17:33,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:33,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:33,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:33,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:33,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:33,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:33,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:33,330 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:34,105 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:17:34,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:34,105 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:34,106 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:17:34,106 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:17:34,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:17:34,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:17:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:34,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:34,482 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:34,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:34,482 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:34,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:34,482 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:34,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:34,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:34,483 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:34,483 INFO L423 AbstractCegarLoop]: === Iteration 326 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:34,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:34,483 INFO L82 PathProgramCache]: Analyzing trace with hash 2106993470, now seen corresponding path program 310 times [2018-09-28 10:17:34,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:34,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:34,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:34,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:34,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:34,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:34,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:34,565 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:34,570 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:34,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:34,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:34,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:34,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:34,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:34,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:34,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:34,595 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:35,355 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:17:35,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:35,355 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:35,356 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:17:35,356 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:17:35,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:17:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:17:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:35,737 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:35,737 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:35,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:35,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:35,738 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:35,738 INFO L423 AbstractCegarLoop]: === Iteration 327 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:35,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:35,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2106995392, now seen corresponding path program 311 times [2018-09-28 10:17:35,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:35,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:35,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:35,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:35,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:35,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:35,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:35,876 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:35,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:17:35,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:35,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:35,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:35,921 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:35,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:35,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:35,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:35,922 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:36,840 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:17:36,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:36,840 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:36,841 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:17:36,841 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:17:36,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:17:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-28 10:17:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:17:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:17:37,167 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:17:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:37,167 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:17:37,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:17:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:37,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:37,168 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:17:37,168 INFO L423 AbstractCegarLoop]: === Iteration 328 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:37,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:37,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1010197436, now seen corresponding path program 312 times [2018-09-28 10:17:37,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:37,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:37,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:37,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:37,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:37,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:37,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:37,244 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:37,253 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:17:37,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:37,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:37,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:37,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:37,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:37,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:37,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:37,277 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:17:38,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:38,028 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:17:38,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:38,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:38,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:38,029 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:17:38,029 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:17:38,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:17:38,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:17:38,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:38,423 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:38,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:38,423 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:38,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:38,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:38,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:38,423 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:38,423 INFO L423 AbstractCegarLoop]: === Iteration 329 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:38,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:38,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1010199358, now seen corresponding path program 313 times [2018-09-28 10:17:38,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:38,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:38,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:38,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:38,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:38,490 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:38,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:38,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:38,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:38,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:38,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:38,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:38,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:38,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:38,526 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:39,245 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:17:39,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:39,245 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:39,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:39,246 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:17:39,246 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:17:39,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:39,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:17:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:17:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:39,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:39,626 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:39,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:39,626 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:39,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:39,626 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:39,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:39,626 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:39,627 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:39,627 INFO L423 AbstractCegarLoop]: === Iteration 330 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:39,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:39,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1012044478, now seen corresponding path program 314 times [2018-09-28 10:17:39,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:39,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:39,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:39,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:39,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:39,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:39,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:39,704 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:39,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:39,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:39,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:39,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:39,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:39,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:39,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:39,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:39,734 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:40,465 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:17:40,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:40,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:40,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:40,466 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:17:40,466 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:17:40,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:40,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:17:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:17:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:40,855 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:40,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:40,855 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:40,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:40,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:40,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:40,856 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:40,856 INFO L423 AbstractCegarLoop]: === Iteration 331 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:40,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:40,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1012046400, now seen corresponding path program 315 times [2018-09-28 10:17:40,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:40,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:40,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:40,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:40,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:41,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:41,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:41,040 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:41,052 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:17:41,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:41,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:41,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:41,076 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:41,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:41,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:41,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:41,077 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:41,759 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:17:41,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:41,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:41,760 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:17:41,760 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:17:41,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:17:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-28 10:17:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:17:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:17:42,122 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:17:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:42,122 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:17:42,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:17:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:42,122 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:42,123 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:42,123 INFO L423 AbstractCegarLoop]: === Iteration 332 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:42,123 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:42,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1509762498, now seen corresponding path program 316 times [2018-09-28 10:17:42,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:42,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:42,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:42,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:42,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:42,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:42,197 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:42,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:42,211 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:42,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:42,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:42,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:42,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:42,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:42,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:42,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:42,235 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:17:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:42,904 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:17:42,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:42,904 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:42,905 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:17:42,905 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:17:42,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:42,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:17:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-28 10:17:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:43,292 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:43,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:43,293 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:43,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:43,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:43,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:43,293 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:43,293 INFO L423 AbstractCegarLoop]: === Iteration 333 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:43,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:43,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1509760576, now seen corresponding path program 317 times [2018-09-28 10:17:43,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:43,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:43,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:43,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:43,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:43,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:43,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:43,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:43,378 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:17:43,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:43,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:43,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:43,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:43,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:43,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:43,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:43,403 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:44,085 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:17:44,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:44,085 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:44,086 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:17:44,086 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:17:44,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:17:44,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:17:44,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:44,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:44,464 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:44,464 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:44,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:44,465 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:44,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:44,465 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:44,465 INFO L423 AbstractCegarLoop]: === Iteration 334 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:44,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:44,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1507915456, now seen corresponding path program 318 times [2018-09-28 10:17:44,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:44,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:44,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:44,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:44,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:44,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:44,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:44,553 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:44,563 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:17:44,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:44,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:44,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:44,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:44,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:44,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:44,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:44,587 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:45,223 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:17:45,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:45,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:45,224 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:17:45,224 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:17:45,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:45,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:17:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:17:45,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:45,610 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:45,610 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:45,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:45,610 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:45,610 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:45,610 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:45,611 INFO L423 AbstractCegarLoop]: === Iteration 335 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:45,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:45,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1507913534, now seen corresponding path program 319 times [2018-09-28 10:17:45,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:45,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:45,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:45,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:45,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:45,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:45,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:45,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:45,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:45,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:45,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:45,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:45,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:45,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:45,715 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:46,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:46,367 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:17:46,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:46,368 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:46,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:46,368 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:17:46,368 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:17:46,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:46,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:17:46,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-09-28 10:17:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:17:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:17:46,674 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-28 10:17:46,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:46,674 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:17:46,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:46,674 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:17:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:46,674 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:46,675 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:17:46,675 INFO L423 AbstractCegarLoop]: === Iteration 336 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:46,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:46,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1031203644, now seen corresponding path program 320 times [2018-09-28 10:17:46,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:46,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:46,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:46,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:46,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:46,748 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:46,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:46,755 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:46,770 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:46,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:46,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:46,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:46,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:46,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:46,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:46,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:46,794 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-28 10:17:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:47,606 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:17:47,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:47,606 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:47,607 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:17:47,607 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:17:47,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:17:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:17:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:48,011 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:48,011 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:48,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:48,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:48,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:48,012 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:48,012 INFO L423 AbstractCegarLoop]: === Iteration 337 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:48,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1031205566, now seen corresponding path program 321 times [2018-09-28 10:17:48,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:48,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:48,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:48,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:48,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:48,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:48,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:48,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:48,099 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:17:48,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:48,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:48,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:48,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:48,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:48,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:48,130 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:48,964 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:17:48,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:48,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:48,964 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:17:48,964 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:17:48,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:17:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:17:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:49,361 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:49,361 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:49,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:49,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:49,361 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:49,362 INFO L423 AbstractCegarLoop]: === Iteration 338 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:49,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:49,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1033050686, now seen corresponding path program 322 times [2018-09-28 10:17:49,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:49,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:49,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:49,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:49,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:49,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:49,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:49,435 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:49,442 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:49,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:49,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:49,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:49,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:49,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:49,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:49,466 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:50,247 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:17:50,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:50,247 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:50,248 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:17:50,248 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:17:50,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:17:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:17:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:50,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:50,644 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:50,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:50,644 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:50,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:50,644 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:50,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:50,645 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:50,645 INFO L423 AbstractCegarLoop]: === Iteration 339 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:50,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1033052608, now seen corresponding path program 323 times [2018-09-28 10:17:50,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:50,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:50,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:50,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:50,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:50,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:50,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:50,719 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:50,729 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:17:50,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:50,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:50,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:50,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:50,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:50,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:50,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:50,756 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:51,503 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:17:51,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:51,503 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:51,503 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:17:51,503 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:17:51,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:51,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:17:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 30. [2018-09-28 10:17:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:17:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:17:51,869 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:17:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:51,869 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:17:51,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:17:51,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:51,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:51,869 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:51,870 INFO L423 AbstractCegarLoop]: === Iteration 340 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:51,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:51,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1488756290, now seen corresponding path program 324 times [2018-09-28 10:17:51,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:51,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:51,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:51,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:51,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:51,936 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:51,936 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:51,955 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:51,997 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:17:51,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:51,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:52,001 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:52,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:52,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:52,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:52,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:52,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:52,022 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:17:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:52,827 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:17:52,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:52,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:52,828 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:17:52,828 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:17:52,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:52,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:17:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 34. [2018-09-28 10:17:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:53,232 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:53,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:53,232 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:53,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:53,232 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:53,232 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:53,233 INFO L423 AbstractCegarLoop]: === Iteration 341 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:53,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:53,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1488754368, now seen corresponding path program 325 times [2018-09-28 10:17:53,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:53,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:53,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:53,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:53,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:53,301 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:53,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:53,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:53,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:53,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:53,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:53,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:53,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:53,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:53,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:53,339 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:54,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:54,172 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2018-09-28 10:17:54,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:54,172 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:54,173 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:17:54,173 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:17:54,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:17:54,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2018-09-28 10:17:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:54,557 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:54,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:54,557 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:54,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:54,557 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:54,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:54,557 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:54,557 INFO L423 AbstractCegarLoop]: === Iteration 342 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:54,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:54,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1486909248, now seen corresponding path program 326 times [2018-09-28 10:17:54,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:54,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:54,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:54,558 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:17:54,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:54,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:54,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:54,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:17:54,638 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:17:54,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:54,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:54,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:54,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:54,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:54,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:54,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:54,662 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:17:55,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:55,456 INFO L93 Difference]: Finished difference Result 59 states and 85 transitions. [2018-09-28 10:17:55,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:55,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:55,457 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:17:55,457 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:17:55,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:55,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:17:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2018-09-28 10:17:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:55,855 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:55,855 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:55,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:55,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:55,855 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:55,856 INFO L423 AbstractCegarLoop]: === Iteration 343 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:55,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:55,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1486907326, now seen corresponding path program 327 times [2018-09-28 10:17:55,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:55,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:55,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:55,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:55,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:55,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:55,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:55,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:17:55,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:17:55,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:55,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:55,981 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:55,981 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:55,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:55,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:55,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:55,982 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:56,729 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:17:56,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:56,729 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:56,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:56,730 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:17:56,730 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:17:56,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:56,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:17:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 28. [2018-09-28 10:17:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:17:57,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:17:57,074 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:17:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:57,074 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:17:57,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:17:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:57,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:57,074 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:17:57,074 INFO L423 AbstractCegarLoop]: === Iteration 344 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:57,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:57,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1711262014, now seen corresponding path program 328 times [2018-09-28 10:17:57,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:57,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:57,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:57,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:57,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:57,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:57,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:57,397 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:17:57,404 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:17:57,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:57,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:57,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:57,430 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:57,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:57,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:57,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:57,431 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:17:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:58,255 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:17:58,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:58,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:58,255 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:17:58,255 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:17:58,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:58,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:17:58,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:17:58,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:17:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:17:58,654 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:17:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:58,654 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:17:58,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:17:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:58,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:58,655 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:58,655 INFO L423 AbstractCegarLoop]: === Iteration 345 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:58,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:58,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1711263936, now seen corresponding path program 329 times [2018-09-28 10:17:58,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:58,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:58,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:58,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:58,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:58,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:58,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:58,732 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:17:58,742 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:17:58,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:58,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:58,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:17:58,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:17:58,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:17:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:17:58,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:58,767 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:17:59,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:17:59,500 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:17:59,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:17:59,500 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:17:59,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:17:59,501 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:17:59,501 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:17:59,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:17:59,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:17:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2018-09-28 10:17:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:17:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:17:59,892 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:17:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:17:59,892 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:17:59,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:17:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:17:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:17:59,892 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:17:59,892 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:17:59,892 INFO L423 AbstractCegarLoop]: === Iteration 346 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:17:59,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:17:59,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1713109056, now seen corresponding path program 330 times [2018-09-28 10:17:59,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:17:59,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:17:59,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:59,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:17:59,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:17:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:17:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:17:59,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:17:59,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:17:59,969 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:17:59,979 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:17:59,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:17:59,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:17:59,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:00,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:00,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:00,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:00,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:00,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:00,003 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:18:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:00,758 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2018-09-28 10:18:00,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:00,758 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:00,759 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:18:00,759 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:18:00,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:18:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2018-09-28 10:18:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:01,162 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:01,162 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:01,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:01,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:01,162 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:01,163 INFO L423 AbstractCegarLoop]: === Iteration 347 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:01,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:01,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1713110978, now seen corresponding path program 331 times [2018-09-28 10:18:01,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:01,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:01,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:01,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:01,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:01,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:01,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:01,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:01,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:01,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:01,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:01,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:01,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:01,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:01,344 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:02,066 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:18:02,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:02,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:02,067 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:18:02,067 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:18:02,067 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:02,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:18:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2018-09-28 10:18:02,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:18:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:18:02,442 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:18:02,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:02,442 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:18:02,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:02,442 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:18:02,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:02,442 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:02,442 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:18:02,442 INFO L423 AbstractCegarLoop]: === Iteration 348 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:02,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:02,443 INFO L82 PathProgramCache]: Analyzing trace with hash -808697920, now seen corresponding path program 332 times [2018-09-28 10:18:02,443 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:02,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:02,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:02,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:02,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:02,512 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:02,512 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:02,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:18:02,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:18:02,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:02,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:02,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:02,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:02,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:02,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:02,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:02,550 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:18:03,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:03,244 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:18:03,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:03,244 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:03,245 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:18:03,245 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:18:03,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:18:03,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2018-09-28 10:18:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:03,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:03,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:03,648 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:03,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:03,651 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:03,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:03,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:03,651 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:03,652 INFO L423 AbstractCegarLoop]: === Iteration 349 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:03,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:03,652 INFO L82 PathProgramCache]: Analyzing trace with hash -808695998, now seen corresponding path program 333 times [2018-09-28 10:18:03,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:03,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:03,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:03,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:03,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:03,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:03,719 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:03,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:18:03,736 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:18:03,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:03,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:03,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:03,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:03,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:03,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:03,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:03,766 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:04,478 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:18:04,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:04,478 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:04,479 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:18:04,479 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:18:04,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:18:04,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:18:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:18:04,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:18:04,876 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:18:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:04,876 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:18:04,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:18:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:04,876 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:04,876 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:04,876 INFO L423 AbstractCegarLoop]: === Iteration 350 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:04,876 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:04,876 INFO L82 PathProgramCache]: Analyzing trace with hash -806850878, now seen corresponding path program 334 times [2018-09-28 10:18:04,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:04,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:04,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:04,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:04,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:04,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:04,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:04,957 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:18:04,964 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:18:04,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:04,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:04,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:04,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:04,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:04,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:04,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:04,987 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:18:05,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:05,663 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:18:05,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:05,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:05,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:05,663 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:18:05,663 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:18:05,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:05,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:18:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:18:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:06,074 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:06,074 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:06,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:06,075 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:06,075 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:18:06,075 INFO L423 AbstractCegarLoop]: === Iteration 351 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:06,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:06,075 INFO L82 PathProgramCache]: Analyzing trace with hash -806848956, now seen corresponding path program 335 times [2018-09-28 10:18:06,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:06,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:06,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:06,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:06,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:06,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:06,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:06,279 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:18:06,288 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:18:06,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:06,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:06,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:06,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:06,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:06,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:06,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:06,312 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:06,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:06,935 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:18:06,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:06,935 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:06,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:06,935 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:18:06,935 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:18:06,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:18:07,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 24. [2018-09-28 10:18:07,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:18:07,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2018-09-28 10:18:07,209 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 19 [2018-09-28 10:18:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:07,209 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2018-09-28 10:18:07,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:07,209 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2018-09-28 10:18:07,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:07,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:07,210 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:18:07,210 INFO L423 AbstractCegarLoop]: === Iteration 352 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:07,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:07,210 INFO L82 PathProgramCache]: Analyzing trace with hash -256666948, now seen corresponding path program 336 times [2018-09-28 10:18:07,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:07,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:07,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:07,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:07,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:07,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:07,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:07,285 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:18:07,294 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:18:07,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:07,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:07,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:07,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:07,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:07,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:07,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:07,318 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 11 states. [2018-09-28 10:18:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:08,080 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:18:08,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:08,080 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:08,081 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:18:08,081 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:18:08,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:08,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:18:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:18:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:08,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:08,508 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:08,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:08,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:08,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:08,509 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:08,509 INFO L423 AbstractCegarLoop]: === Iteration 353 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:08,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:08,509 INFO L82 PathProgramCache]: Analyzing trace with hash -256665026, now seen corresponding path program 337 times [2018-09-28 10:18:08,509 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:08,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:08,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:08,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:08,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:08,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:08,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:08,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:08,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:08,613 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:08,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:08,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:08,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:08,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:08,614 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:09,335 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:18:09,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:09,335 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:09,335 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:18:09,335 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:18:09,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:18:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:18:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:18:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:18:09,749 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:18:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:09,750 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:18:09,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:18:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:09,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:09,750 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:09,750 INFO L423 AbstractCegarLoop]: === Iteration 354 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:09,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:09,750 INFO L82 PathProgramCache]: Analyzing trace with hash -254819906, now seen corresponding path program 338 times [2018-09-28 10:18:09,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:09,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:09,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:09,751 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:09,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:09,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:09,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:09,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:18:09,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:18:09,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:09,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:09,893 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:09,893 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:09,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:09,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:09,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:09,894 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:18:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:10,634 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:18:10,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:10,634 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:10,635 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:18:10,635 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:18:10,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:18:11,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:18:11,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:11,056 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:11,057 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:11,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:11,057 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:11,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:11,057 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:18:11,057 INFO L423 AbstractCegarLoop]: === Iteration 355 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:11,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash -254817984, now seen corresponding path program 339 times [2018-09-28 10:18:11,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:11,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:11,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:11,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:11,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:11,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:11,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:11,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:18:11,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:18:11,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:11,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:11,178 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:11,178 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:11,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:11,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:11,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:11,179 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:11,895 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:18:11,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:11,895 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:11,895 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:18:11,895 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:18:11,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:18:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-28 10:18:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:18:12,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:18:12,289 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:18:12,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:12,289 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:18:12,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:12,289 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:18:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:12,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:12,289 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:12,289 INFO L423 AbstractCegarLoop]: === Iteration 356 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:12,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:12,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1518340414, now seen corresponding path program 340 times [2018-09-28 10:18:12,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:12,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:12,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:12,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:12,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:12,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:12,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:12,376 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:18:12,409 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:18:12,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:12,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:12,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:12,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:12,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:12,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:12,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:12,443 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:18:13,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:13,143 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:18:13,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:13,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:13,144 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:18:13,144 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:18:13,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:13,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:18:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:18:13,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:13,569 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:13,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:13,569 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:13,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:13,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:13,570 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:18:13,570 INFO L423 AbstractCegarLoop]: === Iteration 357 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:13,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:13,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1518342336, now seen corresponding path program 341 times [2018-09-28 10:18:13,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:13,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:13,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:13,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:13,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:13,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:13,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:13,650 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:18:13,660 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:18:13,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:13,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:13,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:13,683 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:13,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:13,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:13,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:13,684 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:14,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:14,401 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:18:14,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:14,401 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:14,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:14,402 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:18:14,402 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:18:14,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:18:14,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-28 10:18:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:18:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:18:14,816 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:18:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:14,816 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:18:14,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:14,816 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:18:14,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:14,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:14,817 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:18:14,817 INFO L423 AbstractCegarLoop]: === Iteration 358 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:14,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:14,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1520187456, now seen corresponding path program 342 times [2018-09-28 10:18:14,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:14,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:14,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:14,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:14,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:14,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:14,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:14,904 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:18:14,913 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:18:14,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:14,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:14,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:14,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:14,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:14,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:14,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:14,937 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:18:15,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:15,603 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:18:15,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:15,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:15,604 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:18:15,604 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:18:15,604 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:18:16,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:18:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:16,038 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:16,038 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:16,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:16,038 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:16,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:16,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:16,038 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:16,039 INFO L423 AbstractCegarLoop]: === Iteration 359 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:16,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:16,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1520189378, now seen corresponding path program 343 times [2018-09-28 10:18:16,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:16,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:16,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:16,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:16,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:16,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:16,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:16,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:16,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:16,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:16,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:16,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:16,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:16,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:16,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:16,152 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:16,790 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:18:16,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:16,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:16,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:16,790 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:18:16,790 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:18:16,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:18:17,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2018-09-28 10:18:17,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:18:17,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:18:17,147 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:18:17,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:17,148 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:18:17,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:17,148 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:18:17,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:17,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:17,148 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:17,148 INFO L423 AbstractCegarLoop]: === Iteration 360 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:17,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:17,148 INFO L82 PathProgramCache]: Analyzing trace with hash 423391422, now seen corresponding path program 344 times [2018-09-28 10:18:17,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:17,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:17,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:17,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:17,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:17,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:17,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:17,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:18:17,241 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:18:17,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:17,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:17,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:17,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:17,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:17,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:17,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:17,266 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:18:18,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:18,031 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:18:18,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:18,031 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:18,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:18,031 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:18:18,031 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:18:18,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:18:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:18:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:18,462 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:18,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:18,462 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:18,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:18,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:18,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:18,462 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:18:18,463 INFO L423 AbstractCegarLoop]: === Iteration 361 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:18,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:18,463 INFO L82 PathProgramCache]: Analyzing trace with hash 423393344, now seen corresponding path program 345 times [2018-09-28 10:18:18,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:18,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:18,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:18,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:18,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:18,529 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:18,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:18,536 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:18:18,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:18:18,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:18,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:18,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:18,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:18,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:18,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:18,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:18,580 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:19,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:19,309 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:18:19,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:19,309 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:19,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:19,310 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:18:19,310 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:18:19,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:18:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2018-09-28 10:18:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:18:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:18:19,727 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:18:19,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:19,727 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:18:19,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:18:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:19,727 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:19,727 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:18:19,727 INFO L423 AbstractCegarLoop]: === Iteration 362 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:19,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:19,727 INFO L82 PathProgramCache]: Analyzing trace with hash 425238464, now seen corresponding path program 346 times [2018-09-28 10:18:19,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:19,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:19,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:19,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:19,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:19,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:19,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:19,812 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:18:19,818 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:18:19,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:19,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:19,820 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:19,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:19,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:19,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:19,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:19,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:19,850 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:18:20,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:20,627 INFO L93 Difference]: Finished difference Result 55 states and 79 transitions. [2018-09-28 10:18:20,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:20,627 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:20,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:20,627 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:18:20,627 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:18:20,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:18:21,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 34. [2018-09-28 10:18:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:21,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:21,055 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:21,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:21,055 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:21,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:21,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:21,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:21,055 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:21,056 INFO L423 AbstractCegarLoop]: === Iteration 363 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:21,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash 425240386, now seen corresponding path program 347 times [2018-09-28 10:18:21,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:21,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:21,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:21,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:21,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:21,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:21,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:21,131 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:18:21,142 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:18:21,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:21,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:21,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:21,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:21,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:21,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:21,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:21,165 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:21,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:21,918 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2018-09-28 10:18:21,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:21,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:21,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:21,918 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:18:21,918 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:18:21,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:18:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2018-09-28 10:18:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:18:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:18:22,313 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:18:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:22,313 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:18:22,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:18:22,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:22,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:22,313 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:18:22,314 INFO L423 AbstractCegarLoop]: === Iteration 364 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:22,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:22,314 INFO L82 PathProgramCache]: Analyzing trace with hash -2096568512, now seen corresponding path program 348 times [2018-09-28 10:18:22,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:22,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:22,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:22,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:22,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:22,384 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:22,384 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:22,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:22,392 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:18:22,401 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:18:22,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:22,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:22,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:22,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:22,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:22,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:22,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:22,426 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:18:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:23,116 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:18:23,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:23,116 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:23,116 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:18:23,116 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:18:23,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:18:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2018-09-28 10:18:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:23,546 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:23,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:23,546 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:23,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:23,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:23,547 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:23,547 INFO L423 AbstractCegarLoop]: === Iteration 365 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:23,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2096566590, now seen corresponding path program 349 times [2018-09-28 10:18:23,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:23,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:23,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:23,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:23,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:23,615 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:23,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:23,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:23,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:23,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:23,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:23,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:23,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:23,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:23,651 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:24,353 INFO L93 Difference]: Finished difference Result 51 states and 73 transitions. [2018-09-28 10:18:24,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:24,353 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:24,353 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:18:24,353 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:18:24,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:24,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:18:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2018-09-28 10:18:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:18:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:18:24,775 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:18:24,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:24,775 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:18:24,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:18:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:24,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:24,775 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:24,775 INFO L423 AbstractCegarLoop]: === Iteration 366 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:24,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:24,776 INFO L82 PathProgramCache]: Analyzing trace with hash -2094721470, now seen corresponding path program 350 times [2018-09-28 10:18:24,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:24,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:24,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:24,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:24,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:24,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:24,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:24,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:18:24,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:18:24,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:24,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:24,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:24,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:24,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:24,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:24,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:24,882 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:18:25,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:25,555 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:18:25,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:25,555 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:25,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:25,556 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:18:25,556 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:18:25,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:25,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:18:25,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:18:25,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:25,983 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:25,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:25,983 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:25,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:25,983 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:25,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:25,983 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:18:25,984 INFO L423 AbstractCegarLoop]: === Iteration 367 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:25,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:25,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2094719548, now seen corresponding path program 351 times [2018-09-28 10:18:25,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:25,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:25,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:25,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:25,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:26,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:26,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:26,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:18:26,071 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:18:26,071 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:26,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:26,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:26,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:26,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:26,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:26,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:26,100 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:26,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:26,740 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:18:26,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:26,740 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:26,741 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:18:26,741 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:18:26,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:18:27,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 26. [2018-09-28 10:18:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:18:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 37 transitions. [2018-09-28 10:18:27,072 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 37 transitions. Word has length 19 [2018-09-28 10:18:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:27,072 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 37 transitions. [2018-09-28 10:18:27,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:27,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2018-09-28 10:18:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:27,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:27,073 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:27,073 INFO L423 AbstractCegarLoop]: === Iteration 368 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:27,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash 444397630, now seen corresponding path program 352 times [2018-09-28 10:18:27,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:27,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:27,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:27,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:27,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:27,157 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:27,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:27,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:27,164 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:18:27,177 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:18:27,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:27,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:27,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:27,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:27,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:27,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:27,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:27,200 INFO L87 Difference]: Start difference. First operand 26 states and 37 transitions. Second operand 11 states. [2018-09-28 10:18:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:27,858 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:18:27,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:27,858 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:27,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:27,858 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:18:27,858 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:18:27,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:18:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:18:28,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:28,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:28,304 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:28,305 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:28,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:28,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:28,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:28,305 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:18:28,305 INFO L423 AbstractCegarLoop]: === Iteration 369 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:28,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:28,305 INFO L82 PathProgramCache]: Analyzing trace with hash 444399552, now seen corresponding path program 353 times [2018-09-28 10:18:28,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:28,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:28,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:28,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:28,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:28,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:28,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:28,380 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:18:28,396 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:18:28,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:28,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:28,427 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:28,427 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:28,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:28,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:28,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:28,427 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:29,099 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:18:29,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:29,099 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:29,100 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:18:29,100 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:18:29,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:29,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:18:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:18:29,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:18:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:18:29,527 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:18:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:29,527 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:18:29,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:18:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:29,527 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:29,527 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:18:29,528 INFO L423 AbstractCegarLoop]: === Iteration 370 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:29,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:29,528 INFO L82 PathProgramCache]: Analyzing trace with hash 446244672, now seen corresponding path program 354 times [2018-09-28 10:18:29,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:29,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:29,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:29,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:29,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:29,595 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:29,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:29,602 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:18:29,613 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:18:29,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:29,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:29,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:29,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:29,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:29,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:29,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:29,637 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:18:30,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:30,277 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:18:30,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:30,277 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:30,278 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:18:30,278 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:18:30,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:18:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-28 10:18:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:30,715 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:30,715 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:30,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:30,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:30,716 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:30,716 INFO L423 AbstractCegarLoop]: === Iteration 371 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:30,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:30,716 INFO L82 PathProgramCache]: Analyzing trace with hash 446246594, now seen corresponding path program 355 times [2018-09-28 10:18:30,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:30,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:30,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:30,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:30,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:30,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:30,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:30,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:30,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:30,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:30,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:30,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:30,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:30,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:30,818 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:31,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:31,429 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:18:31,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:31,429 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:31,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:31,430 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:18:31,430 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:18:31,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:31,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:18:31,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2018-09-28 10:18:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:18:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:18:31,833 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:18:31,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:31,833 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:18:31,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:18:31,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:31,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:31,833 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:18:31,833 INFO L423 AbstractCegarLoop]: === Iteration 372 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:31,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2075562304, now seen corresponding path program 356 times [2018-09-28 10:18:31,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:31,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:31,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:31,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:31,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:31,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:31,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:31,910 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:18:31,919 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:18:31,919 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:31,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:31,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:31,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:31,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:31,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:31,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:31,944 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:18:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:32,608 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:18:32,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:32,608 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:32,609 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:18:32,609 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:18:32,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:18:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 34. [2018-09-28 10:18:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:33,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:33,049 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:33,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:33,050 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:33,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:33,050 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:33,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:33,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:33,050 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:33,050 INFO L423 AbstractCegarLoop]: === Iteration 373 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:33,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2075560382, now seen corresponding path program 357 times [2018-09-28 10:18:33,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:33,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:33,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:33,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:33,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:33,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:33,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:33,127 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:18:33,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:18:33,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:33,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:33,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:33,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:33,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:33,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:33,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:33,162 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:33,841 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2018-09-28 10:18:33,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:33,841 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:33,842 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:18:33,842 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:18:33,842 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:33,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:18:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2018-09-28 10:18:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:18:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:18:34,272 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:18:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:34,272 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:18:34,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:18:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:34,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:34,273 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:34,273 INFO L423 AbstractCegarLoop]: === Iteration 374 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:34,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:34,273 INFO L82 PathProgramCache]: Analyzing trace with hash -2073715262, now seen corresponding path program 358 times [2018-09-28 10:18:34,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:34,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:34,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:34,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:34,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:34,344 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:34,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:34,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:34,352 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:18:34,359 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:18:34,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:34,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:34,365 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:34,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:34,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:34,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:34,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:34,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:34,386 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:18:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:35,028 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2018-09-28 10:18:35,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:35,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:35,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:35,029 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:18:35,029 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:18:35,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:18:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2018-09-28 10:18:35,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:35,472 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:35,472 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:35,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:35,472 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:35,472 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:18:35,473 INFO L423 AbstractCegarLoop]: === Iteration 375 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:35,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:35,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2073713340, now seen corresponding path program 359 times [2018-09-28 10:18:35,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:35,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:35,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:35,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:35,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:35,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:35,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:35,550 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:18:35,562 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:18:35,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:35,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:35,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:35,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:35,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:35,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:35,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:35,586 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:36,198 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:18:36,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:36,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:36,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:36,199 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:18:36,199 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:18:36,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:18:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2018-09-28 10:18:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:18:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 40 transitions. [2018-09-28 10:18:36,572 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 40 transitions. Word has length 19 [2018-09-28 10:18:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:36,572 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 40 transitions. [2018-09-28 10:18:36,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:36,572 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 40 transitions. [2018-09-28 10:18:36,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:36,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:36,572 INFO L375 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1] [2018-09-28 10:18:36,573 INFO L423 AbstractCegarLoop]: === Iteration 376 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:36,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:36,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1124456000, now seen corresponding path program 360 times [2018-09-28 10:18:36,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:36,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:36,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:36,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:36,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:36,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:36,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:36,648 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:18:36,658 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:18:36,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:36,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:36,686 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:36,686 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:36,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:36,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:36,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:36,686 INFO L87 Difference]: Start difference. First operand 28 states and 40 transitions. Second operand 11 states. [2018-09-28 10:18:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:37,271 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:18:37,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:37,271 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:37,271 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:18:37,272 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:18:37,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:18:37,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-28 10:18:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:37,715 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:37,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:37,715 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:37,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:37,715 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:37,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:37,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:37,715 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:37,715 INFO L423 AbstractCegarLoop]: === Iteration 377 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:37,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:37,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1124457922, now seen corresponding path program 361 times [2018-09-28 10:18:37,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:37,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:37,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:37,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:37,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:37,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:37,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:37,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:37,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:37,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:37,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:37,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:37,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:37,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:37,829 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:38,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:38,408 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:18:38,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:38,408 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:38,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:38,409 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:18:38,409 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:18:38,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:38,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:18:38,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2018-09-28 10:18:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:18:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:18:38,847 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:18:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:38,848 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:18:38,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:18:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:38,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:38,848 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:38,848 INFO L423 AbstractCegarLoop]: === Iteration 378 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:38,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:38,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1126303042, now seen corresponding path program 362 times [2018-09-28 10:18:38,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:38,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:38,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:38,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:38,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:38,919 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:38,919 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:38,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:18:38,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:18:38,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:38,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:38,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:38,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:38,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:38,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:38,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:38,957 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:18:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:39,647 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2018-09-28 10:18:39,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:39,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:39,647 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:18:39,648 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:18:39,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:18:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2018-09-28 10:18:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:40,115 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:40,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:40,115 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:40,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:40,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:40,115 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:18:40,115 INFO L423 AbstractCegarLoop]: === Iteration 379 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:40,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:40,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1126304964, now seen corresponding path program 363 times [2018-09-28 10:18:40,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:40,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:40,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:40,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:40,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:40,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:40,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:40,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:18:40,213 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:18:40,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:40,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:40,236 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:40,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:40,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:40,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:40,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:40,237 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:40,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:40,829 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2018-09-28 10:18:40,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:40,829 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:40,830 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:18:40,830 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:18:40,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:18:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2018-09-28 10:18:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:18:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 43 transitions. [2018-09-28 10:18:41,242 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 43 transitions. Word has length 19 [2018-09-28 10:18:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:41,242 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 43 transitions. [2018-09-28 10:18:41,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 43 transitions. [2018-09-28 10:18:41,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:41,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:41,243 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1] [2018-09-28 10:18:41,243 INFO L423 AbstractCegarLoop]: === Iteration 380 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:41,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1395503934, now seen corresponding path program 364 times [2018-09-28 10:18:41,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:41,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:41,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:41,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:41,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:41,317 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:41,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:41,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:41,326 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:18:41,333 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:18:41,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:41,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:41,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:41,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:41,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:41,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:41,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:41,357 INFO L87 Difference]: Start difference. First operand 30 states and 43 transitions. Second operand 11 states. [2018-09-28 10:18:41,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:41,916 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:18:41,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:41,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:41,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:41,917 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:18:41,917 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:18:41,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:18:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-09-28 10:18:42,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:42,380 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:42,381 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:42,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:42,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:42,381 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:18:42,381 INFO L423 AbstractCegarLoop]: === Iteration 381 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:42,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:42,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1395502012, now seen corresponding path program 365 times [2018-09-28 10:18:42,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:42,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:42,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:42,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:42,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:42,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:42,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:42,504 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:18:42,516 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-09-28 10:18:42,517 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:42,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:42,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:42,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:42,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:42,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:42,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:42,541 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:43,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:43,081 INFO L93 Difference]: Finished difference Result 41 states and 58 transitions. [2018-09-28 10:18:43,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:43,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:43,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:43,082 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:18:43,082 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:18:43,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:43,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:18:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2018-09-28 10:18:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:18:43,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 46 transitions. [2018-09-28 10:18:43,521 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 46 transitions. Word has length 19 [2018-09-28 10:18:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:43,521 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 46 transitions. [2018-09-28 10:18:43,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:43,521 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 46 transitions. [2018-09-28 10:18:43,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:43,521 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:43,521 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:18:43,521 INFO L423 AbstractCegarLoop]: === Iteration 382 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:43,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:43,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1393656892, now seen corresponding path program 366 times [2018-09-28 10:18:43,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:43,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:43,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:43,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:43,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:43,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:43,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:43,598 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:18:43,607 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-09-28 10:18:43,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:43,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:43,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:43,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:43,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:43,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:43,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:43,633 INFO L87 Difference]: Start difference. First operand 32 states and 46 transitions. Second operand 11 states. [2018-09-28 10:18:44,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:44,159 INFO L93 Difference]: Finished difference Result 39 states and 55 transitions. [2018-09-28 10:18:44,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:44,159 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:44,160 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:18:44,160 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:18:44,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:44,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:18:44,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-09-28 10:18:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:18:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 49 transitions. [2018-09-28 10:18:44,608 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 49 transitions. Word has length 19 [2018-09-28 10:18:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:44,608 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 49 transitions. [2018-09-28 10:18:44,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 49 transitions. [2018-09-28 10:18:44,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:44,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:44,608 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:18:44,608 INFO L423 AbstractCegarLoop]: === Iteration 383 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:44,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:44,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1393654970, now seen corresponding path program 367 times [2018-09-28 10:18:44,609 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:44,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:44,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:44,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:44,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:44,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:44,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:44,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:44,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:44,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:44,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:44,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:44,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:44,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:44,721 INFO L87 Difference]: Start difference. First operand 34 states and 49 transitions. Second operand 11 states. [2018-09-28 10:18:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:45,227 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2018-09-28 10:18:45,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:45,227 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:45,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:45,228 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:18:45,228 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:18:45,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:18:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2018-09-28 10:18:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:18:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2018-09-28 10:18:45,504 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 19 [2018-09-28 10:18:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:45,504 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2018-09-28 10:18:45,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:45,504 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2018-09-28 10:18:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:45,504 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:45,505 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1] [2018-09-28 10:18:45,505 INFO L423 AbstractCegarLoop]: === Iteration 384 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:45,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:45,505 INFO L82 PathProgramCache]: Analyzing trace with hash 21654842, now seen corresponding path program 368 times [2018-09-28 10:18:45,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:45,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:45,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:45,506 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:18:45,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:45,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:45,583 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:45,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:45,597 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:18:45,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:18:45,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:45,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:45,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:45,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:45,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:45,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:45,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:45,627 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand 11 states. [2018-09-28 10:18:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:18:46,765 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2018-09-28 10:18:46,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:18:46,766 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2018-09-28 10:18:46,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:18:46,767 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:18:46,767 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:18:46,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:46,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:18:47,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 36. [2018-09-28 10:18:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:18:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-09-28 10:18:47,292 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 19 [2018-09-28 10:18:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:18:47,292 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 52 transitions. [2018-09-28 10:18:47,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:18:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 52 transitions. [2018-09-28 10:18:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:18:47,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:18:47,293 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1] [2018-09-28 10:18:47,293 INFO L423 AbstractCegarLoop]: === Iteration 385 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:18:47,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-28 10:18:47,294 INFO L82 PathProgramCache]: Analyzing trace with hash 21656764, now seen corresponding path program 369 times [2018-09-28 10:18:47,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:18:47,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:18:47,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:47,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:18:47,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:18:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:18:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:47,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:18:47,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:18:47,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:18:47,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:18:47,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:18:47,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:18:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:18:47,406 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:18:47,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:18:47,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:18:47,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:18:47,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-28 10:18:47,407 INFO L87 Difference]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. Received shutdown request... [2018-09-28 10:18:47,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:18:47,647 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:18:47,652 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:18:47,653 INFO L202 PluginConnector]: Adding new model Luxembourg-sophisticated.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:18:47 BoogieIcfgContainer [2018-09-28 10:18:47,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:18:47,654 INFO L168 Benchmark]: Toolchain (without parser) took 261504.37 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -445.6 MB). Free memory was 1.5 GB in the beginning and 941.2 MB in the end (delta: 518.7 MB). Peak memory consumption was 73.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:18:47,724 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:18:47,724 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.10 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:18:47,724 INFO L168 Benchmark]: Boogie Preprocessor took 25.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:18:47,725 INFO L168 Benchmark]: RCFGBuilder took 268.28 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:18:47,725 INFO L168 Benchmark]: TraceAbstraction took 261159.64 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -445.6 MB). Free memory was 1.4 GB in the beginning and 941.2 MB in the end (delta: 497.6 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. [2018-09-28 10:18:47,727 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 44.10 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 268.28 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 261159.64 ms. Allocated memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: -445.6 MB). Free memory was 1.4 GB in the beginning and 941.2 MB in the end (delta: 497.6 MB). Peak memory consumption was 51.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 29]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 29). Cancelled while BasicCegarLoop was constructing difference of abstraction (36states) and FLOYD_HOARE automaton (currently 6 states, 11 states before enhancement), while ReachableStatesComputation was computing reachable states (9 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 261.0s OverallTime, 385 OverallIterations, 8 TraceHistogramMax, 137.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1540 SDtfs, 2958 SDslu, 5284 SDs, 0 SdLazy, 8968 SolverSat, 4974 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9272 GetRequests, 6309 SyntacticMatches, 0 SemanticMatches, 2963 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=384, 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: 68.7s AutomataMinimizationTime, 384 MinimizatonAttempts, 5705 StatesRemovedByMinimization, 384 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 3.7s SatisfiabilityAnalysisTime, 37.8s InterpolantComputationTime, 12619 NumberOfCodeBlocks, 12619 NumberOfCodeBlocksAsserted, 2182 NumberOfCheckSat, 11850 ConstructedInterpolants, 0 QuantifiedInterpolants, 542280 SizeOfPredicates, 384 NumberOfNonLiveVariables, 16346 ConjunctsInSsa, 3346 ConjunctsInUnsatCore, 769 InterpolantComputations, 1 PerfectInterpolantSequences, 0/36084 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/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-18-47-736.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg-sophisticated.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-18-47-736.csv Completed graceful shutdown