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/Octopussy.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:54:41,233 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:54:41,238 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:54:41,250 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:54:41,250 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:54:41,251 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:54:41,253 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:54:41,254 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:54:41,256 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:54:41,257 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:54:41,258 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-02 11:54:41,258 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-02 11:54:41,259 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-02 11:54:41,261 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-02 11:54:41,265 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-02 11:54:41,266 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-02 11:54:41,267 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-02 11:54:41,269 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-02 11:54:41,274 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-02 11:54:41,280 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-02 11:54:41,281 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-02 11:54:41,284 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-02 11:54:41,286 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-02 11:54:41,301 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-02 11:54:41,319 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:54:41,320 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:54:41,321 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:54:41,321 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:54:41,322 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:54:41,323 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:54:41,323 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:54:41,323 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:54:41,323 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:54:41,323 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:54:41,324 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:54:41,324 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:54:41,324 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:54:41,324 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:54:41,325 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:54:41,325 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:54:41,325 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:54:41,325 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:54:41,325 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:54:41,326 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:54:41,326 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:54:41,326 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:54:41,326 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:54:41,326 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:54:41,327 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:54:41,327 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:54:41,327 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:54:41,327 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:54:41,327 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:54:41,329 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:54:41,388 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:54:41,403 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:54:41,410 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:54:41,413 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:54:41,414 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:54:41,414 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl [2018-10-02 11:54:41,415 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Octopussy.bpl' [2018-10-02 11:54:41,470 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:54:41,473 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:54:41,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:54:41,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:54:41,474 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:54:41,496 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:41" (1/1) ... [2018-10-02 11:54:41,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:41" (1/1) ... [2018-10-02 11:54:41,511 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-02 11:54:41,512 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-02 11:54:41,512 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-02 11:54:41,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:54:41,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:54:41,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:54:41,515 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:54:41,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:41" (1/1) ... [2018-10-02 11:54:41,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:41" (1/1) ... [2018-10-02 11:54:41,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:41" (1/1) ... [2018-10-02 11:54:41,527 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:41" (1/1) ... [2018-10-02 11:54:41,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:41" (1/1) ... [2018-10-02 11:54:41,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:41" (1/1) ... [2018-10-02 11:54:41,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:41" (1/1) ... [2018-10-02 11:54:41,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:54:41,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:54:41,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:54:41,536 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:54:41,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:54:41,612 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-02 11:54:41,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-02 11:54:41,612 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-02 11:54:41,832 INFO L337 CfgBuilder]: Using library mode [2018-10-02 11:54:41,833 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:54:41 BoogieIcfgContainer [2018-10-02 11:54:41,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:54:41,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:54:41,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:54:41,840 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:54:41,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:54:41" (1/2) ... [2018-10-02 11:54:41,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ef9d48 and model type Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:54:41, skipping insertion in model container [2018-10-02 11:54:41,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:54:41" (2/2) ... [2018-10-02 11:54:41,845 INFO L112 eAbstractionObserver]: Analyzing ICFG Octopussy.bpl [2018-10-02 11:54:41,857 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:54:41,869 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:54:41,929 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:54:41,930 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:54:41,930 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:54:41,930 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:54:41,930 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:54:41,931 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:54:41,931 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:54:41,931 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:54:41,931 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:54:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-02 11:54:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 11:54:41,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:41,964 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 11:54:41,965 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:41,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:41,972 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-10-02 11:54:41,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:41,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:42,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:42,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,117 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:54:42,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:54:42,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:54:42,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:54:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:54:42,138 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-02 11:54:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:42,185 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-02 11:54:42,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:54:42,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 11:54:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:42,198 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:54:42,198 INFO L226 Difference]: Without dead ends: 5 [2018-10-02 11:54:42,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:54:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-02 11:54:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-02 11:54:42,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-02 11:54:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-02 11:54:42,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-02 11:54:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:42,246 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-02 11:54:42,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:54:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-02 11:54:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 11:54:42,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:42,247 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 11:54:42,247 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:42,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:42,248 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-10-02 11:54:42,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:42,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:42,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:42,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:42,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:42,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:42,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:42,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-02 11:54:42,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:54:42,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:54:42,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:54:42,500 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-02 11:54:42,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:42,591 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-02 11:54:42,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:54:42,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-02 11:54:42,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:42,593 INFO L225 Difference]: With dead ends: 8 [2018-10-02 11:54:42,593 INFO L226 Difference]: Without dead ends: 6 [2018-10-02 11:54:42,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:54:42,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-02 11:54:42,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-02 11:54:42,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 11:54:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-02 11:54:42,599 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-02 11:54:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:42,600 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-02 11:54:42,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:54:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-02 11:54:42,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:54:42,602 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:42,602 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-02 11:54:42,603 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:42,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:42,603 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-10-02 11:54:42,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:42,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:42,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:42,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:42,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:42,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:42,888 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:42,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:42,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:42,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:42,914 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:54:42,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-02 11:54:42,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-02 11:54:42,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:54:42,916 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-02 11:54:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:42,951 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-02 11:54:42,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:54:42,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-02 11:54:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:42,952 INFO L225 Difference]: With dead ends: 9 [2018-10-02 11:54:42,952 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:54:42,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:54:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:54:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 11:54:42,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 11:54:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-02 11:54:42,956 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-02 11:54:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:42,956 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-02 11:54:42,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-02 11:54:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-02 11:54:42,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:54:42,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:42,957 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-02 11:54:42,958 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:42,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:42,958 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-10-02 11:54:42,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:42,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:42,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:42,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:43,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:43,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:43,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 11:54:43,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:43,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:43,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-02 11:54:43,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:54:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:54:43,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:54:43,141 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-02 11:54:43,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:43,200 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-02 11:54:43,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:54:43,201 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-02 11:54:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:43,201 INFO L225 Difference]: With dead ends: 10 [2018-10-02 11:54:43,201 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 11:54:43,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:54:43,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 11:54:43,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 11:54:43,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:54:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-02 11:54:43,205 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-02 11:54:43,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:43,205 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-02 11:54:43,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:54:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-02 11:54:43,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:54:43,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:43,206 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-02 11:54:43,207 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:43,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:43,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-10-02 11:54:43,207 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:43,207 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:43,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:43,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:43,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:43,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:43,509 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:43,528 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:43,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:43,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:43,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:54:43,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:54:43,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:54:43,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:54:43,560 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-02 11:54:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:43,597 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-02 11:54:43,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:54:43,598 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-02 11:54:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:43,598 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:54:43,598 INFO L226 Difference]: Without dead ends: 9 [2018-10-02 11:54:43,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:54:43,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-02 11:54:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-02 11:54:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:54:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-02 11:54:43,602 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-02 11:54:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:43,603 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-02 11:54:43,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:54:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-02 11:54:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:54:43,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:43,604 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-02 11:54:43,604 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:43,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:43,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-10-02 11:54:43,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:43,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:43,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:43,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:43,758 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:43,768 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:43,784 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 11:54:43,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:43,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:43,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:43,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-02 11:54:43,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:54:43,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:54:43,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:43,818 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-02 11:54:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:43,856 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-02 11:54:43,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:54:43,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-02 11:54:43,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:43,857 INFO L225 Difference]: With dead ends: 12 [2018-10-02 11:54:43,857 INFO L226 Difference]: Without dead ends: 10 [2018-10-02 11:54:43,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:54:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-02 11:54:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-02 11:54:43,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-02 11:54:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-02 11:54:43,861 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-02 11:54:43,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:43,862 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-02 11:54:43,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:54:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-02 11:54:43,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-02 11:54:43,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:43,862 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-02 11:54:43,863 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:43,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:43,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-10-02 11:54:43,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:43,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:43,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:43,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:44,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:44,106 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:44,115 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-02 11:54:44,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:44,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:44,154 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-02 11:54:44,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:54:44,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:54:44,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:44,155 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-02 11:54:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:44,196 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-02 11:54:44,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:54:44,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-02 11:54:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:44,197 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:54:44,197 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:54:44,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:54:44,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:54:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:54:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:54:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-02 11:54:44,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-02 11:54:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:44,201 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-02 11:54:44,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:54:44,201 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-02 11:54:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:54:44,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:44,202 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-02 11:54:44,202 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:44,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:44,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-10-02 11:54:44,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:44,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:44,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:44,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:44,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:44,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:44,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:44,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:54:44,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:54:44,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:54:44,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:44,403 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-02 11:54:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:44,654 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-02 11:54:44,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:54:44,655 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-02 11:54:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:44,655 INFO L225 Difference]: With dead ends: 14 [2018-10-02 11:54:44,656 INFO L226 Difference]: Without dead ends: 12 [2018-10-02 11:54:44,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:54:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-02 11:54:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-02 11:54:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-02 11:54:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-02 11:54:44,659 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-02 11:54:44,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:44,660 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-02 11:54:44,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:54:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-02 11:54:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-02 11:54:44,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:44,661 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-02 11:54:44,661 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:44,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-10-02 11:54:44,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:44,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:44,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,663 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:44,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:44,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:44,890 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:44,898 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:44,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:44,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:44,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:44,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:54:44,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:54:44,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:54:44,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:54:44,932 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-02 11:54:44,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:44,974 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-02 11:54:44,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:54:44,975 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-02 11:54:44,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:44,976 INFO L225 Difference]: With dead ends: 15 [2018-10-02 11:54:44,976 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:54:44,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:54:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:54:44,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:54:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:54:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-02 11:54:44,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-02 11:54:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:44,981 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-02 11:54:44,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:54:44,981 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-02 11:54:44,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:54:44,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:44,982 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-02 11:54:44,982 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:44,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:44,983 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-10-02 11:54:44,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:44,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:44,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:44,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:45,155 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:45,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:45,164 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:45,201 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:54:45,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:45,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:45,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:45,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 11:54:45,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:54:45,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:54:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:54:45,241 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-02 11:54:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:45,295 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-02 11:54:45,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:54:45,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-02 11:54:45,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:45,296 INFO L225 Difference]: With dead ends: 16 [2018-10-02 11:54:45,296 INFO L226 Difference]: Without dead ends: 14 [2018-10-02 11:54:45,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:54:45,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-02 11:54:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-02 11:54:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:54:45,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-02 11:54:45,300 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-02 11:54:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:45,301 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-02 11:54:45,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:54:45,301 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-02 11:54:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:54:45,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:45,302 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-02 11:54:45,302 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:45,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:45,302 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-10-02 11:54:45,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:45,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:45,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:45,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:45,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:45,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:45,655 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:45,666 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:45,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:45,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:45,706 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:45,707 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 11:54:45,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:54:45,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:54:45,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:54:45,708 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-02 11:54:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:45,766 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-02 11:54:45,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:54:45,767 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-02 11:54:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:45,767 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:54:45,767 INFO L226 Difference]: Without dead ends: 15 [2018-10-02 11:54:45,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:54:45,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-02 11:54:45,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-02 11:54:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-02 11:54:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-02 11:54:45,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-02 11:54:45,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:45,771 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-02 11:54:45,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:54:45,772 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-02 11:54:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-02 11:54:45,772 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:45,772 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-02 11:54:45,772 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:45,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:45,773 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-10-02 11:54:45,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:45,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:45,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:45,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:46,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:46,031 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:46,045 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-02 11:54:46,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:46,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:46,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:54:46,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:54:46,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:54:46,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:54:46,082 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-02 11:54:46,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:46,119 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-02 11:54:46,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:54:46,119 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-02 11:54:46,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:46,120 INFO L225 Difference]: With dead ends: 18 [2018-10-02 11:54:46,120 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 11:54:46,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:54:46,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 11:54:46,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 11:54:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:54:46,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-02 11:54:46,124 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-02 11:54:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:46,124 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-02 11:54:46,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:54:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-02 11:54:46,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:54:46,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:46,125 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-02 11:54:46,125 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:46,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:46,126 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-10-02 11:54:46,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:46,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:46,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:46,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:46,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:46,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:46,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:46,361 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-02 11:54:46,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:46,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:46,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 11:54:46,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:54:46,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:54:46,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:54:46,403 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-02 11:54:46,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:46,448 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-02 11:54:46,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:54:46,449 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-02 11:54:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:46,449 INFO L225 Difference]: With dead ends: 19 [2018-10-02 11:54:46,449 INFO L226 Difference]: Without dead ends: 17 [2018-10-02 11:54:46,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:54:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-02 11:54:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-02 11:54:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-02 11:54:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-02 11:54:46,455 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-02 11:54:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:46,455 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-02 11:54:46,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:54:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-02 11:54:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-02 11:54:46,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:46,456 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-02 11:54:46,456 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:46,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:46,457 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-10-02 11:54:46,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:46,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:46,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:46,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:46,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,724 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:46,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:46,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:46,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:46,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:46,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:54:46,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:54:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:54:46,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:54:46,781 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-02 11:54:46,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:46,987 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-02 11:54:46,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:54:46,987 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-02 11:54:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:46,988 INFO L225 Difference]: With dead ends: 20 [2018-10-02 11:54:46,988 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 11:54:46,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:54:46,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 11:54:46,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-02 11:54:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-02 11:54:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-02 11:54:46,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-02 11:54:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:46,993 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-02 11:54:46,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:54:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-02 11:54:46,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-02 11:54:46,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:46,994 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-02 11:54:46,994 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:46,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:46,995 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-10-02 11:54:46,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:46,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:46,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:46,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:46,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:47,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:47,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:47,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:47,349 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:47,350 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:47,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:47,385 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:47,385 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:54:47,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:54:47,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:54:47,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:54:47,386 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-02 11:54:47,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:47,724 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-02 11:54:47,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:54:47,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-02 11:54:47,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:47,725 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:54:47,726 INFO L226 Difference]: Without dead ends: 19 [2018-10-02 11:54:47,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:54:47,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-02 11:54:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-02 11:54:47,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-02 11:54:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-02 11:54:47,729 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-02 11:54:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:47,730 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-02 11:54:47,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:54:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-02 11:54:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-02 11:54:47,731 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:47,731 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-02 11:54:47,731 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:47,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-10-02 11:54:47,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:47,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:47,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:47,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:48,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:48,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:48,041 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:48,067 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-02 11:54:48,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:48,070 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:48,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:48,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 11:54:48,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:54:48,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:54:48,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:54:48,104 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-02 11:54:48,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:48,148 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-02 11:54:48,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:54:48,149 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-02 11:54:48,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:48,149 INFO L225 Difference]: With dead ends: 22 [2018-10-02 11:54:48,150 INFO L226 Difference]: Without dead ends: 20 [2018-10-02 11:54:48,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:54:48,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-02 11:54:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-02 11:54:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-02 11:54:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-02 11:54:48,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-02 11:54:48,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:48,155 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-02 11:54:48,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:54:48,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-02 11:54:48,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-02 11:54:48,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:48,156 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-02 11:54:48,156 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:48,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:48,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-10-02 11:54:48,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:48,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:48,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:48,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:48,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:48,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:48,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:48,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:48,796 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:48,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:48,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:48,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:48,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:54:48,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:54:48,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:54:48,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:54:48,841 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-02 11:54:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:48,932 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-02 11:54:48,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:54:48,932 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-02 11:54:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:48,933 INFO L225 Difference]: With dead ends: 23 [2018-10-02 11:54:48,933 INFO L226 Difference]: Without dead ends: 21 [2018-10-02 11:54:48,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:54:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-02 11:54:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-02 11:54:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-02 11:54:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-02 11:54:48,938 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-02 11:54:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:48,938 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-02 11:54:48,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:54:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-02 11:54:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-02 11:54:48,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:48,939 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-02 11:54:48,939 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:48,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:48,940 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-10-02 11:54:48,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:48,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:48,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:48,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:48,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:49,473 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:49,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:49,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:49,480 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:49,497 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-02 11:54:49,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:49,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:49,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:49,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:54:49,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:54:49,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:54:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:54:49,535 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-02 11:54:49,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:49,673 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-02 11:54:49,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:54:49,673 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-02 11:54:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:49,674 INFO L225 Difference]: With dead ends: 24 [2018-10-02 11:54:49,674 INFO L226 Difference]: Without dead ends: 22 [2018-10-02 11:54:49,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:54:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-02 11:54:49,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-02 11:54:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-02 11:54:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-02 11:54:49,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-02 11:54:49,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:49,683 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-02 11:54:49,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:54:49,683 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-02 11:54:49,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-02 11:54:49,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:49,684 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-02 11:54:49,684 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:49,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:49,687 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-10-02 11:54:49,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:49,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:49,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:49,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:49,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:50,152 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:50,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:50,163 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:50,176 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-02 11:54:50,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:50,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:50,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:50,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 11:54:50,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:54:50,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:54:50,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:54:50,211 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-02 11:54:50,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:50,292 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-02 11:54:50,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:54:50,293 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-02 11:54:50,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:50,293 INFO L225 Difference]: With dead ends: 25 [2018-10-02 11:54:50,293 INFO L226 Difference]: Without dead ends: 23 [2018-10-02 11:54:50,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:54:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-02 11:54:50,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-02 11:54:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-02 11:54:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-02 11:54:50,297 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-02 11:54:50,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:50,297 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-02 11:54:50,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:54:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-02 11:54:50,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-02 11:54:50,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:50,298 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-02 11:54:50,299 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:50,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:50,299 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-10-02 11:54:50,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:50,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:50,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:50,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:50,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:50,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:50,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:50,574 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:50,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:50,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:50,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:54:50,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:54:50,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:54:50,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:54:50,640 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-02 11:54:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:50,717 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-02 11:54:50,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:54:50,718 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-02 11:54:50,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:50,719 INFO L225 Difference]: With dead ends: 26 [2018-10-02 11:54:50,719 INFO L226 Difference]: Without dead ends: 24 [2018-10-02 11:54:50,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:54:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-02 11:54:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-02 11:54:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-02 11:54:50,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-02 11:54:50,723 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-02 11:54:50,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:50,723 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-02 11:54:50,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:54:50,724 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-02 11:54:50,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-02 11:54:50,724 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:50,724 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-02 11:54:50,725 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:50,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:50,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-10-02 11:54:50,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:50,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:50,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:50,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:50,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:50,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:50,993 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:50,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:51,001 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:51,013 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:51,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:51,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:51,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:54:51,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:54:51,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:54:51,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:54:51,059 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-02 11:54:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:51,171 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-02 11:54:51,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:54:51,171 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-02 11:54:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:51,172 INFO L225 Difference]: With dead ends: 27 [2018-10-02 11:54:51,172 INFO L226 Difference]: Without dead ends: 25 [2018-10-02 11:54:51,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:54:51,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-02 11:54:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-02 11:54:51,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:54:51,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-02 11:54:51,177 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-02 11:54:51,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:51,177 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-02 11:54:51,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:54:51,177 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-02 11:54:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:54:51,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:51,178 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-02 11:54:51,178 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:51,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:51,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-10-02 11:54:51,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:51,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:51,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:51,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,510 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:51,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:51,519 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:51,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 11:54:51,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:51,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,574 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:51,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 11:54:51,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:54:51,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:54:51,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:54:51,575 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-02 11:54:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:51,645 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-02 11:54:51,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:54:51,647 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-02 11:54:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:51,648 INFO L225 Difference]: With dead ends: 28 [2018-10-02 11:54:51,648 INFO L226 Difference]: Without dead ends: 26 [2018-10-02 11:54:51,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:54:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-02 11:54:51,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-02 11:54:51,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-02 11:54:51,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-02 11:54:51,652 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-02 11:54:51,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:51,652 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-02 11:54:51,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:54:51,652 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-02 11:54:51,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-02 11:54:51,653 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:51,653 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-02 11:54:51,653 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:51,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-10-02 11:54:51,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:51,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:51,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:51,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:51,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:51,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:51,947 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:51,983 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:51,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:51,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:52,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:52,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 11:54:52,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:54:52,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:54:52,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:54:52,031 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-02 11:54:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:52,161 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-02 11:54:52,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:54:52,163 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-02 11:54:52,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:52,163 INFO L225 Difference]: With dead ends: 29 [2018-10-02 11:54:52,163 INFO L226 Difference]: Without dead ends: 27 [2018-10-02 11:54:52,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:54:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-02 11:54:52,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-02 11:54:52,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-02 11:54:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-02 11:54:52,168 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-02 11:54:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:52,168 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-02 11:54:52,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:54:52,168 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-02 11:54:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-02 11:54:52,169 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:52,169 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-02 11:54:52,169 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:52,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:52,170 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-10-02 11:54:52,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:52,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:52,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:52,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:52,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:52,734 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:52,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:52,744 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:52,767 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-02 11:54:52,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:52,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:52,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:52,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:54:52,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:54:52,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:54:52,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:54:52,810 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-02 11:54:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:52,911 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-02 11:54:52,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:54:52,911 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-02 11:54:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:52,912 INFO L225 Difference]: With dead ends: 30 [2018-10-02 11:54:52,912 INFO L226 Difference]: Without dead ends: 28 [2018-10-02 11:54:52,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:54:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-02 11:54:52,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-02 11:54:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-02 11:54:52,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-02 11:54:52,916 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-02 11:54:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:52,916 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-02 11:54:52,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:54:52,917 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-02 11:54:52,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-02 11:54:52,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:52,918 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-02 11:54:52,918 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:52,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:52,918 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-10-02 11:54:52,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:52,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:52,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:52,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:52,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:53,708 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:53,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:53,716 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:53,736 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-02 11:54:53,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:53,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:53,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:53,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 11:54:53,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:54:53,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:54:53,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:54:53,780 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-02 11:54:53,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:53,820 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-02 11:54:53,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:54:53,821 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-02 11:54:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:53,821 INFO L225 Difference]: With dead ends: 31 [2018-10-02 11:54:53,822 INFO L226 Difference]: Without dead ends: 29 [2018-10-02 11:54:53,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:54:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-02 11:54:53,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-02 11:54:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-02 11:54:53,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-02 11:54:53,826 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-02 11:54:53,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:53,826 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-02 11:54:53,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:54:53,826 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-02 11:54:53,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-02 11:54:53,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:53,827 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-02 11:54:53,827 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:53,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:53,828 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-10-02 11:54:53,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:53,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:53,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:53,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:53,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:54,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:54,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:54,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:54,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:54,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:54,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:54:54,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:54:54,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:54:54,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:54:54,420 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-02 11:54:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:54,495 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-02 11:54:54,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:54:54,496 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-02 11:54:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:54,496 INFO L225 Difference]: With dead ends: 32 [2018-10-02 11:54:54,496 INFO L226 Difference]: Without dead ends: 30 [2018-10-02 11:54:54,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:54:54,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-02 11:54:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-02 11:54:54,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-02 11:54:54,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-02 11:54:54,500 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-02 11:54:54,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:54,501 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-02 11:54:54,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:54:54,501 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-02 11:54:54,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-02 11:54:54,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:54,502 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-02 11:54:54,502 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:54,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:54,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-10-02 11:54:54,502 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:54,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:54,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:54,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:54,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:55,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:55,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:55,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:54:55,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:54:55,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:55,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:55,898 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:55,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:54:55,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:54:55,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:54:55,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:54:55,900 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-02 11:54:56,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:56,070 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-02 11:54:56,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:54:56,071 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-02 11:54:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:56,072 INFO L225 Difference]: With dead ends: 33 [2018-10-02 11:54:56,072 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:54:56,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:54:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:54:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-02 11:54:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-02 11:54:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-02 11:54:56,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-02 11:54:56,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:56,078 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-02 11:54:56,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:54:56,079 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-02 11:54:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-02 11:54:56,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:56,079 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-02 11:54:56,080 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:56,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:56,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-10-02 11:54:56,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:56,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:56,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:56,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:56,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:56,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:56,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:54:56,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-02 11:54:56,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:56,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:56,668 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:56,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 11:54:56,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:54:56,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:54:56,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:54:56,670 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-02 11:54:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:56,700 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-02 11:54:56,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:54:56,701 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-02 11:54:56,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:56,701 INFO L225 Difference]: With dead ends: 34 [2018-10-02 11:54:56,701 INFO L226 Difference]: Without dead ends: 32 [2018-10-02 11:54:56,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:54:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-02 11:54:56,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-02 11:54:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-02 11:54:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-02 11:54:56,706 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-02 11:54:56,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:56,707 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-02 11:54:56,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:54:56,707 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-02 11:54:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-02 11:54:56,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:56,707 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-02 11:54:56,708 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:56,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:56,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-10-02 11:54:56,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:56,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:56,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:56,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:57,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:57,157 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:54:57,176 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:54:57,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:57,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:57,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:54:57,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:54:57,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:54:57,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:54:57,217 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-02 11:54:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:57,293 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-02 11:54:57,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:54:57,293 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-02 11:54:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:57,294 INFO L225 Difference]: With dead ends: 35 [2018-10-02 11:54:57,294 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:54:57,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:54:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:54:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-02 11:54:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-02 11:54:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-02 11:54:57,298 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-02 11:54:57,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:57,299 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-02 11:54:57,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:54:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-02 11:54:57,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-02 11:54:57,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:57,299 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-02 11:54:57,300 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:57,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:57,300 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-10-02 11:54:57,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:57,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:57,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:57,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:57,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,807 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:57,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:57,814 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:54:57,836 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-02 11:54:57,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:57,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:57,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:57,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:54:57,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:54:57,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:54:57,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:54:57,879 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-02 11:54:58,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:58,085 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-02 11:54:58,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:54:58,086 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-02 11:54:58,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:58,086 INFO L225 Difference]: With dead ends: 36 [2018-10-02 11:54:58,087 INFO L226 Difference]: Without dead ends: 34 [2018-10-02 11:54:58,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:54:58,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-02 11:54:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-02 11:54:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-02 11:54:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-02 11:54:58,091 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-02 11:54:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:58,091 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-02 11:54:58,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:54:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-02 11:54:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-02 11:54:58,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:58,092 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-02 11:54:58,092 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:58,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-10-02 11:54:58,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:58,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:58,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:58,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:58,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:58,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:58,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:58,677 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:54:58,709 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-02 11:54:58,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:54:58,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:58,725 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:58,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:58,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 11:54:58,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:54:58,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:54:58,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:54:58,753 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-02 11:54:58,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:58,819 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-02 11:54:58,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:54:58,819 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-02 11:54:58,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:58,820 INFO L225 Difference]: With dead ends: 37 [2018-10-02 11:54:58,821 INFO L226 Difference]: Without dead ends: 35 [2018-10-02 11:54:58,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:54:58,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-02 11:54:58,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-02 11:54:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-02 11:54:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-02 11:54:58,826 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-02 11:54:58,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:58,826 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-02 11:54:58,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:54:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-02 11:54:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-02 11:54:58,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:58,827 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-02 11:54:58,827 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:58,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:58,828 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-10-02 11:54:58,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:58,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:58,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:58,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:54:58,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:59,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:54:59,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:54:59,417 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:54:59,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:54:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:54:59,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:54:59,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:54:59,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:54:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:54:59,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:54:59,477 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-02 11:54:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:54:59,609 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-02 11:54:59,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:54:59,610 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-02 11:54:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:54:59,610 INFO L225 Difference]: With dead ends: 38 [2018-10-02 11:54:59,610 INFO L226 Difference]: Without dead ends: 36 [2018-10-02 11:54:59,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:54:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-02 11:54:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-02 11:54:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 11:54:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-02 11:54:59,615 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-02 11:54:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:54:59,615 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-02 11:54:59,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:54:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-02 11:54:59,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 11:54:59,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:54:59,616 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-02 11:54:59,616 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:54:59,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:54:59,617 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-10-02 11:54:59,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:54:59,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:54:59,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:59,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:54:59,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:54:59,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:00,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:00,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:00,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:00,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:00,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:00,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:00,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:00,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:55:00,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:55:00,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:55:00,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:55:00,485 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-02 11:55:00,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:00,544 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-02 11:55:00,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:55:00,544 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-02 11:55:00,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:00,545 INFO L225 Difference]: With dead ends: 39 [2018-10-02 11:55:00,545 INFO L226 Difference]: Without dead ends: 37 [2018-10-02 11:55:00,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:55:00,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-02 11:55:00,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-02 11:55:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-02 11:55:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-02 11:55:00,549 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-02 11:55:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:00,549 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-02 11:55:00,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:55:00,549 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-02 11:55:00,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-02 11:55:00,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:00,550 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-02 11:55:00,550 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:00,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:00,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-10-02 11:55:00,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:00,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:00,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:00,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:00,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:01,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:01,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:01,067 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:01,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-02 11:55:01,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:01,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:01,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:01,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 11:55:01,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:55:01,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:55:01,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:55:01,137 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-02 11:55:01,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:01,210 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-02 11:55:01,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:55:01,211 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-02 11:55:01,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:01,211 INFO L225 Difference]: With dead ends: 40 [2018-10-02 11:55:01,212 INFO L226 Difference]: Without dead ends: 38 [2018-10-02 11:55:01,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:55:01,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-02 11:55:01,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-02 11:55:01,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-02 11:55:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-02 11:55:01,215 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-02 11:55:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:01,215 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-02 11:55:01,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:55:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-02 11:55:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-02 11:55:01,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:01,216 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-02 11:55:01,216 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:01,216 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:01,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-10-02 11:55:01,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:01,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:01,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:01,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:01,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:01,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:01,776 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:01,800 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:01,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:01,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:01,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:01,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:55:01,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:55:01,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:55:01,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:55:01,841 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-02 11:55:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:01,942 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-02 11:55:01,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:55:01,942 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-02 11:55:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:01,943 INFO L225 Difference]: With dead ends: 41 [2018-10-02 11:55:01,943 INFO L226 Difference]: Without dead ends: 39 [2018-10-02 11:55:01,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:55:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-02 11:55:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-02 11:55:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-02 11:55:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-02 11:55:01,947 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-02 11:55:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:01,947 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-02 11:55:01,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:55:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-02 11:55:01,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-02 11:55:01,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:01,948 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-02 11:55:01,948 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:01,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:01,949 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-10-02 11:55:01,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:01,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:01,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:01,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:02,619 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:02,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:02,626 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:02,652 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-02 11:55:02,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:02,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:02,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:02,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:55:02,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:55:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:55:02,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:55:02,688 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-02 11:55:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:02,763 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-02 11:55:02,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:55:02,763 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-02 11:55:02,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:02,764 INFO L225 Difference]: With dead ends: 42 [2018-10-02 11:55:02,764 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 11:55:02,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:55:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 11:55:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 11:55:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 11:55:02,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-02 11:55:02,768 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-02 11:55:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:02,768 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-02 11:55:02,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:55:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-02 11:55:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 11:55:02,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:02,769 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-02 11:55:02,769 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:02,769 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:02,769 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-10-02 11:55:02,769 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:02,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:02,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:02,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:02,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:03,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:03,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:03,796 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:03,829 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-02 11:55:03,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:03,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:03,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:03,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 11:55:03,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:55:03,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:55:03,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:55:03,874 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-02 11:55:04,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:04,347 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-02 11:55:04,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:55:04,348 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-02 11:55:04,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:04,348 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:55:04,349 INFO L226 Difference]: Without dead ends: 41 [2018-10-02 11:55:04,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:55:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-02 11:55:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-02 11:55:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:55:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-02 11:55:04,352 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-02 11:55:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:04,352 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-02 11:55:04,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:55:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-02 11:55:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:55:04,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:04,353 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-02 11:55:04,353 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:04,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:04,353 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-10-02 11:55:04,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:04,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:04,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:04,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:04,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:05,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:05,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:05,270 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:05,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:05,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:05,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:55:05,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:55:05,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:55:05,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:55:05,332 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-02 11:55:05,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:05,414 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-02 11:55:05,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:55:05,415 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-02 11:55:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:05,416 INFO L225 Difference]: With dead ends: 44 [2018-10-02 11:55:05,416 INFO L226 Difference]: Without dead ends: 42 [2018-10-02 11:55:05,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:55:05,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-02 11:55:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-02 11:55:05,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-02 11:55:05,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-02 11:55:05,419 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-02 11:55:05,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:05,419 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-02 11:55:05,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:55:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-02 11:55:05,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-02 11:55:05,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:05,420 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-02 11:55:05,420 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:05,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:05,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-10-02 11:55:05,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:05,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:05,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:05,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:05,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:06,006 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:06,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:06,039 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:06,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:06,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:06,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:55:06,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:55:06,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:55:06,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:55:06,079 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-02 11:55:06,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:06,154 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-02 11:55:06,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:55:06,155 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-02 11:55:06,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:06,155 INFO L225 Difference]: With dead ends: 45 [2018-10-02 11:55:06,156 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:55:06,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:55:06,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:55:06,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-02 11:55:06,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-02 11:55:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-02 11:55:06,159 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-02 11:55:06,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:06,159 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-02 11:55:06,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:55:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-02 11:55:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-02 11:55:06,160 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:06,160 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-02 11:55:06,160 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:06,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:06,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-10-02 11:55:06,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:06,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:06,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:06,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:06,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,849 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:06,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:06,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:06,892 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-02 11:55:06,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:06,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:06,925 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:06,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 11:55:06,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:55:06,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:55:06,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:55:06,926 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-02 11:55:06,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:06,995 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-02 11:55:06,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:55:06,995 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-02 11:55:06,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:06,996 INFO L225 Difference]: With dead ends: 46 [2018-10-02 11:55:06,996 INFO L226 Difference]: Without dead ends: 44 [2018-10-02 11:55:06,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:55:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-02 11:55:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-02 11:55:06,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-02 11:55:06,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-02 11:55:06,999 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-02 11:55:06,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:06,999 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-02 11:55:06,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:55:07,000 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-02 11:55:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-02 11:55:07,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:07,000 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-02 11:55:07,000 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:07,000 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:07,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-10-02 11:55:07,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:07,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:07,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:07,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:07,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:07,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:07,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:07,697 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:07,721 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:07,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:07,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:07,733 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:07,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:07,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:55:07,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:55:07,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:55:07,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:55:07,760 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-02 11:55:07,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:07,857 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-02 11:55:07,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:55:07,858 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-02 11:55:07,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:07,858 INFO L225 Difference]: With dead ends: 47 [2018-10-02 11:55:07,859 INFO L226 Difference]: Without dead ends: 45 [2018-10-02 11:55:07,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:55:07,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-02 11:55:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-02 11:55:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-02 11:55:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-02 11:55:07,862 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-02 11:55:07,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:07,862 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-02 11:55:07,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:55:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-02 11:55:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-02 11:55:07,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:07,863 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-02 11:55:07,863 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:07,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-10-02 11:55:07,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:07,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:07,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:07,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:07,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:08,949 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:08,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:08,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:08,958 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:08,992 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-02 11:55:08,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:08,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:09,006 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:09,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:09,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:55:09,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:55:09,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:55:09,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:55:09,027 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-02 11:55:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:09,081 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-02 11:55:09,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:55:09,081 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-02 11:55:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:09,082 INFO L225 Difference]: With dead ends: 48 [2018-10-02 11:55:09,082 INFO L226 Difference]: Without dead ends: 46 [2018-10-02 11:55:09,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:55:09,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-02 11:55:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-02 11:55:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-02 11:55:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-02 11:55:09,085 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-02 11:55:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:09,085 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-02 11:55:09,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:55:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-02 11:55:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-02 11:55:09,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:09,086 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-02 11:55:09,086 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:09,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:09,086 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-10-02 11:55:09,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:09,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:09,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:09,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:09,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:10,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:10,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:10,286 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:10,327 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-02 11:55:10,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:10,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:10,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:10,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 11:55:10,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:55:10,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:55:10,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:55:10,362 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-02 11:55:10,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:10,443 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-02 11:55:10,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:55:10,444 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-02 11:55:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:10,444 INFO L225 Difference]: With dead ends: 49 [2018-10-02 11:55:10,444 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:55:10,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:55:10,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:55:10,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:55:10,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:55:10,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-02 11:55:10,448 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-02 11:55:10,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:10,448 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-02 11:55:10,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:55:10,448 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-02 11:55:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:55:10,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:10,449 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-02 11:55:10,449 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:10,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:10,449 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-10-02 11:55:10,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:10,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:10,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:10,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:10,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:10,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:11,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:11,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:11,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:11,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:11,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:11,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:55:11,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:55:11,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:55:11,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:55:11,299 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-02 11:55:11,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:11,443 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-02 11:55:11,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:55:11,443 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-02 11:55:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:11,444 INFO L225 Difference]: With dead ends: 50 [2018-10-02 11:55:11,444 INFO L226 Difference]: Without dead ends: 48 [2018-10-02 11:55:11,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:55:11,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-02 11:55:11,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-02 11:55:11,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-02 11:55:11,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-02 11:55:11,447 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-02 11:55:11,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:11,447 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-02 11:55:11,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:55:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-02 11:55:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-02 11:55:11,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:11,448 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-02 11:55:11,448 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:11,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:11,448 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-10-02 11:55:11,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:11,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:11,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:11,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:11,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:12,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:12,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:12,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:12,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:12,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:12,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:12,298 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:12,317 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:12,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:55:12,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:55:12,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:55:12,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:55:12,319 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-02 11:55:12,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:12,374 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-02 11:55:12,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:55:12,375 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-02 11:55:12,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:12,375 INFO L225 Difference]: With dead ends: 51 [2018-10-02 11:55:12,376 INFO L226 Difference]: Without dead ends: 49 [2018-10-02 11:55:12,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:55:12,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-02 11:55:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-02 11:55:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-02 11:55:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-02 11:55:12,380 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-02 11:55:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:12,380 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-02 11:55:12,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:55:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-02 11:55:12,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-02 11:55:12,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:12,381 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-02 11:55:12,381 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:12,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:12,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-10-02 11:55:12,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:12,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:12,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:12,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:12,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:13,503 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:13,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:13,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:13,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-02 11:55:13,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:13,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:13,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:13,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:55:13,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:55:13,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:55:13,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:55:13,592 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-02 11:55:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:13,995 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-02 11:55:13,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:55:13,996 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-02 11:55:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:13,996 INFO L225 Difference]: With dead ends: 52 [2018-10-02 11:55:13,997 INFO L226 Difference]: Without dead ends: 50 [2018-10-02 11:55:13,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:55:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-02 11:55:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-02 11:55:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-02 11:55:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-02 11:55:14,000 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-02 11:55:14,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:14,000 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-02 11:55:14,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:55:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-02 11:55:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-02 11:55:14,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:14,001 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-02 11:55:14,001 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:14,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:14,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-10-02 11:55:14,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:14,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:14,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:14,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:14,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:15,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:15,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:15,547 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:15,576 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:15,576 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:15,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:15,618 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:15,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 11:55:15,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:55:15,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:55:15,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:55:15,620 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-02 11:55:15,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:15,695 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-02 11:55:15,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:55:15,695 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-02 11:55:15,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:15,696 INFO L225 Difference]: With dead ends: 53 [2018-10-02 11:55:15,696 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:55:15,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:55:15,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:55:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-02 11:55:15,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-02 11:55:15,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-02 11:55:15,699 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-02 11:55:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:15,699 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-02 11:55:15,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:55:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-02 11:55:15,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-02 11:55:15,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:15,700 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-02 11:55:15,700 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:15,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:15,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-10-02 11:55:15,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:15,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:15,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:15,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:15,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:16,755 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:16,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:16,762 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:16,798 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-02 11:55:16,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:16,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:16,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:16,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:55:16,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:55:16,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:55:16,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:55:16,835 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-02 11:55:16,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:16,897 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-02 11:55:16,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:55:16,898 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-02 11:55:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:16,899 INFO L225 Difference]: With dead ends: 54 [2018-10-02 11:55:16,899 INFO L226 Difference]: Without dead ends: 52 [2018-10-02 11:55:16,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:55:16,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-02 11:55:16,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-02 11:55:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-02 11:55:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-02 11:55:16,903 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-02 11:55:16,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:16,903 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-02 11:55:16,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:55:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-02 11:55:16,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-02 11:55:16,904 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:16,904 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-02 11:55:16,904 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:16,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:16,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-10-02 11:55:16,905 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:16,905 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:16,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:16,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:16,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:17,860 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:17,860 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:17,867 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:17,904 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-02 11:55:17,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:17,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:17,939 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:17,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 11:55:17,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:55:17,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:55:17,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:55:17,941 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-02 11:55:18,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:18,018 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-02 11:55:18,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:55:18,019 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-02 11:55:18,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:18,019 INFO L225 Difference]: With dead ends: 55 [2018-10-02 11:55:18,019 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:55:18,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:55:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:55:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 11:55:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 11:55:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-02 11:55:18,024 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-02 11:55:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:18,025 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-02 11:55:18,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:55:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-02 11:55:18,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:55:18,026 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:18,026 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-02 11:55:18,026 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:18,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:18,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-10-02 11:55:18,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:18,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:18,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:18,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:18,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:20,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:20,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:20,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:20,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:20,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:20,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:20,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:55:20,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:55:20,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:55:20,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:55:20,093 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-02 11:55:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:20,175 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-02 11:55:20,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:55:20,175 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-02 11:55:20,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:20,176 INFO L225 Difference]: With dead ends: 56 [2018-10-02 11:55:20,176 INFO L226 Difference]: Without dead ends: 54 [2018-10-02 11:55:20,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:55:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-02 11:55:20,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-02 11:55:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 11:55:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-02 11:55:20,180 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-02 11:55:20,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:20,180 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-02 11:55:20,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:55:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-02 11:55:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 11:55:20,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:20,181 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-02 11:55:20,181 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:20,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:20,181 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-10-02 11:55:20,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:20,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:20,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:20,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:20,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:21,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:21,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:21,434 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:21,470 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:21,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:21,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:21,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:21,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 11:55:21,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:55:21,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:55:21,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:55:21,512 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-02 11:55:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:21,610 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-02 11:55:21,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:55:21,611 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-02 11:55:21,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:21,612 INFO L225 Difference]: With dead ends: 57 [2018-10-02 11:55:21,612 INFO L226 Difference]: Without dead ends: 55 [2018-10-02 11:55:21,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:55:21,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-02 11:55:21,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-02 11:55:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-02 11:55:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-02 11:55:21,616 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-02 11:55:21,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:21,616 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-02 11:55:21,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:55:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-02 11:55:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-02 11:55:21,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:21,617 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-02 11:55:21,617 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:21,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-10-02 11:55:21,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:21,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:21,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:21,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:22,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:22,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:22,817 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:22,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-02 11:55:22,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:22,864 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:22,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:22,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 11:55:22,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:55:22,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:55:22,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:55:22,906 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-02 11:55:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:23,047 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-02 11:55:23,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:55:23,047 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-02 11:55:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:23,048 INFO L225 Difference]: With dead ends: 58 [2018-10-02 11:55:23,048 INFO L226 Difference]: Without dead ends: 56 [2018-10-02 11:55:23,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:55:23,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-02 11:55:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-02 11:55:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-02 11:55:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-02 11:55:23,052 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-02 11:55:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:23,052 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-02 11:55:23,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:55:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-02 11:55:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-02 11:55:23,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:23,053 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-02 11:55:23,053 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:23,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-10-02 11:55:23,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:23,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:23,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:23,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:23,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:24,329 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:24,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:24,336 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:24,367 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:24,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:24,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:24,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:24,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 11:55:24,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:55:24,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:55:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:55:24,408 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-02 11:55:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:24,506 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-02 11:55:24,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:55:24,506 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-02 11:55:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:24,507 INFO L225 Difference]: With dead ends: 59 [2018-10-02 11:55:24,507 INFO L226 Difference]: Without dead ends: 57 [2018-10-02 11:55:24,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:55:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-02 11:55:24,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-02 11:55:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-02 11:55:24,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-02 11:55:24,511 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-02 11:55:24,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:24,511 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-02 11:55:24,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:55:24,511 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-02 11:55:24,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-02 11:55:24,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:24,512 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-02 11:55:24,512 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:24,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:24,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-10-02 11:55:24,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:24,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:24,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:24,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:24,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:24,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:26,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:26,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:26,034 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:26,079 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-02 11:55:26,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:26,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:26,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:26,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:26,115 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 11:55:26,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:55:26,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:55:26,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:55:26,116 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-02 11:55:26,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:26,206 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-02 11:55:26,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:55:26,207 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-02 11:55:26,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:26,208 INFO L225 Difference]: With dead ends: 60 [2018-10-02 11:55:26,208 INFO L226 Difference]: Without dead ends: 58 [2018-10-02 11:55:26,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:55:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-02 11:55:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-02 11:55:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-02 11:55:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-02 11:55:26,211 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-02 11:55:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:26,212 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-02 11:55:26,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:55:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-02 11:55:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-02 11:55:26,212 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:26,212 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-02 11:55:26,212 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:26,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-10-02 11:55:26,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:26,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:26,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:26,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:26,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:27,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:27,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:27,361 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:27,403 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-02 11:55:27,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:27,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:27,448 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:27,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 11:55:27,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 11:55:27,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 11:55:27,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:55:27,450 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-02 11:55:27,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:27,580 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-02 11:55:27,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:55:27,580 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-02 11:55:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:27,581 INFO L225 Difference]: With dead ends: 61 [2018-10-02 11:55:27,581 INFO L226 Difference]: Without dead ends: 59 [2018-10-02 11:55:27,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:55:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-02 11:55:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-02 11:55:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-02 11:55:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-02 11:55:27,584 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-02 11:55:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:27,585 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-02 11:55:27,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 11:55:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-02 11:55:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-02 11:55:27,585 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:27,585 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-02 11:55:27,586 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:27,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:27,586 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-10-02 11:55:27,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:27,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:27,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:27,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:27,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:28,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:28,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:28,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:28,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:28,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:28,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 11:55:28,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:55:28,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:55:28,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:55:28,942 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-02 11:55:29,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:29,028 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-02 11:55:29,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:55:29,029 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-02 11:55:29,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:29,030 INFO L225 Difference]: With dead ends: 62 [2018-10-02 11:55:29,030 INFO L226 Difference]: Without dead ends: 60 [2018-10-02 11:55:29,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:55:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-02 11:55:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-02 11:55:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-02 11:55:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-02 11:55:29,034 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-02 11:55:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:29,035 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-02 11:55:29,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:55:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-02 11:55:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-02 11:55:29,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:29,035 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-02 11:55:29,036 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:29,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:29,036 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-10-02 11:55:29,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:29,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:29,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:29,036 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:29,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:30,275 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:30,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:30,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:30,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:30,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:30,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:30,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:30,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 11:55:30,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:55:30,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:55:30,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:55:30,362 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-02 11:55:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:30,666 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-02 11:55:30,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:55:30,667 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-02 11:55:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:30,667 INFO L225 Difference]: With dead ends: 63 [2018-10-02 11:55:30,667 INFO L226 Difference]: Without dead ends: 61 [2018-10-02 11:55:30,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:55:30,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-02 11:55:30,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-02 11:55:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-02 11:55:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-02 11:55:30,670 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-02 11:55:30,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:30,671 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-02 11:55:30,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:55:30,671 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-02 11:55:30,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-02 11:55:30,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:30,672 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-02 11:55:30,672 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:30,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:30,673 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-10-02 11:55:30,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:30,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:30,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:30,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:30,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:31,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:31,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:31,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:31,996 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-02 11:55:31,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:31,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:32,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:32,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-02 11:55:32,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:55:32,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:55:32,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:55:32,035 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-02 11:55:32,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:32,131 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-02 11:55:32,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:55:32,131 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-02 11:55:32,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:32,132 INFO L225 Difference]: With dead ends: 64 [2018-10-02 11:55:32,132 INFO L226 Difference]: Without dead ends: 62 [2018-10-02 11:55:32,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:55:32,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-02 11:55:32,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-02 11:55:32,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-02 11:55:32,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-02 11:55:32,135 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-02 11:55:32,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:32,136 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-02 11:55:32,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:55:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-02 11:55:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-02 11:55:32,136 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:32,136 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-02 11:55:32,137 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:32,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:32,137 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-10-02 11:55:32,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:32,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:32,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:32,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:32,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:33,871 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:33,871 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:33,884 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:33,924 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:33,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:33,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:33,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:33,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-02 11:55:33,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 11:55:33,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 11:55:33,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:55:33,970 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-02 11:55:34,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:34,073 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-02 11:55:34,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:55:34,073 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-02 11:55:34,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:34,074 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:55:34,075 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:55:34,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:55:34,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:55:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-02 11:55:34,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-02 11:55:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-02 11:55:34,079 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-02 11:55:34,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:34,079 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-02 11:55:34,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 11:55:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-02 11:55:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-02 11:55:34,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:34,079 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-02 11:55:34,080 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:34,080 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:34,080 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-10-02 11:55:34,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:34,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:34,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:34,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:34,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:36,223 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:36,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:36,231 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:36,282 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-02 11:55:36,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:36,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:36,332 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:36,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 11:55:36,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:55:36,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:55:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:55:36,333 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-02 11:55:36,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:36,435 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-02 11:55:36,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:55:36,436 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-02 11:55:36,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:36,437 INFO L225 Difference]: With dead ends: 66 [2018-10-02 11:55:36,437 INFO L226 Difference]: Without dead ends: 64 [2018-10-02 11:55:36,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:55:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-02 11:55:36,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-02 11:55:36,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-02 11:55:36,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-02 11:55:36,440 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-02 11:55:36,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:36,441 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-02 11:55:36,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:55:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-02 11:55:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-02 11:55:36,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:36,441 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-02 11:55:36,441 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:36,441 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-10-02 11:55:36,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:36,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:36,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:36,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:36,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:37,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:37,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:37,883 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:37,932 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-02 11:55:37,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:37,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:37,982 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:37,982 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-02 11:55:37,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 11:55:37,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 11:55:37,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:55:37,984 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-02 11:55:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:38,144 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-02 11:55:38,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:55:38,145 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-02 11:55:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:38,145 INFO L225 Difference]: With dead ends: 67 [2018-10-02 11:55:38,146 INFO L226 Difference]: Without dead ends: 65 [2018-10-02 11:55:38,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:55:38,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-02 11:55:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-02 11:55:38,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-02 11:55:38,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-02 11:55:38,150 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-02 11:55:38,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:38,150 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-02 11:55:38,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 11:55:38,150 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-02 11:55:38,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-02 11:55:38,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:38,150 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-02 11:55:38,151 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:38,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:38,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-10-02 11:55:38,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:38,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:38,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:38,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:38,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:39,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:39,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:39,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:39,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:39,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:39,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 11:55:39,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:55:39,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:55:39,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:55:39,706 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-02 11:55:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:39,803 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-02 11:55:39,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:55:39,803 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-02 11:55:39,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:39,804 INFO L225 Difference]: With dead ends: 68 [2018-10-02 11:55:39,804 INFO L226 Difference]: Without dead ends: 66 [2018-10-02 11:55:39,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:55:39,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-02 11:55:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-02 11:55:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-02 11:55:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-02 11:55:39,808 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-02 11:55:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:39,808 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-02 11:55:39,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:55:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-02 11:55:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-02 11:55:39,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:39,809 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-02 11:55:39,809 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:39,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:39,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-10-02 11:55:39,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:39,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:39,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:39,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:39,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:42,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:42,247 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:42,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:42,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:42,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:42,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:42,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:42,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-02 11:55:42,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:55:42,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:55:42,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:55:42,336 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-02 11:55:42,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:42,506 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-02 11:55:42,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:55:42,513 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-02 11:55:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:42,513 INFO L225 Difference]: With dead ends: 69 [2018-10-02 11:55:42,513 INFO L226 Difference]: Without dead ends: 67 [2018-10-02 11:55:42,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:55:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-02 11:55:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-02 11:55:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-02 11:55:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-02 11:55:42,516 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-02 11:55:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:42,517 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-02 11:55:42,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:55:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-02 11:55:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-02 11:55:42,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:42,517 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-02 11:55:42,518 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:42,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:42,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-10-02 11:55:42,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:42,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:42,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:42,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:42,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:42,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:44,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:44,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:44,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:44,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-02 11:55:44,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:44,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:44,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:44,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-02 11:55:44,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:55:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:55:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:55:44,306 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-02 11:55:44,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:44,439 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-02 11:55:44,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:55:44,439 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-02 11:55:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:44,440 INFO L225 Difference]: With dead ends: 70 [2018-10-02 11:55:44,440 INFO L226 Difference]: Without dead ends: 68 [2018-10-02 11:55:44,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:55:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-02 11:55:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-02 11:55:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-02 11:55:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-02 11:55:44,444 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-02 11:55:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:44,445 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-02 11:55:44,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:55:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-02 11:55:44,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-02 11:55:44,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:44,446 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-02 11:55:44,446 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:44,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:44,447 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-10-02 11:55:44,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:44,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:44,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:44,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:44,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:46,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:46,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:46,353 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:46,392 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:46,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:46,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:46,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:46,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-02 11:55:46,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 11:55:46,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 11:55:46,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:55:46,441 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-02 11:55:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:46,857 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-02 11:55:46,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:55:46,858 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-02 11:55:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:46,858 INFO L225 Difference]: With dead ends: 71 [2018-10-02 11:55:46,859 INFO L226 Difference]: Without dead ends: 69 [2018-10-02 11:55:46,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:55:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-02 11:55:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-02 11:55:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-02 11:55:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-02 11:55:46,862 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-02 11:55:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:46,863 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-02 11:55:46,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 11:55:46,863 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-02 11:55:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-02 11:55:46,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:46,863 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-02 11:55:46,863 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:46,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:46,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-10-02 11:55:46,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:46,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:46,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:46,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:46,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:48,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:48,414 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:48,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:48,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:55:48,476 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-02 11:55:48,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:48,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:48,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:48,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:48,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 11:55:48,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:55:48,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:55:48,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:55:48,524 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-02 11:55:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:48,619 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-02 11:55:48,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:55:48,619 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-02 11:55:48,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:48,620 INFO L225 Difference]: With dead ends: 72 [2018-10-02 11:55:48,620 INFO L226 Difference]: Without dead ends: 70 [2018-10-02 11:55:48,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:55:48,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-02 11:55:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-02 11:55:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 11:55:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-02 11:55:48,624 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-02 11:55:48,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:48,624 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-02 11:55:48,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:55:48,624 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-02 11:55:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-02 11:55:48,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:48,625 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-02 11:55:48,625 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:48,625 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-10-02 11:55:48,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:48,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:48,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:48,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:48,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:50,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:50,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:50,329 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:55:50,438 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-02 11:55:50,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:50,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:50,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:50,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-02 11:55:50,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 11:55:50,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 11:55:50,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:55:50,511 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-02 11:55:51,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:51,674 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-02 11:55:51,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:55:51,674 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-02 11:55:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:51,675 INFO L225 Difference]: With dead ends: 73 [2018-10-02 11:55:51,675 INFO L226 Difference]: Without dead ends: 71 [2018-10-02 11:55:51,676 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:55:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-02 11:55:51,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-02 11:55:51,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-02 11:55:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-02 11:55:51,679 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-02 11:55:51,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:51,679 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-02 11:55:51,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 11:55:51,679 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-02 11:55:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-02 11:55:51,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:51,680 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-02 11:55:51,680 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:51,680 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:51,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-10-02 11:55:51,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:51,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:51,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:51,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:51,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:53,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:53,352 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:53,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:53,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:53,432 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:53,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 11:55:53,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:55:53,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:55:53,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:55:53,433 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-02 11:55:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:53,557 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-02 11:55:53,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:55:53,558 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-02 11:55:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:53,559 INFO L225 Difference]: With dead ends: 74 [2018-10-02 11:55:53,559 INFO L226 Difference]: Without dead ends: 72 [2018-10-02 11:55:53,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:55:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-02 11:55:53,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-02 11:55:53,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-02 11:55:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-02 11:55:53,562 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-02 11:55:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:53,562 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-02 11:55:53,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:55:53,563 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-02 11:55:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-02 11:55:53,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:53,563 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-02 11:55:53,564 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:53,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:53,564 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-10-02 11:55:53,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:53,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:53,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:53,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:55:53,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:55,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:55,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:55,323 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:55:55,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:55:55,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:55,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:55,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:55,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-02 11:55:55,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:55:55,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:55:55,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:55:55,400 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-02 11:55:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:55,492 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-02 11:55:55,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:55:55,493 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-02 11:55:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:55,494 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:55:55,494 INFO L226 Difference]: Without dead ends: 73 [2018-10-02 11:55:55,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:55:55,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-02 11:55:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-02 11:55:55,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-02 11:55:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-02 11:55:55,498 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-02 11:55:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:55,498 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-02 11:55:55,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:55:55,498 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-02 11:55:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-02 11:55:55,498 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:55,498 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-02 11:55:55,499 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:55,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:55,499 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-10-02 11:55:55,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:55,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:55,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:55,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:55,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:57,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:57,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:57,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:55:57,651 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-02 11:55:57,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:57,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:57,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:57,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-02 11:55:57,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:55:57,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:55:57,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:55:57,687 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-02 11:55:57,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:57,871 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-02 11:55:57,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:55:57,872 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-02 11:55:57,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:57,873 INFO L225 Difference]: With dead ends: 76 [2018-10-02 11:55:57,873 INFO L226 Difference]: Without dead ends: 74 [2018-10-02 11:55:57,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:55:57,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-02 11:55:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-02 11:55:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-02 11:55:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-02 11:55:57,876 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-02 11:55:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:57,877 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-02 11:55:57,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:55:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-02 11:55:57,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-02 11:55:57,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:57,877 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-02 11:55:57,878 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:57,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:57,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-10-02 11:55:57,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:57,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:57,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:57,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:57,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:55:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:59,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:55:59,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:55:59,653 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:55:59,711 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:55:59,711 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:55:59,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:55:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:55:59,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:55:59,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-02 11:55:59,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 11:55:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 11:55:59,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:55:59,760 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-02 11:55:59,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:55:59,967 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-02 11:55:59,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:55:59,967 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-02 11:55:59,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:55:59,968 INFO L225 Difference]: With dead ends: 77 [2018-10-02 11:55:59,968 INFO L226 Difference]: Without dead ends: 75 [2018-10-02 11:55:59,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:55:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-02 11:55:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-02 11:55:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-02 11:55:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-02 11:55:59,975 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-02 11:55:59,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:55:59,975 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-02 11:55:59,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 11:55:59,975 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-02 11:55:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-02 11:55:59,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:55:59,976 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-02 11:55:59,976 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:55:59,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:55:59,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-10-02 11:55:59,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:55:59,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:55:59,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:59,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:55:59,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:55:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:02,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:02,230 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 [2018-10-02 11:56:02,238 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:02,297 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-02 11:56:02,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:02,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:02,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:02,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-02 11:56:02,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:56:02,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:56:02,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:56:02,351 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-02 11:56:02,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:02,687 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-02 11:56:02,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:56:02,688 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-02 11:56:02,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:02,688 INFO L225 Difference]: With dead ends: 78 [2018-10-02 11:56:02,689 INFO L226 Difference]: Without dead ends: 76 [2018-10-02 11:56:02,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:56:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-02 11:56:02,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-02 11:56:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-02 11:56:02,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-02 11:56:02,693 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-02 11:56:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:02,694 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-02 11:56:02,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:56:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-02 11:56:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-02 11:56:02,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:02,695 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-02 11:56:02,695 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:02,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:02,695 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-10-02 11:56:02,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:02,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:02,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:02,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:02,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:02,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:04,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:04,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:56:04,692 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:04,790 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-02 11:56:04,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:04,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:04,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:04,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-02 11:56:04,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 11:56:04,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 11:56:04,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:56:04,839 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-02 11:56:04,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:04,964 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-02 11:56:04,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:56:04,964 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-02 11:56:04,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:04,965 INFO L225 Difference]: With dead ends: 79 [2018-10-02 11:56:04,966 INFO L226 Difference]: Without dead ends: 77 [2018-10-02 11:56:04,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:56:04,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-02 11:56:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-02 11:56:04,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 11:56:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-02 11:56:04,969 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-02 11:56:04,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:04,969 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-02 11:56:04,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 11:56:04,970 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-02 11:56:04,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 11:56:04,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:04,970 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-02 11:56:04,971 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:04,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:04,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-10-02 11:56:04,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:04,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:04,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:04,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:04,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:07,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:07,550 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 [2018-10-02 11:56:07,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:07,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:07,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:07,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-02 11:56:07,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:56:07,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:56:07,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:56:07,670 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-02 11:56:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:07,778 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-02 11:56:07,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 11:56:07,778 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-02 11:56:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:07,779 INFO L225 Difference]: With dead ends: 80 [2018-10-02 11:56:07,779 INFO L226 Difference]: Without dead ends: 78 [2018-10-02 11:56:07,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:56:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-02 11:56:07,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-02 11:56:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-02 11:56:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-02 11:56:07,783 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-02 11:56:07,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:07,783 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-02 11:56:07,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:56:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-02 11:56:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-02 11:56:07,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:07,784 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-02 11:56:07,784 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:07,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-10-02 11:56:07,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:07,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:07,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:07,785 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:07,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:09,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:09,833 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 [2018-10-02 11:56:09,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:09,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:09,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:09,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:09,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:09,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-02 11:56:09,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 11:56:09,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 11:56:09,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:56:09,919 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-02 11:56:10,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:10,059 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-02 11:56:10,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:56:10,060 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-02 11:56:10,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:10,061 INFO L225 Difference]: With dead ends: 81 [2018-10-02 11:56:10,061 INFO L226 Difference]: Without dead ends: 79 [2018-10-02 11:56:10,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:56:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-02 11:56:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-02 11:56:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-02 11:56:10,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-02 11:56:10,065 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-02 11:56:10,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:10,065 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-02 11:56:10,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 11:56:10,065 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-02 11:56:10,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-02 11:56:10,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:10,066 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-02 11:56:10,066 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:10,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:10,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-10-02 11:56:10,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:10,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:10,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:10,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:10,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:12,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:12,315 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:56:12,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:12,385 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-02 11:56:12,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:12,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:12,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:12,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-02 11:56:12,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:56:12,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:56:12,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:56:12,424 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-02 11:56:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:12,573 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-02 11:56:12,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 11:56:12,574 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-02 11:56:12,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:12,575 INFO L225 Difference]: With dead ends: 82 [2018-10-02 11:56:12,575 INFO L226 Difference]: Without dead ends: 80 [2018-10-02 11:56:12,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:56:12,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-02 11:56:12,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-02 11:56:12,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-02 11:56:12,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-02 11:56:12,578 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-02 11:56:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:12,579 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-02 11:56:12,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:56:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-02 11:56:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-02 11:56:12,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:12,579 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-02 11:56:12,579 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:12,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:12,580 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-10-02 11:56:12,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:12,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:12,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:12,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:12,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:12,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:14,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:14,743 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 [2018-10-02 11:56:14,750 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:14,791 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:14,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:14,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:14,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:14,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-02 11:56:14,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-02 11:56:14,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-02 11:56:14,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:56:14,829 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-02 11:56:16,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:16,194 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-02 11:56:16,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 11:56:16,195 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-02 11:56:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:16,195 INFO L225 Difference]: With dead ends: 83 [2018-10-02 11:56:16,195 INFO L226 Difference]: Without dead ends: 81 [2018-10-02 11:56:16,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:56:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-02 11:56:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-02 11:56:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-02 11:56:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-02 11:56:16,199 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-02 11:56:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:16,199 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-02 11:56:16,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-02 11:56:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-02 11:56:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-02 11:56:16,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:16,200 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-02 11:56:16,200 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:16,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:16,200 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-10-02 11:56:16,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:16,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:16,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:16,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:16,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:18,834 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:18,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:56:18,847 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:18,914 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-02 11:56:18,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:18,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:18,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:18,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-02 11:56:18,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-02 11:56:18,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-02 11:56:18,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:56:18,975 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-02 11:56:19,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:19,232 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-02 11:56:19,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-02 11:56:19,233 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-02 11:56:19,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:19,234 INFO L225 Difference]: With dead ends: 84 [2018-10-02 11:56:19,234 INFO L226 Difference]: Without dead ends: 82 [2018-10-02 11:56:19,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-02 11:56:19,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-02 11:56:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-02 11:56:19,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-02 11:56:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-02 11:56:19,237 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-02 11:56:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:19,239 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-02 11:56:19,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-02 11:56:19,239 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-02 11:56:19,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-02 11:56:19,240 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:19,240 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-02 11:56:19,240 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:19,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:19,240 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-10-02 11:56:19,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:19,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:19,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:19,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:19,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:21,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:21,673 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 [2018-10-02 11:56:21,680 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:21,748 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-02 11:56:21,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:21,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:21,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:21,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-02 11:56:21,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-02 11:56:21,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-02 11:56:21,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:56:21,807 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-02 11:56:22,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:22,114 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-02 11:56:22,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-02 11:56:22,115 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-02 11:56:22,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:22,115 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:56:22,116 INFO L226 Difference]: Without dead ends: 83 [2018-10-02 11:56:22,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-02 11:56:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-02 11:56:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-02 11:56:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-02 11:56:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-02 11:56:22,120 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-02 11:56:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:22,120 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-02 11:56:22,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-02 11:56:22,121 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-02 11:56:22,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-02 11:56:22,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:22,121 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-02 11:56:22,121 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:22,122 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:22,122 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-10-02 11:56:22,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:22,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:22,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:22,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:22,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:24,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:24,416 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 [2018-10-02 11:56:24,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:24,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:24,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:24,522 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-02 11:56:24,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-02 11:56:24,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-02 11:56:24,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:56:24,524 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-02 11:56:24,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:24,695 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-02 11:56:24,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-02 11:56:24,695 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-02 11:56:24,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:24,696 INFO L225 Difference]: With dead ends: 86 [2018-10-02 11:56:24,696 INFO L226 Difference]: Without dead ends: 84 [2018-10-02 11:56:24,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-02 11:56:24,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-02 11:56:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-02 11:56:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-02 11:56:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-02 11:56:24,700 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-02 11:56:24,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:24,700 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-02 11:56:24,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-02 11:56:24,700 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-02 11:56:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-02 11:56:24,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:24,700 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-02 11:56:24,700 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:24,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:24,701 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-10-02 11:56:24,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:24,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:24,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:24,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:24,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:27,398 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:27,398 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 [2018-10-02 11:56:27,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:27,453 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:27,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:27,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:27,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:27,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:27,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-02 11:56:27,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-02 11:56:27,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-02 11:56:27,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:56:27,494 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-02 11:56:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:27,671 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-02 11:56:27,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-02 11:56:27,671 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-02 11:56:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:27,672 INFO L225 Difference]: With dead ends: 87 [2018-10-02 11:56:27,672 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 11:56:27,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-02 11:56:27,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 11:56:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 11:56:27,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 11:56:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-02 11:56:27,676 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-02 11:56:27,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:27,676 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-02 11:56:27,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-02 11:56:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-02 11:56:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 11:56:27,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:27,677 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-02 11:56:27,677 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:27,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:27,678 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-10-02 11:56:27,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:27,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:27,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:27,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:27,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:30,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:30,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:56:30,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:30,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-02 11:56:30,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:30,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:30,228 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:30,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-02 11:56:30,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-02 11:56:30,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-02 11:56:30,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:56:30,229 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-02 11:56:30,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:30,343 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-02 11:56:30,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-02 11:56:30,343 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-02 11:56:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:30,344 INFO L225 Difference]: With dead ends: 88 [2018-10-02 11:56:30,344 INFO L226 Difference]: Without dead ends: 86 [2018-10-02 11:56:30,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-02 11:56:30,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-02 11:56:30,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-02 11:56:30,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-02 11:56:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-02 11:56:30,348 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-02 11:56:30,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:30,348 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-02 11:56:30,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-02 11:56:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-02 11:56:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-02 11:56:30,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:30,348 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-02 11:56:30,349 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:30,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:30,349 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-10-02 11:56:30,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:30,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:30,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:30,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:30,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:33,409 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:33,409 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 [2018-10-02 11:56:33,419 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:33,470 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:33,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:33,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:33,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:33,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:33,529 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-02 11:56:33,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-02 11:56:33,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-02 11:56:33,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:56:33,531 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-02 11:56:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:33,907 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-02 11:56:33,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-02 11:56:33,908 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-02 11:56:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:33,908 INFO L225 Difference]: With dead ends: 89 [2018-10-02 11:56:33,909 INFO L226 Difference]: Without dead ends: 87 [2018-10-02 11:56:33,909 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-02 11:56:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-02 11:56:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-02 11:56:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-02 11:56:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-02 11:56:33,912 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-02 11:56:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:33,912 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-02 11:56:33,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-02 11:56:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-02 11:56:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-02 11:56:33,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:33,913 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-02 11:56:33,913 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:33,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:33,913 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-10-02 11:56:33,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:33,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:33,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:33,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:33,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:33,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:36,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:36,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:56:36,396 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:36,476 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-02 11:56:36,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:36,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:36,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:36,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-02 11:56:36,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-02 11:56:36,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-02 11:56:36,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:56:36,533 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-02 11:56:36,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:36,792 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-02 11:56:36,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-02 11:56:36,793 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-02 11:56:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:36,794 INFO L225 Difference]: With dead ends: 90 [2018-10-02 11:56:36,794 INFO L226 Difference]: Without dead ends: 88 [2018-10-02 11:56:36,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-02 11:56:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-02 11:56:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-02 11:56:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-02 11:56:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-02 11:56:36,797 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-02 11:56:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:36,798 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-02 11:56:36,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-02 11:56:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-02 11:56:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-02 11:56:36,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:36,799 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-02 11:56:36,799 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:36,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:36,799 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-10-02 11:56:36,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:36,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:36,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:36,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:36,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:39,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:39,705 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 [2018-10-02 11:56:39,712 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:56:39,785 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-02 11:56:39,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:39,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:39,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:39,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-02 11:56:39,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-02 11:56:39,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-02 11:56:39,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:56:39,847 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-02 11:56:41,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:41,036 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-02 11:56:41,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-02 11:56:41,036 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-02 11:56:41,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:41,037 INFO L225 Difference]: With dead ends: 91 [2018-10-02 11:56:41,037 INFO L226 Difference]: Without dead ends: 89 [2018-10-02 11:56:41,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-02 11:56:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-02 11:56:41,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-02 11:56:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-02 11:56:41,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-02 11:56:41,040 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-02 11:56:41,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:41,043 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-02 11:56:41,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-02 11:56:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-02 11:56:41,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-02 11:56:41,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:41,044 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-02 11:56:41,044 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:41,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:41,046 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-10-02 11:56:41,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:41,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:41,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:41,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:41,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:44,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:44,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:56:44,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:44,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:44,117 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:44,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-02 11:56:44,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-02 11:56:44,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-02 11:56:44,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:56:44,119 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-02 11:56:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:44,275 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-02 11:56:44,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-02 11:56:44,275 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-02 11:56:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:44,276 INFO L225 Difference]: With dead ends: 92 [2018-10-02 11:56:44,276 INFO L226 Difference]: Without dead ends: 90 [2018-10-02 11:56:44,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-02 11:56:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-02 11:56:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-02 11:56:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-02 11:56:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-02 11:56:44,280 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-02 11:56:44,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:44,281 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-02 11:56:44,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-02 11:56:44,281 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-02 11:56:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-02 11:56:44,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:44,282 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-02 11:56:44,282 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:44,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:44,282 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-10-02 11:56:44,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:44,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:44,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:44,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:56:44,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:47,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:47,072 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 [2018-10-02 11:56:47,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:56:47,126 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:56:47,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:47,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:47,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:47,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-02 11:56:47,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-02 11:56:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-02 11:56:47,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:56:47,166 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-02 11:56:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:47,386 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-02 11:56:47,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-02 11:56:47,386 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-02 11:56:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:47,387 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:56:47,387 INFO L226 Difference]: Without dead ends: 91 [2018-10-02 11:56:47,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:56:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-02 11:56:47,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-02 11:56:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-02 11:56:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-02 11:56:47,389 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-02 11:56:47,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:47,389 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-02 11:56:47,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-02 11:56:47,389 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-02 11:56:47,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-02 11:56:47,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:47,390 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-02 11:56:47,390 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:47,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:47,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-10-02 11:56:47,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:47,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:47,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:47,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:47,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:50,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:50,264 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 [2018-10-02 11:56:50,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:56:50,355 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-02 11:56:50,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:50,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:50,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:50,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-02 11:56:50,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-02 11:56:50,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-02 11:56:50,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:56:50,397 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-02 11:56:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:50,572 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-02 11:56:50,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-02 11:56:50,573 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-02 11:56:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:50,574 INFO L225 Difference]: With dead ends: 94 [2018-10-02 11:56:50,574 INFO L226 Difference]: Without dead ends: 92 [2018-10-02 11:56:50,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-02 11:56:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-02 11:56:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-02 11:56:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-02 11:56:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-02 11:56:50,577 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-02 11:56:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:50,578 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-02 11:56:50,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-02 11:56:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-02 11:56:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-02 11:56:50,578 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:50,578 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-02 11:56:50,578 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:50,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:50,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-10-02 11:56:50,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:50,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:50,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:50,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:50,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:53,717 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:53,717 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 [2018-10-02 11:56:53,724 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:56:53,774 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:56:53,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:53,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:53,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:53,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-02 11:56:53,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-02 11:56:53,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-02 11:56:53,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:56:53,816 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-02 11:56:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:53,937 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-02 11:56:53,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-02 11:56:53,938 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-02 11:56:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:53,939 INFO L225 Difference]: With dead ends: 95 [2018-10-02 11:56:53,939 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 11:56:53,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-02 11:56:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 11:56:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 11:56:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 11:56:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-02 11:56:53,942 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-02 11:56:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:53,942 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-02 11:56:53,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-02 11:56:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-02 11:56:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:56:53,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:53,943 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-02 11:56:53,943 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:53,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:53,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-10-02 11:56:53,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:53,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:53,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:53,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:53,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:56:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:56,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:56:56,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:56:56,798 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:56:56,930 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-02 11:56:56,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:56:56,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:56:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:56:56,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:56:56,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-02 11:56:56,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-02 11:56:56,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-02 11:56:56,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:56:56,990 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-02 11:56:57,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:56:57,238 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-02 11:56:57,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-02 11:56:57,239 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-02 11:56:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:56:57,240 INFO L225 Difference]: With dead ends: 96 [2018-10-02 11:56:57,240 INFO L226 Difference]: Without dead ends: 94 [2018-10-02 11:56:57,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-02 11:56:57,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-02 11:56:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-02 11:56:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-02 11:56:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-02 11:56:57,243 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-02 11:56:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:56:57,243 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-02 11:56:57,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-02 11:56:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-02 11:56:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-02 11:56:57,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:56:57,244 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-02 11:56:57,244 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:56:57,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:56:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-10-02 11:56:57,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:56:57,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:56:57,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:57,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:56:57,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:56:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:00,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:57:00,499 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:00,581 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-02 11:57:00,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:00,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:00,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:00,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-02 11:57:00,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-02 11:57:00,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-02 11:57:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-02 11:57:00,632 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-02 11:57:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:00,842 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-02 11:57:00,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-02 11:57:00,842 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-02 11:57:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:00,843 INFO L225 Difference]: With dead ends: 97 [2018-10-02 11:57:00,844 INFO L226 Difference]: Without dead ends: 95 [2018-10-02 11:57:00,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-02 11:57:00,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-02 11:57:00,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-02 11:57:00,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-02 11:57:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-02 11:57:00,848 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-02 11:57:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:00,848 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-02 11:57:00,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-02 11:57:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-02 11:57:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-02 11:57:00,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:00,849 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-02 11:57:00,849 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:00,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:00,850 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-10-02 11:57:00,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:00,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:00,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:00,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:00,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:04,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:04,008 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 [2018-10-02 11:57:04,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:04,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:04,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:04,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:04,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-02 11:57:04,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-02 11:57:04,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-02 11:57:04,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:57:04,111 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-02 11:57:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:04,284 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-02 11:57:04,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-02 11:57:04,284 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-02 11:57:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:04,285 INFO L225 Difference]: With dead ends: 98 [2018-10-02 11:57:04,285 INFO L226 Difference]: Without dead ends: 96 [2018-10-02 11:57:04,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-02 11:57:04,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-02 11:57:04,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-02 11:57:04,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-02 11:57:04,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-02 11:57:04,289 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-02 11:57:04,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:04,289 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-02 11:57:04,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-02 11:57:04,289 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-02 11:57:04,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-02 11:57:04,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:04,290 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-02 11:57:04,290 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:04,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:04,290 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-10-02 11:57:04,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:04,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:04,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:04,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:04,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:07,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:07,372 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:07,372 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 [2018-10-02 11:57:07,379 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:07,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:07,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:07,434 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:07,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:07,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-02 11:57:07,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-02 11:57:07,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-02 11:57:07,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:57:07,483 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-02 11:57:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:07,647 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-02 11:57:07,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-02 11:57:07,647 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-02 11:57:07,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:07,648 INFO L225 Difference]: With dead ends: 99 [2018-10-02 11:57:07,648 INFO L226 Difference]: Without dead ends: 97 [2018-10-02 11:57:07,649 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-02 11:57:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-02 11:57:07,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-02 11:57:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-02 11:57:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-02 11:57:07,651 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-02 11:57:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:07,652 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-02 11:57:07,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-02 11:57:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-02 11:57:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-02 11:57:07,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:07,652 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-02 11:57:07,652 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:07,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-10-02 11:57:07,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:07,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:07,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:07,654 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:07,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:11,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:11,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:57:11,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:11,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-02 11:57:11,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:11,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:11,890 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:11,890 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-02 11:57:11,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-02 11:57:11,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-02 11:57:11,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:57:11,892 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-02 11:57:12,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:12,077 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-02 11:57:12,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-02 11:57:12,077 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-02 11:57:12,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:12,078 INFO L225 Difference]: With dead ends: 100 [2018-10-02 11:57:12,078 INFO L226 Difference]: Without dead ends: 98 [2018-10-02 11:57:12,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-02 11:57:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-02 11:57:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-02 11:57:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-02 11:57:12,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-02 11:57:12,082 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-02 11:57:12,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:12,082 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-02 11:57:12,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-02 11:57:12,082 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-02 11:57:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-02 11:57:12,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:12,083 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-02 11:57:12,083 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:12,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:12,083 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-10-02 11:57:12,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:12,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:12,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:12,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:12,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:15,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:15,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:57:15,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:15,541 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:15,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:15,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:15,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:15,599 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-02 11:57:15,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-02 11:57:15,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-02 11:57:15,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:57:15,601 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-02 11:57:15,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:15,761 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-02 11:57:15,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-02 11:57:15,761 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-02 11:57:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:15,762 INFO L225 Difference]: With dead ends: 101 [2018-10-02 11:57:15,762 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:57:15,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-02 11:57:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:57:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-02 11:57:15,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-02 11:57:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-02 11:57:15,766 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-02 11:57:15,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:15,767 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-02 11:57:15,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-02 11:57:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-02 11:57:15,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-02 11:57:15,767 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:15,768 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-02 11:57:15,768 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:15,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:15,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-10-02 11:57:15,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:15,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:15,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:15,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:15,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:15,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:19,211 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:19,211 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 [2018-10-02 11:57:19,221 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:19,309 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-02 11:57:19,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:19,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:19,349 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:19,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-02 11:57:19,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-02 11:57:19,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-02 11:57:19,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:57:19,351 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-02 11:57:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:19,515 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-02 11:57:19,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-02 11:57:19,515 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-02 11:57:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:19,516 INFO L225 Difference]: With dead ends: 102 [2018-10-02 11:57:19,516 INFO L226 Difference]: Without dead ends: 100 [2018-10-02 11:57:19,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-02 11:57:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-02 11:57:19,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-02 11:57:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-02 11:57:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-02 11:57:19,520 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-02 11:57:19,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:19,520 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-02 11:57:19,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-02 11:57:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-02 11:57:19,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-02 11:57:19,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:19,521 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-02 11:57:19,521 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:19,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-10-02 11:57:19,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:19,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:19,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:19,522 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:19,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:22,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:22,759 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 [2018-10-02 11:57:22,766 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:22,856 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-02 11:57:22,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:22,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:22,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:22,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-02 11:57:22,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-02 11:57:22,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-02 11:57:22,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-02 11:57:22,901 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-02 11:57:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:23,159 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-02 11:57:23,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-02 11:57:23,159 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-02 11:57:23,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:23,160 INFO L225 Difference]: With dead ends: 103 [2018-10-02 11:57:23,160 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 11:57:23,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-02 11:57:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 11:57:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 11:57:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 11:57:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-02 11:57:23,163 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-02 11:57:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:23,164 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-02 11:57:23,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-02 11:57:23,164 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-02 11:57:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 11:57:23,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:23,164 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-02 11:57:23,165 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:23,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:23,165 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-10-02 11:57:23,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:23,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:23,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:23,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:23,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:26,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:26,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:57:26,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:26,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:26,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:26,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-02 11:57:26,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-02 11:57:26,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-02 11:57:26,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:57:26,790 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-02 11:57:27,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:27,037 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-02 11:57:27,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-02 11:57:27,037 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-02 11:57:27,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:27,038 INFO L225 Difference]: With dead ends: 104 [2018-10-02 11:57:27,039 INFO L226 Difference]: Without dead ends: 102 [2018-10-02 11:57:27,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-02 11:57:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-02 11:57:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-02 11:57:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-02 11:57:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-02 11:57:27,042 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-02 11:57:27,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:27,042 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-02 11:57:27,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-02 11:57:27,042 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-02 11:57:27,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-02 11:57:27,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:27,043 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-02 11:57:27,043 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:27,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:27,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-10-02 11:57:27,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:27,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:27,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:27,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:27,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:27,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:30,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:30,797 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 [2018-10-02 11:57:30,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:30,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:30,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:30,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:30,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:30,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-02 11:57:30,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-02 11:57:30,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-02 11:57:30,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-02 11:57:30,911 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-02 11:57:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:31,138 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-02 11:57:31,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-02 11:57:31,139 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-02 11:57:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:31,140 INFO L225 Difference]: With dead ends: 105 [2018-10-02 11:57:31,140 INFO L226 Difference]: Without dead ends: 103 [2018-10-02 11:57:31,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-02 11:57:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-02 11:57:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-02 11:57:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-02 11:57:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-02 11:57:31,144 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-02 11:57:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:31,144 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-02 11:57:31,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-02 11:57:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-02 11:57:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-02 11:57:31,145 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:31,145 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-02 11:57:31,145 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:31,145 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:31,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-10-02 11:57:31,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:31,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:31,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:31,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:31,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:34,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:34,858 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 [2018-10-02 11:57:34,864 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:57:34,964 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-02 11:57:34,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:34,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:35,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:35,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-02 11:57:35,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-02 11:57:35,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-02 11:57:35,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:57:35,007 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-02 11:57:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:35,203 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-02 11:57:35,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-02 11:57:35,204 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-02 11:57:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:35,205 INFO L225 Difference]: With dead ends: 106 [2018-10-02 11:57:35,205 INFO L226 Difference]: Without dead ends: 104 [2018-10-02 11:57:35,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-02 11:57:35,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-02 11:57:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-02 11:57:35,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-02 11:57:35,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-02 11:57:35,208 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-02 11:57:35,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:35,208 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-02 11:57:35,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-02 11:57:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-02 11:57:35,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-02 11:57:35,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:35,209 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-02 11:57:35,210 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:35,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:35,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-10-02 11:57:35,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:35,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:35,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:35,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:35,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:39,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:39,036 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 [2018-10-02 11:57:39,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:57:39,102 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:57:39,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:39,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:39,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:39,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-02 11:57:39,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-02 11:57:39,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-02 11:57:39,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-02 11:57:39,148 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-02 11:57:39,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:39,397 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-02 11:57:39,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-02 11:57:39,398 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-02 11:57:39,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:39,399 INFO L225 Difference]: With dead ends: 107 [2018-10-02 11:57:39,399 INFO L226 Difference]: Without dead ends: 105 [2018-10-02 11:57:39,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-02 11:57:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-02 11:57:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-02 11:57:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-02 11:57:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-02 11:57:39,403 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-02 11:57:39,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:39,403 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-02 11:57:39,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-02 11:57:39,404 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-02 11:57:39,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-02 11:57:39,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:39,404 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-02 11:57:39,405 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:39,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-10-02 11:57:39,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:39,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:39,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:39,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:39,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:43,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:43,059 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 [2018-10-02 11:57:43,066 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:57:43,173 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-02 11:57:43,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:43,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:43,215 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:43,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-02 11:57:43,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-02 11:57:43,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-02 11:57:43,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:57:43,217 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-02 11:57:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:43,370 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-02 11:57:43,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-02 11:57:43,371 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-02 11:57:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:43,372 INFO L225 Difference]: With dead ends: 108 [2018-10-02 11:57:43,372 INFO L226 Difference]: Without dead ends: 106 [2018-10-02 11:57:43,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-02 11:57:43,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-02 11:57:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-02 11:57:43,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-02 11:57:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-02 11:57:43,376 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-02 11:57:43,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:43,377 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-02 11:57:43,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-02 11:57:43,377 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-02 11:57:43,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-02 11:57:43,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:43,378 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-02 11:57:43,378 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:43,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:43,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-10-02 11:57:43,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:43,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:43,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:43,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:43,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:47,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:47,473 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 [2018-10-02 11:57:47,480 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:57:47,578 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-02 11:57:47,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:47,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:47,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:47,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-02 11:57:47,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-02 11:57:47,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-02 11:57:47,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-02 11:57:47,635 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-02 11:57:47,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:47,898 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-02 11:57:47,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-02 11:57:47,899 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-02 11:57:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:47,900 INFO L225 Difference]: With dead ends: 109 [2018-10-02 11:57:47,900 INFO L226 Difference]: Without dead ends: 107 [2018-10-02 11:57:47,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-02 11:57:47,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-02 11:57:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-02 11:57:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-02 11:57:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-02 11:57:47,904 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-02 11:57:47,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:47,904 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-02 11:57:47,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-02 11:57:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-02 11:57:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-02 11:57:47,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:47,905 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-02 11:57:47,905 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:47,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:47,906 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-10-02 11:57:47,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:47,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:47,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:47,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:47,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:52,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:52,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:57:52,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:52,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:52,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:52,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-02 11:57:52,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-02 11:57:52,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-02 11:57:52,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:57:52,196 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-02 11:57:52,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:52,447 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-02 11:57:52,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-02 11:57:52,447 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-02 11:57:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:52,448 INFO L225 Difference]: With dead ends: 110 [2018-10-02 11:57:52,448 INFO L226 Difference]: Without dead ends: 108 [2018-10-02 11:57:52,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-02 11:57:52,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-02 11:57:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-02 11:57:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-02 11:57:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-02 11:57:52,452 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-02 11:57:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:52,452 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-02 11:57:52,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-02 11:57:52,452 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-02 11:57:52,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-02 11:57:52,452 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:52,453 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-02 11:57:52,453 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:52,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:52,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-10-02 11:57:52,453 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:52,453 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:52,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:52,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:57:52,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:57:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:56,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:57:56,668 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 [2018-10-02 11:57:56,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:57:56,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:57:56,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:57:56,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:57:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:57:56,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:57:56,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-02 11:57:56,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-02 11:57:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-02 11:57:56,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-02 11:57:56,787 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-02 11:57:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:57:57,093 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-02 11:57:57,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-02 11:57:57,093 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-02 11:57:57,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:57:57,094 INFO L225 Difference]: With dead ends: 111 [2018-10-02 11:57:57,094 INFO L226 Difference]: Without dead ends: 109 [2018-10-02 11:57:57,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-02 11:57:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-02 11:57:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-02 11:57:57,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-02 11:57:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-02 11:57:57,097 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-02 11:57:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:57:57,097 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-02 11:57:57,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-02 11:57:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-02 11:57:57,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-02 11:57:57,098 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:57:57,099 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-02 11:57:57,099 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:57:57,099 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:57:57,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-10-02 11:57:57,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:57:57,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:57:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:57,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:57:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:57:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:01,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:01,314 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 [2018-10-02 11:58:01,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:58:01,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-02 11:58:01,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:01,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:01,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:01,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:01,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-02 11:58:01,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-02 11:58:01,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-02 11:58:01,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:58:01,474 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-10-02 11:58:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:01,734 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-02 11:58:01,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-02 11:58:01,735 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-10-02 11:58:01,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:01,736 INFO L225 Difference]: With dead ends: 112 [2018-10-02 11:58:01,736 INFO L226 Difference]: Without dead ends: 110 [2018-10-02 11:58:01,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-02 11:58:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-02 11:58:01,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-02 11:58:01,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-02 11:58:01,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-02 11:58:01,739 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-02 11:58:01,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:01,739 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-02 11:58:01,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-02 11:58:01,739 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-02 11:58:01,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-02 11:58:01,740 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:01,740 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-02 11:58:01,740 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:01,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:01,741 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-10-02 11:58:01,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:01,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:01,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:01,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:01,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:05,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:05,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:58:05,945 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:58:06,012 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:58:06,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:06,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:06,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:06,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-02 11:58:06,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-02 11:58:06,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-02 11:58:06,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-02 11:58:06,056 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-10-02 11:58:06,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:06,295 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-02 11:58:06,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-02 11:58:06,295 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-10-02 11:58:06,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:06,296 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:58:06,296 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 11:58:06,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-02 11:58:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 11:58:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-02 11:58:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-02 11:58:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-02 11:58:06,299 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-02 11:58:06,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:06,300 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-02 11:58:06,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-02 11:58:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-02 11:58:06,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-02 11:58:06,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:06,300 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-02 11:58:06,300 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:06,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:06,301 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-10-02 11:58:06,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:06,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:06,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:06,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:06,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:10,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:10,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:10,616 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 [2018-10-02 11:58:10,624 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:58:10,728 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-02 11:58:10,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:10,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:10,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:10,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-02 11:58:10,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-02 11:58:10,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-02 11:58:10,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:58:10,773 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-10-02 11:58:10,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:10,948 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-02 11:58:10,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-02 11:58:10,949 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-02 11:58:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:10,949 INFO L225 Difference]: With dead ends: 114 [2018-10-02 11:58:10,950 INFO L226 Difference]: Without dead ends: 112 [2018-10-02 11:58:10,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-02 11:58:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-02 11:58:10,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-02 11:58:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 11:58:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-02 11:58:10,953 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-10-02 11:58:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:10,954 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-02 11:58:10,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-02 11:58:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-02 11:58:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-02 11:58:10,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:10,955 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-10-02 11:58:10,955 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:10,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:10,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-10-02 11:58:10,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:10,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:10,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:10,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:10,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:15,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:15,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:58:15,534 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:58:15,637 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-02 11:58:15,637 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:15,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:15,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:15,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-02 11:58:15,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-02 11:58:15,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-02 11:58:15,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-02 11:58:15,686 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-10-02 11:58:15,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:15,968 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-02 11:58:15,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-02 11:58:15,969 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-10-02 11:58:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:15,970 INFO L225 Difference]: With dead ends: 115 [2018-10-02 11:58:15,970 INFO L226 Difference]: Without dead ends: 113 [2018-10-02 11:58:15,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-02 11:58:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-02 11:58:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-02 11:58:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-02 11:58:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-02 11:58:15,973 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-10-02 11:58:15,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:15,974 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-02 11:58:15,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-02 11:58:15,974 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-02 11:58:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-02 11:58:15,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:15,975 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-10-02 11:58:15,975 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:15,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:15,975 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-10-02 11:58:15,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:15,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:15,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:15,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:15,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:20,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:20,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:58:20,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:20,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:20,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:20,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-10-02 11:58:20,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-02 11:58:20,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-02 11:58:20,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:58:20,705 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-10-02 11:58:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:20,919 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-10-02 11:58:20,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-02 11:58:20,920 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-10-02 11:58:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:20,920 INFO L225 Difference]: With dead ends: 116 [2018-10-02 11:58:20,920 INFO L226 Difference]: Without dead ends: 114 [2018-10-02 11:58:20,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-02 11:58:20,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-02 11:58:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-02 11:58:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-02 11:58:20,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-02 11:58:20,924 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-10-02 11:58:20,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:20,924 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-02 11:58:20,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-02 11:58:20,924 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-02 11:58:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-02 11:58:20,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:20,925 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-10-02 11:58:20,925 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:20,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:20,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-10-02 11:58:20,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:20,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:20,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:20,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:58:20,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:25,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:25,396 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 [2018-10-02 11:58:25,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:58:25,465 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:58:25,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:25,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:25,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:25,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-10-02 11:58:25,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-02 11:58:25,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-02 11:58:25,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-02 11:58:25,510 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-10-02 11:58:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:25,832 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-02 11:58:25,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-02 11:58:25,833 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-10-02 11:58:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:25,833 INFO L225 Difference]: With dead ends: 117 [2018-10-02 11:58:25,833 INFO L226 Difference]: Without dead ends: 115 [2018-10-02 11:58:25,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-10-02 11:58:25,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-02 11:58:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-02 11:58:25,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-02 11:58:25,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-02 11:58:25,837 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-10-02 11:58:25,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:25,837 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-02 11:58:25,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-02 11:58:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-02 11:58:25,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-02 11:58:25,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:25,838 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-10-02 11:58:25,838 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:25,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:25,839 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-10-02 11:58:25,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:25,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:25,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:25,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:25,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:30,387 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:30,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-02 11:58:30,394 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:58:30,547 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-10-02 11:58:30,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:30,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:30,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:30,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-10-02 11:58:30,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-02 11:58:30,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-02 11:58:30,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:58:30,592 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-10-02 11:58:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:30,792 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-10-02 11:58:30,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-02 11:58:30,792 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-10-02 11:58:30,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:30,793 INFO L225 Difference]: With dead ends: 118 [2018-10-02 11:58:30,793 INFO L226 Difference]: Without dead ends: 116 [2018-10-02 11:58:30,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-10-02 11:58:30,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-02 11:58:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-02 11:58:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-02 11:58:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-10-02 11:58:30,797 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-10-02 11:58:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:30,797 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-10-02 11:58:30,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-02 11:58:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-10-02 11:58:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-10-02 11:58:30,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:30,798 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-10-02 11:58:30,798 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:30,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash -467222688, now seen corresponding path program 112 times [2018-10-02 11:58:30,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:30,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:30,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:30,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:30,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:58:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:35,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:58:35,536 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 [2018-10-02 11:58:35,543 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:58:35,608 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:58:35,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:58:35,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:58:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:58:35,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:58:35,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-10-02 11:58:35,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-10-02 11:58:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-10-02 11:58:35,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-10-02 11:58:35,668 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-10-02 11:58:35,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:58:35,980 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-02 11:58:35,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-10-02 11:58:35,981 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-10-02 11:58:35,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:58:35,981 INFO L225 Difference]: With dead ends: 119 [2018-10-02 11:58:35,982 INFO L226 Difference]: Without dead ends: 117 [2018-10-02 11:58:35,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-10-02 11:58:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-02 11:58:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-02 11:58:35,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-02 11:58:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-02 11:58:35,985 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-10-02 11:58:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:58:35,985 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-02 11:58:35,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-10-02 11:58:35,985 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-02 11:58:35,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-02 11:58:35,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:58:35,985 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-10-02 11:58:35,986 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:58:35,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:58:35,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1599005306, now seen corresponding path program 113 times [2018-10-02 11:58:35,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:58:35,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:58:35,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:35,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:58:35,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:58:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-02 11:58:36,950 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:58:36,953 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:58:36,954 INFO L202 PluginConnector]: Adding new model Octopussy.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:58:36 BoogieIcfgContainer [2018-10-02 11:58:36,954 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:58:36,955 INFO L168 Benchmark]: Toolchain (without parser) took 235484.08 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -172.0 MB). Free memory was 1.4 GB in the beginning and 853.2 MB in the end (delta: 591.5 MB). Peak memory consumption was 419.5 MB. Max. memory is 7.1 GB. [2018-10-02 11:58:36,956 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:58:36,956 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:58:36,957 INFO L168 Benchmark]: Boogie Preprocessor took 20.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:58:36,957 INFO L168 Benchmark]: RCFGBuilder took 297.14 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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. [2018-10-02 11:58:36,957 INFO L168 Benchmark]: TraceAbstraction took 235119.54 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -172.0 MB). Free memory was 1.4 GB in the beginning and 853.2 MB in the end (delta: 570.4 MB). Peak memory consumption was 398.4 MB. Max. memory is 7.1 GB. [2018-10-02 11:58:36,959 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 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 297.14 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 235119.54 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -172.0 MB). Free memory was 1.4 GB in the beginning and 853.2 MB in the end (delta: 570.4 MB). Peak memory consumption was 398.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 26]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 26). Cancelled while BasicCegarLoop was analyzing trace of length 117 with TraceHistMax 113, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 49 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 235.0s OverallTime, 114 OverallIterations, 113 TraceHistogramMax, 20.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 341 SDtfs, 2 SDslu, 4849 SDs, 0 SdLazy, 11403 SolverSat, 166 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13106 GetRequests, 6665 SyntacticMatches, 0 SemanticMatches, 6441 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 197.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 113 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 6.1s SatisfiabilityAnalysisTime, 201.2s InterpolantComputationTime, 13331 NumberOfCodeBlocks, 13331 NumberOfCodeBlocksAsserted, 1840 NumberOfCheckSat, 13106 ConstructedInterpolants, 0 QuantifiedInterpolants, 2975960 SizeOfPredicates, 112 NumberOfNonLiveVariables, 26320 ConjunctsInSsa, 6552 ConjunctsInUnsatCore, 225 InterpolantComputations, 1 PerfectInterpolantSequences, 0/480928 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/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-58-36-967.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Octopussy.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-58-36-967.csv Completed graceful shutdown