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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 09:16:13,212 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 09:16:13,214 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 09:16:13,226 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 09:16:13,227 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 09:16:13,228 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 09:16:13,229 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 09:16:13,232 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 09:16:13,234 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 09:16:13,236 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 09:16:13,237 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-03 09:16:13,237 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-03 09:16:13,238 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-03 09:16:13,239 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-03 09:16:13,243 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-03 09:16:13,244 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-03 09:16:13,245 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-03 09:16:13,253 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-03 09:16:13,255 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-03 09:16:13,262 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-03 09:16:13,263 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-03 09:16:13,264 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-03 09:16:13,269 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-03 09:16:13,284 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-03 09:16:13,305 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 09:16:13,305 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 09:16:13,306 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 09:16:13,306 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 09:16:13,307 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 09:16:13,307 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 09:16:13,307 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 09:16:13,308 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 09:16:13,308 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 09:16:13,308 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 09:16:13,308 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 09:16:13,309 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 09:16:13,309 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 09:16:13,309 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 09:16:13,309 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 09:16:13,309 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 09:16:13,310 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 09:16:13,310 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 09:16:13,310 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 09:16:13,310 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 09:16:13,310 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 09:16:13,311 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 09:16:13,311 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:16:13,311 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 09:16:13,311 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 09:16:13,311 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 09:16:13,312 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 09:16:13,312 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 09:16:13,312 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 09:16:13,312 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 09:16:13,312 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-03 09:16:13,355 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 09:16:13,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 09:16:13,370 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 09:16:13,372 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 09:16:13,372 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 09:16:13,373 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl [2018-10-03 09:16:13,373 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/up.i_4.bpl' [2018-10-03 09:16:13,423 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 09:16:13,426 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 09:16:13,427 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 09:16:13,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 09:16:13,427 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 09:16:13,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:13" (1/1) ... [2018-10-03 09:16:13,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:13" (1/1) ... [2018-10-03 09:16:13,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 09:16:13,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 09:16:13,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 09:16:13,464 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 09:16:13,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:13" (1/1) ... [2018-10-03 09:16:13,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:13" (1/1) ... [2018-10-03 09:16:13,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:13" (1/1) ... [2018-10-03 09:16:13,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:13" (1/1) ... [2018-10-03 09:16:13,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:13" (1/1) ... [2018-10-03 09:16:13,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:13" (1/1) ... [2018-10-03 09:16:13,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:13" (1/1) ... [2018-10-03 09:16:13,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 09:16:13,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 09:16:13,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 09:16:13,484 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 09:16:13,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:16:13,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 09:16:13,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 09:16:13,834 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 09:16:13,834 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:16:13 BoogieIcfgContainer [2018-10-03 09:16:13,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 09:16:13,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 09:16:13,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 09:16:13,839 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 09:16:13,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:16:13" (1/2) ... [2018-10-03 09:16:13,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24f394e7 and model type up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 09:16:13, skipping insertion in model container [2018-10-03 09:16:13,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:16:13" (2/2) ... [2018-10-03 09:16:13,843 INFO L112 eAbstractionObserver]: Analyzing ICFG up.i_4.bpl [2018-10-03 09:16:13,853 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 09:16:13,861 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 09:16:13,918 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 09:16:13,919 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 09:16:13,920 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 09:16:13,920 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 09:16:13,920 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 09:16:13,920 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 09:16:13,920 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 09:16:13,921 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 09:16:13,921 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 09:16:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-03 09:16:13,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 09:16:13,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:13,957 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-03 09:16:13,958 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:13,965 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:13,965 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-10-03 09:16:13,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:13,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:14,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:14,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:14,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:14,235 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:16:14,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 09:16:14,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 09:16:14,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 09:16:14,279 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:14,285 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-03 09:16:14,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:14,442 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-10-03 09:16:14,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 09:16:14,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-03 09:16:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:14,458 INFO L225 Difference]: With dead ends: 16 [2018-10-03 09:16:14,458 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 09:16:14,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 3 [2018-10-03 09:16:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 09:16:14,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 09:16:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 09:16:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-03 09:16:14,496 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-03 09:16:14,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:14,496 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-03 09:16:14,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 09:16:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-03 09:16:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 09:16:14,497 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:14,497 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-03 09:16:14,498 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:14,498 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-10-03 09:16:14,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:14,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:14,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:14,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:14,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:14,770 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:16:14,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-03 09:16:14,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 09:16:14,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 09:16:14,772 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:14,772 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-03 09:16:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:14,884 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-03 09:16:14,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 09:16:14,886 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-03 09:16:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:14,887 INFO L225 Difference]: With dead ends: 17 [2018-10-03 09:16:14,887 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 09:16:14,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 4 [2018-10-03 09:16:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 09:16:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-10-03 09:16:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 09:16:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-03 09:16:14,892 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-03 09:16:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:14,893 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-03 09:16:14,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 09:16:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-03 09:16:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 09:16:14,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:14,894 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-03 09:16:14,894 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:14,895 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:14,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-10-03 09:16:14,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:14,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:14,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:14,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:14,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:14,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:15,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:15,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:15,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:15,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:15,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:15,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:15,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:15,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-03 09:16:15,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 09:16:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 09:16:15,438 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:15,438 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 8 states. [2018-10-03 09:16:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:15,595 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-03 09:16:15,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 09:16:15,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-10-03 09:16:15,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:15,598 INFO L225 Difference]: With dead ends: 20 [2018-10-03 09:16:15,598 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 09:16:15,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 6 [2018-10-03 09:16:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 09:16:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 09:16:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 09:16:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-03 09:16:15,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-03 09:16:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:15,605 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-03 09:16:15,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 09:16:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-03 09:16:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 09:16:15,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:15,606 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-03 09:16:15,607 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:15,607 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:15,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-10-03 09:16:15,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:15,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:15,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:15,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:15,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:15,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:15,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:15,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:15,760 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:15,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:15,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:15,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:15,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:15,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:15,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-03 09:16:15,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 09:16:15,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 09:16:15,997 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:15,997 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-03 09:16:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:16,232 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-03 09:16:16,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 09:16:16,233 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-03 09:16:16,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:16,234 INFO L225 Difference]: With dead ends: 21 [2018-10-03 09:16:16,234 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 09:16:16,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 7 [2018-10-03 09:16:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 09:16:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-03 09:16:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 09:16:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-03 09:16:16,241 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-03 09:16:16,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:16,241 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-03 09:16:16,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 09:16:16,242 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-03 09:16:16,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 09:16:16,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:16,243 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-03 09:16:16,243 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:16,243 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:16,243 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-10-03 09:16:16,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:16,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:16,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:16,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:16,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:16,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:16,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:16,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:16,371 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 09:16:16,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:16,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:16,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:16,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-10-03 09:16:16,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 09:16:16,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 09:16:16,822 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:16,822 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-10-03 09:16:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:16,981 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-03 09:16:16,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 09:16:16,983 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2018-10-03 09:16:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:16,984 INFO L225 Difference]: With dead ends: 26 [2018-10-03 09:16:16,984 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 09:16:16,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 6 [2018-10-03 09:16:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 09:16:16,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 09:16:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 09:16:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-03 09:16:16,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-10-03 09:16:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:16,989 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-03 09:16:16,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 09:16:16,990 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-03 09:16:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 09:16:16,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:16,990 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-10-03 09:16:16,991 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:16,991 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:16,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-10-03 09:16:16,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:16,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:16,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:16,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:16,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:17,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:17,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:17,126 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:17,140 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:17,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:17,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:17,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:17,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-03 09:16:17,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 09:16:17,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 09:16:17,239 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:17,239 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-03 09:16:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:17,343 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-03 09:16:17,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 09:16:17,344 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-03 09:16:17,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:17,345 INFO L225 Difference]: With dead ends: 25 [2018-10-03 09:16:17,346 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 09:16:17,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-03 09:16:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 09:16:17,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-03 09:16:17,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 09:16:17,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-03 09:16:17,351 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-03 09:16:17,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:17,352 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-03 09:16:17,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 09:16:17,352 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-03 09:16:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 09:16:17,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:17,353 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-03 09:16:17,353 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:17,353 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:17,354 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-10-03 09:16:17,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:17,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:17,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:17,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:17,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:17,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:17,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:17,493 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:16:17,568 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 09:16:17,569 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:17,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:17,790 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:17,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-03 09:16:17,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 09:16:17,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 09:16:17,791 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:17,791 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 14 states. [2018-10-03 09:16:17,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:17,970 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-03 09:16:17,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 09:16:17,970 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2018-10-03 09:16:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:17,971 INFO L225 Difference]: With dead ends: 32 [2018-10-03 09:16:17,971 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 09:16:17,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 7 [2018-10-03 09:16:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 09:16:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 09:16:17,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 09:16:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-03 09:16:17,976 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-03 09:16:17,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:17,977 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-03 09:16:17,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 09:16:17,977 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-03 09:16:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 09:16:17,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:17,978 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-03 09:16:17,978 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:17,979 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:17,979 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-10-03 09:16:17,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:17,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:17,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:17,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:17,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:18,091 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:18,091 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:18,106 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:16:18,162 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-03 09:16:18,162 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:18,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:18,254 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:18,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-03 09:16:18,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 09:16:18,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 09:16:18,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:18,255 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-03 09:16:18,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:18,366 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-03 09:16:18,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 09:16:18,367 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-03 09:16:18,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:18,368 INFO L225 Difference]: With dead ends: 29 [2018-10-03 09:16:18,368 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 09:16:18,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 11 [2018-10-03 09:16:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 09:16:18,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-10-03 09:16:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 09:16:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-03 09:16:18,375 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-03 09:16:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:18,375 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-03 09:16:18,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 09:16:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-03 09:16:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 09:16:18,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:18,376 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-03 09:16:18,377 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:18,377 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:18,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-10-03 09:16:18,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:18,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:18,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:18,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:18,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:18,531 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:18,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:18,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:18,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:18,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:18,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:18,701 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:18,701 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-03 09:16:18,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:16:18,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:16:18,702 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:18,702 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 17 states. [2018-10-03 09:16:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:18,994 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-03 09:16:18,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 09:16:18,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2018-10-03 09:16:18,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:18,995 INFO L225 Difference]: With dead ends: 38 [2018-10-03 09:16:18,996 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 09:16:18,996 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 9 [2018-10-03 09:16:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 09:16:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 09:16:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 09:16:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-03 09:16:19,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-03 09:16:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:19,002 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-03 09:16:19,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:16:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-03 09:16:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 09:16:19,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:19,003 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-03 09:16:19,003 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:19,004 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:19,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-10-03 09:16:19,004 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:19,004 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:19,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:19,005 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:19,005 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:19,136 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:19,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:19,136 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:19,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:19,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:19,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:19,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:19,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:19,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-03 09:16:19,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 09:16:19,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 09:16:19,402 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:19,402 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-10-03 09:16:19,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:19,526 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-03 09:16:19,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 09:16:19,527 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-10-03 09:16:19,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:19,528 INFO L225 Difference]: With dead ends: 33 [2018-10-03 09:16:19,528 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 09:16:19,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.0s impTime 13 [2018-10-03 09:16:19,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 09:16:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-03 09:16:19,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 09:16:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-03 09:16:19,534 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-03 09:16:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:19,535 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-03 09:16:19,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 09:16:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-03 09:16:19,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 09:16:19,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:19,536 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-03 09:16:19,536 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:19,536 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:19,536 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-10-03 09:16:19,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:19,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:19,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:19,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:19,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:19,685 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:19,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:19,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:19,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 09:16:19,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:19,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:20,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:20,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-03 09:16:20,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 09:16:20,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 09:16:20,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:20,192 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 20 states. [2018-10-03 09:16:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:20,521 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-03 09:16:20,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 09:16:20,522 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2018-10-03 09:16:20,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:20,523 INFO L225 Difference]: With dead ends: 44 [2018-10-03 09:16:20,523 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 09:16:20,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 9 [2018-10-03 09:16:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 09:16:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 09:16:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 09:16:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-03 09:16:20,530 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-03 09:16:20,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:20,530 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-03 09:16:20,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 09:16:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-03 09:16:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 09:16:20,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:20,532 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-03 09:16:20,532 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:20,532 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:20,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-10-03 09:16:20,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:20,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:20,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:20,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:20,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:20,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:20,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:20,882 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:20,904 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:20,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:20,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:20,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:20,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-03 09:16:20,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 09:16:20,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 09:16:20,999 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:20,999 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-03 09:16:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:21,227 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-03 09:16:21,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 09:16:21,227 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-03 09:16:21,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:21,227 INFO L225 Difference]: With dead ends: 37 [2018-10-03 09:16:21,228 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 09:16:21,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 15 [2018-10-03 09:16:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 09:16:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-03 09:16:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 09:16:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-03 09:16:21,235 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-10-03 09:16:21,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:21,235 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-03 09:16:21,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 09:16:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-03 09:16:21,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 09:16:21,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:21,236 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-03 09:16:21,236 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:21,236 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:21,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-10-03 09:16:21,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:21,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:21,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:21,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:21,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:21,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:21,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:21,485 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:16:21,545 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 09:16:21,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:21,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:21,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:21,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2018-10-03 09:16:21,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 09:16:21,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 09:16:21,710 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:21,710 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 23 states. [2018-10-03 09:16:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:22,058 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-03 09:16:22,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 09:16:22,058 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2018-10-03 09:16:22,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:22,059 INFO L225 Difference]: With dead ends: 50 [2018-10-03 09:16:22,059 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 09:16:22,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 10 [2018-10-03 09:16:22,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 09:16:22,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 09:16:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 09:16:22,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-03 09:16:22,066 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-03 09:16:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:22,067 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-03 09:16:22,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 09:16:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-03 09:16:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 09:16:22,068 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:22,068 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-03 09:16:22,068 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:22,068 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:22,068 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-10-03 09:16:22,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:22,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:22,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:22,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:22,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:22,251 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:22,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:22,258 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:16:22,288 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-03 09:16:22,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:22,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:22,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:22,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-03 09:16:22,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 09:16:22,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 09:16:22,578 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:22,578 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-10-03 09:16:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:22,776 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-03 09:16:22,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 09:16:22,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-10-03 09:16:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:22,778 INFO L225 Difference]: With dead ends: 41 [2018-10-03 09:16:22,778 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 09:16:22,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.0s impTime 17 [2018-10-03 09:16:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 09:16:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-03 09:16:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 09:16:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-03 09:16:22,784 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-03 09:16:22,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:22,785 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-03 09:16:22,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 09:16:22,785 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-03 09:16:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 09:16:22,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:22,786 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-03 09:16:22,786 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:22,786 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:22,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-10-03 09:16:22,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:22,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:22,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:22,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:22,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:23,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:23,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:23,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:23,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:23,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:23,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-03 09:16:23,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 09:16:23,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 09:16:23,660 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:23,660 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 26 states. [2018-10-03 09:16:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:23,920 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-03 09:16:23,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 09:16:23,920 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2018-10-03 09:16:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:23,921 INFO L225 Difference]: With dead ends: 56 [2018-10-03 09:16:23,921 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 09:16:23,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 11 [2018-10-03 09:16:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 09:16:23,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 09:16:23,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 09:16:23,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-03 09:16:23,928 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-03 09:16:23,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:23,928 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-03 09:16:23,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 09:16:23,928 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-03 09:16:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 09:16:23,929 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:23,929 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-03 09:16:23,929 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:23,929 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-10-03 09:16:23,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:23,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:23,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:23,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:23,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:24,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:24,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:24,062 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:24,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:24,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:24,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:24,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:24,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-03 09:16:24,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 09:16:24,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 09:16:24,203 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:24,204 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-03 09:16:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:24,495 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-03 09:16:24,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 09:16:24,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-03 09:16:24,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:24,496 INFO L225 Difference]: With dead ends: 45 [2018-10-03 09:16:24,496 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 09:16:24,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 19 [2018-10-03 09:16:24,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 09:16:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-03 09:16:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 09:16:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-03 09:16:24,504 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-03 09:16:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:24,504 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-03 09:16:24,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 09:16:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-03 09:16:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 09:16:24,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:24,506 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-03 09:16:24,506 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:24,506 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:24,506 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-10-03 09:16:24,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:24,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:24,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:24,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:24,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:25,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:25,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:25,112 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:25,146 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 09:16:25,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:25,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:25,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:25,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-03 09:16:25,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 09:16:25,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 09:16:25,335 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:25,335 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 29 states. [2018-10-03 09:16:25,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:25,647 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-03 09:16:25,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 09:16:25,647 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 38 [2018-10-03 09:16:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:25,648 INFO L225 Difference]: With dead ends: 62 [2018-10-03 09:16:25,648 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 09:16:25,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 12 [2018-10-03 09:16:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 09:16:25,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 09:16:25,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 09:16:25,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-03 09:16:25,655 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-10-03 09:16:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:25,655 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-03 09:16:25,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 09:16:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-03 09:16:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 09:16:25,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:25,656 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-03 09:16:25,656 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:25,656 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:25,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-10-03 09:16:25,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:25,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:25,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:25,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:25,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:25,809 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:25,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:25,818 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:25,840 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:25,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:25,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:25,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:25,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-03 09:16:25,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 09:16:25,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 09:16:25,946 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:25,946 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-10-03 09:16:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:26,127 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-03 09:16:26,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 09:16:26,127 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-03 09:16:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:26,128 INFO L225 Difference]: With dead ends: 49 [2018-10-03 09:16:26,128 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 09:16:26,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 21 [2018-10-03 09:16:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 09:16:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-03 09:16:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 09:16:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-03 09:16:26,137 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-03 09:16:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:26,137 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-03 09:16:26,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 09:16:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-03 09:16:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 09:16:26,138 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:26,138 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-03 09:16:26,138 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:26,139 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:26,139 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-10-03 09:16:26,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:26,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:26,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:26,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:26,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:26,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:26,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:26,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:16:26,745 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 09:16:26,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:26,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:26,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:26,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2018-10-03 09:16:26,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 09:16:26,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 09:16:26,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:26,968 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 32 states. [2018-10-03 09:16:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:27,329 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-03 09:16:27,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 09:16:27,330 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 42 [2018-10-03 09:16:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:27,330 INFO L225 Difference]: With dead ends: 68 [2018-10-03 09:16:27,330 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 09:16:27,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 13 [2018-10-03 09:16:27,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 09:16:27,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 09:16:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 09:16:27,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-03 09:16:27,340 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-03 09:16:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:27,340 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-03 09:16:27,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 09:16:27,340 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-03 09:16:27,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 09:16:27,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:27,341 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-03 09:16:27,341 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:27,342 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:27,342 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-10-03 09:16:27,342 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:27,342 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:27,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:27,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:27,343 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:27,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:27,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:27,519 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:16:27,554 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-03 09:16:27,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:27,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:27,641 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:27,663 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:27,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-03 09:16:27,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 09:16:27,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 09:16:27,664 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:27,664 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-03 09:16:27,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:27,827 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-03 09:16:27,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 09:16:27,828 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-03 09:16:27,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:27,829 INFO L225 Difference]: With dead ends: 53 [2018-10-03 09:16:27,829 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 09:16:27,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 23 [2018-10-03 09:16:27,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 09:16:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-10-03 09:16:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 09:16:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-03 09:16:27,836 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-10-03 09:16:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:27,836 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-03 09:16:27,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 09:16:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-03 09:16:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 09:16:27,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:27,837 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-03 09:16:27,837 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:27,837 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:27,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-10-03 09:16:27,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:27,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:27,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:27,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:27,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:28,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:28,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:28,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:28,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:28,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:28,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2018-10-03 09:16:28,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 09:16:28,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 09:16:28,489 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:28,489 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 35 states. [2018-10-03 09:16:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:28,897 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-03 09:16:28,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 09:16:28,897 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 46 [2018-10-03 09:16:28,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:28,898 INFO L225 Difference]: With dead ends: 74 [2018-10-03 09:16:28,898 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 09:16:28,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 14 [2018-10-03 09:16:28,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 09:16:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 09:16:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 09:16:28,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-03 09:16:28,905 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-10-03 09:16:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:28,905 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-03 09:16:28,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 09:16:28,906 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-03 09:16:28,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 09:16:28,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:28,906 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-03 09:16:28,906 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:28,907 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:28,907 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-10-03 09:16:28,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:28,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:28,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:28,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:28,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:29,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:29,096 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:29,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:29,129 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:29,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:29,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:29,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:29,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-03 09:16:29,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:16:29,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:16:29,401 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:29,401 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-10-03 09:16:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:29,627 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-03 09:16:29,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 09:16:29,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-03 09:16:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:29,631 INFO L225 Difference]: With dead ends: 57 [2018-10-03 09:16:29,631 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 09:16:29,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.1s impTime 25 [2018-10-03 09:16:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 09:16:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-10-03 09:16:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 09:16:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-03 09:16:29,640 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-03 09:16:29,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:29,641 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-03 09:16:29,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:16:29,641 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-03 09:16:29,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 09:16:29,641 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:29,642 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-03 09:16:29,642 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:29,642 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:29,642 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-10-03 09:16:29,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:29,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:29,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:29,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:29,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:30,745 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:30,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:30,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:30,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:30,810 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 09:16:30,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:30,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:31,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:31,051 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-03 09:16:31,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 09:16:31,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 09:16:31,051 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:31,052 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 38 states. [2018-10-03 09:16:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:31,638 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-03 09:16:31,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 09:16:31,639 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 50 [2018-10-03 09:16:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:31,640 INFO L225 Difference]: With dead ends: 80 [2018-10-03 09:16:31,640 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 09:16:31,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 15 [2018-10-03 09:16:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 09:16:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 09:16:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 09:16:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-03 09:16:31,646 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-03 09:16:31,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:31,646 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-03 09:16:31,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 09:16:31,646 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-03 09:16:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 09:16:31,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:31,647 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-03 09:16:31,647 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:31,647 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:31,647 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-10-03 09:16:31,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:31,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:31,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:31,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:31,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:31,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:31,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:31,983 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:32,014 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:32,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:32,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:32,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:32,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-03 09:16:32,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 09:16:32,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 09:16:32,150 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:32,150 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-03 09:16:32,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:32,491 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-03 09:16:32,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 09:16:32,491 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-03 09:16:32,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:32,492 INFO L225 Difference]: With dead ends: 61 [2018-10-03 09:16:32,492 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 09:16:32,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 27 [2018-10-03 09:16:32,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 09:16:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-03 09:16:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 09:16:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-03 09:16:32,502 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-10-03 09:16:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:32,503 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-03 09:16:32,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 09:16:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-03 09:16:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 09:16:32,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:32,504 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-03 09:16:32,504 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:32,504 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:32,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-10-03 09:16:32,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:32,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:32,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:32,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:32,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:32,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:33,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:33,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:33,564 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:16:33,606 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 09:16:33,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:33,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:33,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:33,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-03 09:16:33,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 09:16:33,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 09:16:33,897 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:33,897 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 41 states. [2018-10-03 09:16:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:34,412 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-03 09:16:34,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 09:16:34,412 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 54 [2018-10-03 09:16:34,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:34,413 INFO L225 Difference]: With dead ends: 86 [2018-10-03 09:16:34,413 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 09:16:34,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 16 [2018-10-03 09:16:34,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 09:16:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 09:16:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 09:16:34,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-03 09:16:34,421 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-03 09:16:34,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:34,421 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-03 09:16:34,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 09:16:34,421 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-03 09:16:34,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 09:16:34,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:34,422 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-03 09:16:34,422 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:34,422 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:34,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-10-03 09:16:34,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:34,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:34,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:34,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:34,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:34,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:34,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:34,593 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:16:34,634 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-03 09:16:34,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:34,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:34,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:34,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-03 09:16:34,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 09:16:34,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 09:16:34,772 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:34,772 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-03 09:16:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:35,045 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-03 09:16:35,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 09:16:35,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-10-03 09:16:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:35,047 INFO L225 Difference]: With dead ends: 65 [2018-10-03 09:16:35,047 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 09:16:35,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 29 [2018-10-03 09:16:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 09:16:35,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-03 09:16:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 09:16:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-03 09:16:35,057 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-03 09:16:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:35,057 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-03 09:16:35,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 09:16:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-03 09:16:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 09:16:35,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:35,058 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-03 09:16:35,058 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:35,058 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:35,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-10-03 09:16:35,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:35,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:35,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:35,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:35,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:35,548 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:35,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:35,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:35,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:35,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:35,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:35,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2018-10-03 09:16:35,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 09:16:35,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 09:16:35,895 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:35,895 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 44 states. [2018-10-03 09:16:36,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:36,439 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-03 09:16:36,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 09:16:36,439 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 58 [2018-10-03 09:16:36,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:36,440 INFO L225 Difference]: With dead ends: 92 [2018-10-03 09:16:36,440 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 09:16:36,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 17 [2018-10-03 09:16:36,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 09:16:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 09:16:36,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 09:16:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-03 09:16:36,447 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-03 09:16:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:36,447 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-03 09:16:36,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 09:16:36,447 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-03 09:16:36,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 09:16:36,448 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:36,448 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-03 09:16:36,448 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:36,448 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:36,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-10-03 09:16:36,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:36,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:36,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:36,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:36,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:37,467 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:37,467 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:37,474 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:37,511 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:37,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:37,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:37,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:37,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-03 09:16:37,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 09:16:37,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 09:16:37,631 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:37,631 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-03 09:16:37,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:37,922 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-03 09:16:37,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 09:16:37,923 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-03 09:16:37,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:37,924 INFO L225 Difference]: With dead ends: 69 [2018-10-03 09:16:37,924 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 09:16:37,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.6s impTime 31 [2018-10-03 09:16:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 09:16:37,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-10-03 09:16:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 09:16:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-03 09:16:37,933 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-03 09:16:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:37,934 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-03 09:16:37,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 09:16:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-03 09:16:37,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 09:16:37,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:37,934 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-03 09:16:37,935 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:37,935 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-10-03 09:16:37,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:37,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:37,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:37,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:37,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:38,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:38,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:38,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:38,348 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 09:16:38,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:38,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:38,670 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:38,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-10-03 09:16:38,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 09:16:38,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 09:16:38,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:38,671 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 47 states. [2018-10-03 09:16:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:40,228 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-03 09:16:40,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 09:16:40,228 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 62 [2018-10-03 09:16:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:40,228 INFO L225 Difference]: With dead ends: 98 [2018-10-03 09:16:40,229 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 09:16:40,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 18 [2018-10-03 09:16:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 09:16:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 09:16:40,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 09:16:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-03 09:16:40,238 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-10-03 09:16:40,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:40,238 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-03 09:16:40,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 09:16:40,239 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-03 09:16:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 09:16:40,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:40,239 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-03 09:16:40,240 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:40,240 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:40,240 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-10-03 09:16:40,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:40,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:40,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:40,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:40,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:40,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:40,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:40,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:40,498 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:40,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:40,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:40,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:40,651 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:40,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:40,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-03 09:16:40,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 09:16:40,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 09:16:40,672 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:40,672 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-10-03 09:16:40,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:40,932 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-03 09:16:40,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 09:16:40,933 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-10-03 09:16:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:40,934 INFO L225 Difference]: With dead ends: 73 [2018-10-03 09:16:40,934 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 09:16:40,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 33 [2018-10-03 09:16:40,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 09:16:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-10-03 09:16:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 09:16:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-03 09:16:40,943 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-03 09:16:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:40,944 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-03 09:16:40,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 09:16:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-03 09:16:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 09:16:40,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:40,945 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-03 09:16:40,945 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:40,945 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-10-03 09:16:40,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:40,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:40,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:40,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:40,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:41,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:41,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:41,462 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:16:41,711 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 09:16:41,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:41,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:42,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:42,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-10-03 09:16:42,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 09:16:42,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 09:16:42,873 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:42,873 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 50 states. [2018-10-03 09:16:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:43,689 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-03 09:16:43,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 09:16:43,690 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 66 [2018-10-03 09:16:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:43,690 INFO L225 Difference]: With dead ends: 104 [2018-10-03 09:16:43,690 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 09:16:43,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.2s impTime 19 [2018-10-03 09:16:43,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 09:16:43,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 09:16:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 09:16:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-03 09:16:43,700 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-03 09:16:43,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:43,700 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-03 09:16:43,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 09:16:43,700 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-03 09:16:43,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 09:16:43,701 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:43,701 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-03 09:16:43,701 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:43,701 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:43,701 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-10-03 09:16:43,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:43,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:43,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:43,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:43,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:44,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:44,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:44,154 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:16:44,201 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-03 09:16:44,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:44,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:44,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:44,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-03 09:16:44,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 09:16:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 09:16:44,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:44,536 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-03 09:16:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:45,931 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-03 09:16:45,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 09:16:45,932 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-03 09:16:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:45,933 INFO L225 Difference]: With dead ends: 77 [2018-10-03 09:16:45,933 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 09:16:45,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 35 [2018-10-03 09:16:45,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 09:16:45,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-10-03 09:16:45,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 09:16:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-03 09:16:45,946 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-10-03 09:16:45,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:45,946 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-03 09:16:45,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 09:16:45,947 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-03 09:16:45,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 09:16:45,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:45,947 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-03 09:16:45,947 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:45,948 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-10-03 09:16:45,948 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:45,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:45,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:45,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:45,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:47,240 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:47,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:47,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:47,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:47,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:47,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-03 09:16:47,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 09:16:47,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 09:16:47,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:47,773 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 53 states. [2018-10-03 09:16:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:49,061 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-03 09:16:49,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 09:16:49,061 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 70 [2018-10-03 09:16:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:49,062 INFO L225 Difference]: With dead ends: 110 [2018-10-03 09:16:49,062 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 09:16:49,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.6s impTime 20 [2018-10-03 09:16:49,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 09:16:49,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 09:16:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 09:16:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-03 09:16:49,072 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-10-03 09:16:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:49,072 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-03 09:16:49,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 09:16:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-03 09:16:49,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 09:16:49,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:49,073 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-03 09:16:49,073 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:49,073 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:49,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-10-03 09:16:49,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:49,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:49,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:49,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:49,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:49,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:49,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:49,470 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:49,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:49,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:49,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:49,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:49,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-03 09:16:49,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 09:16:49,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 09:16:49,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:49,719 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-10-03 09:16:50,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:50,089 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-03 09:16:50,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 09:16:50,090 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-10-03 09:16:50,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:50,090 INFO L225 Difference]: With dead ends: 81 [2018-10-03 09:16:50,090 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 09:16:50,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 37 [2018-10-03 09:16:50,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 09:16:50,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-03 09:16:50,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 09:16:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-03 09:16:50,102 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-03 09:16:50,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:50,102 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-03 09:16:50,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 09:16:50,103 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-03 09:16:50,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 09:16:50,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:50,103 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-03 09:16:50,103 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:50,104 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:50,104 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-10-03 09:16:50,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:50,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:50,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:50,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:50,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:50,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:50,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:50,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:16:50,726 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 09:16:50,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:50,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:51,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:51,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2018-10-03 09:16:51,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 09:16:51,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 09:16:51,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:51,176 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 56 states. [2018-10-03 09:16:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:52,320 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-03 09:16:52,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 09:16:52,320 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 74 [2018-10-03 09:16:52,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:52,321 INFO L225 Difference]: With dead ends: 116 [2018-10-03 09:16:52,321 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 09:16:52,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 21 [2018-10-03 09:16:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 09:16:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 09:16:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 09:16:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-03 09:16:52,331 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-03 09:16:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:52,331 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-03 09:16:52,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 09:16:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-03 09:16:52,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 09:16:52,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:52,332 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-03 09:16:52,332 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:52,332 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:52,332 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-10-03 09:16:52,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:52,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:52,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:52,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:52,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:52,581 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:52,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:52,588 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:16:52,630 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:16:52,630 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:52,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:52,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:52,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-03 09:16:52,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 09:16:52,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 09:16:52,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:52,824 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-03 09:16:53,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:53,195 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-03 09:16:53,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 09:16:53,196 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-03 09:16:53,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:53,197 INFO L225 Difference]: With dead ends: 85 [2018-10-03 09:16:53,197 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 09:16:53,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 39 [2018-10-03 09:16:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 09:16:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-03 09:16:53,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 09:16:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-03 09:16:53,208 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-10-03 09:16:53,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:53,208 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-03 09:16:53,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 09:16:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-03 09:16:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 09:16:53,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:53,209 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-03 09:16:53,209 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:53,210 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:53,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-10-03 09:16:53,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:53,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:53,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:53,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:53,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:53,731 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:53,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:53,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:53,742 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:16:53,799 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 09:16:53,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:53,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:54,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:54,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-10-03 09:16:54,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:16:54,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:16:54,280 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:54,280 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 59 states. [2018-10-03 09:16:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:55,629 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-03 09:16:55,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 09:16:55,629 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 78 [2018-10-03 09:16:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:55,630 INFO L225 Difference]: With dead ends: 122 [2018-10-03 09:16:55,630 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 09:16:55,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.2s impTime 22 [2018-10-03 09:16:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 09:16:55,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 09:16:55,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 09:16:55,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-03 09:16:55,642 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-03 09:16:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:55,642 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-03 09:16:55,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:16:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-03 09:16:55,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 09:16:55,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:55,643 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-03 09:16:55,643 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:55,643 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-10-03 09:16:55,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:55,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:55,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:55,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:55,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:56,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:56,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:56,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:16:56,306 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-03 09:16:56,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:56,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:56,598 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:56,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-03 09:16:56,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 09:16:56,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 09:16:56,598 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:56,598 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-03 09:16:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:56,948 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-03 09:16:56,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 09:16:56,948 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-03 09:16:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:56,949 INFO L225 Difference]: With dead ends: 89 [2018-10-03 09:16:56,949 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 09:16:56,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.4s impTime 41 [2018-10-03 09:16:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 09:16:56,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-03 09:16:56,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 09:16:56,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-03 09:16:56,964 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-03 09:16:56,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:56,964 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-03 09:16:56,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 09:16:56,965 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-03 09:16:56,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 09:16:56,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:56,965 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-03 09:16:56,965 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:56,965 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:56,965 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-10-03 09:16:56,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:56,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:56,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:56,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:16:56,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:57,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:57,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:57,627 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:57,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:58,140 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:58,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2018-10-03 09:16:58,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 09:16:58,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 09:16:58,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:58,142 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 62 states. [2018-10-03 09:16:59,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:16:59,150 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-03 09:16:59,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 09:16:59,150 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 82 [2018-10-03 09:16:59,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:16:59,151 INFO L225 Difference]: With dead ends: 128 [2018-10-03 09:16:59,151 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 09:16:59,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 23 [2018-10-03 09:16:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 09:16:59,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 09:16:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 09:16:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-03 09:16:59,163 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-03 09:16:59,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:16:59,163 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-03 09:16:59,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 09:16:59,163 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-03 09:16:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 09:16:59,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:16:59,164 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-03 09:16:59,164 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:16:59,164 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:16:59,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-10-03 09:16:59,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:16:59,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:16:59,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:59,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:16:59,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:16:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:16:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:59,507 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:16:59,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:16:59,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:16:59,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:16:59,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:16:59,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:16:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:16:59,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:16:59,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-03 09:16:59,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 09:16:59,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 09:16:59,746 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:16:59,746 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-03 09:17:00,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:00,169 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-03 09:17:00,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 09:17:00,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-03 09:17:00,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:00,170 INFO L225 Difference]: With dead ends: 93 [2018-10-03 09:17:00,170 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 09:17:00,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.3s impTime 43 [2018-10-03 09:17:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 09:17:00,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-10-03 09:17:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 09:17:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-03 09:17:00,182 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-03 09:17:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:00,183 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-03 09:17:00,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 09:17:00,183 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-03 09:17:00,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 09:17:00,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:00,183 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-03 09:17:00,183 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:00,184 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:00,184 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-10-03 09:17:00,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:00,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:00,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:00,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:00,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:00,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:00,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:00,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:00,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 09:17:00,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:00,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:01,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:01,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-03 09:17:01,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 09:17:01,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 09:17:01,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:01,423 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 65 states. [2018-10-03 09:17:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:02,736 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-03 09:17:02,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 09:17:02,736 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 86 [2018-10-03 09:17:02,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:02,737 INFO L225 Difference]: With dead ends: 134 [2018-10-03 09:17:02,737 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 09:17:02,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 24 [2018-10-03 09:17:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 09:17:02,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 09:17:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 09:17:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-03 09:17:02,749 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-10-03 09:17:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:02,749 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-03 09:17:02,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 09:17:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-03 09:17:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 09:17:02,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:02,749 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-03 09:17:02,750 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:02,750 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:02,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-10-03 09:17:02,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:02,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:02,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:02,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:02,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:03,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:03,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:03,185 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:03,240 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:03,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:03,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:03,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:03,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-03 09:17:03,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 09:17:03,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 09:17:03,417 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:03,417 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-10-03 09:17:03,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:03,866 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-03 09:17:03,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 09:17:03,866 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-10-03 09:17:03,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:03,866 INFO L225 Difference]: With dead ends: 97 [2018-10-03 09:17:03,867 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 09:17:03,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 45 [2018-10-03 09:17:03,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 09:17:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-10-03 09:17:03,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 09:17:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-03 09:17:03,880 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-03 09:17:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:03,881 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-03 09:17:03,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 09:17:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-03 09:17:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 09:17:03,881 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:03,881 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-03 09:17:03,881 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:03,881 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:03,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-10-03 09:17:03,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:03,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:03,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:03,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:03,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:04,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:04,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:04,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:04,759 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 09:17:04,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:04,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:05,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:05,319 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2018-10-03 09:17:05,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 09:17:05,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 09:17:05,320 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:05,321 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 68 states. [2018-10-03 09:17:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:06,501 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-03 09:17:06,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 09:17:06,501 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 90 [2018-10-03 09:17:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:06,501 INFO L225 Difference]: With dead ends: 140 [2018-10-03 09:17:06,501 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 09:17:06,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.3s impTime 25 [2018-10-03 09:17:06,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 09:17:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 09:17:06,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 09:17:06,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-03 09:17:06,515 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-03 09:17:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:06,515 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-03 09:17:06,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 09:17:06,516 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-03 09:17:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 09:17:06,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:06,516 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-03 09:17:06,517 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:06,517 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:06,517 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-10-03 09:17:06,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:06,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:06,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:06,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:06,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:06,889 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:06,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:06,897 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:06,965 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-03 09:17:06,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:06,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:07,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:07,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-03 09:17:07,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 09:17:07,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 09:17:07,167 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:07,167 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-03 09:17:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:07,765 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-03 09:17:07,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 09:17:07,766 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-03 09:17:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:07,766 INFO L225 Difference]: With dead ends: 101 [2018-10-03 09:17:07,766 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 09:17:07,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 47 [2018-10-03 09:17:07,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 09:17:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-03 09:17:07,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 09:17:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-03 09:17:07,780 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-10-03 09:17:07,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:07,780 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-03 09:17:07,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 09:17:07,780 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-03 09:17:07,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 09:17:07,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:07,781 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-03 09:17:07,781 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:07,781 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-10-03 09:17:07,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:07,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:07,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:07,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:07,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:08,596 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:08,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:08,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:08,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:09,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:09,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-10-03 09:17:09,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 09:17:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 09:17:09,316 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:09,316 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 71 states. [2018-10-03 09:17:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:10,585 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-03 09:17:10,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 09:17:10,585 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 94 [2018-10-03 09:17:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:10,586 INFO L225 Difference]: With dead ends: 146 [2018-10-03 09:17:10,586 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 09:17:10,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 31 [2018-10-03 09:17:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 09:17:10,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 09:17:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 09:17:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-03 09:17:10,599 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-10-03 09:17:10,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:10,599 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-03 09:17:10,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 09:17:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-03 09:17:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 09:17:10,600 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:10,600 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-03 09:17:10,601 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:10,601 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:10,601 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-10-03 09:17:10,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:10,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:10,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:10,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:10,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:11,076 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:11,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:11,084 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:11,143 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:11,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:11,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:11,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:11,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-03 09:17:11,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 09:17:11,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 09:17:11,337 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:11,337 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-10-03 09:17:11,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:11,899 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-03 09:17:11,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 09:17:11,899 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-10-03 09:17:11,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:11,900 INFO L225 Difference]: With dead ends: 105 [2018-10-03 09:17:11,901 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 09:17:11,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 49 [2018-10-03 09:17:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 09:17:11,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-03 09:17:11,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 09:17:11,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-03 09:17:11,916 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-03 09:17:11,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:11,916 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-03 09:17:11,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 09:17:11,916 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-03 09:17:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 09:17:11,917 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:11,917 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-03 09:17:11,917 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:11,917 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:11,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-10-03 09:17:11,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:11,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:11,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:11,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:11,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:13,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:13,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:13,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:13,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 09:17:13,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:13,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:16,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:16,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-10-03 09:17:16,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 09:17:16,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 09:17:16,054 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:16,054 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 74 states. [2018-10-03 09:17:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:17,396 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-03 09:17:17,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 09:17:17,396 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 98 [2018-10-03 09:17:17,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:17,397 INFO L225 Difference]: With dead ends: 152 [2018-10-03 09:17:17,397 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 09:17:17,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 2.3s impTime 27 [2018-10-03 09:17:17,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 09:17:17,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 09:17:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 09:17:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-03 09:17:17,415 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-03 09:17:17,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:17,415 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-03 09:17:17,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 09:17:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-03 09:17:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 09:17:17,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:17,415 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-03 09:17:17,416 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:17,416 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-10-03 09:17:17,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:17,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:17,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:17,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:17,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:17,899 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:17,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:17,908 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:17,971 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:17,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:17,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:18,162 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:18,162 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-03 09:17:18,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 09:17:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 09:17:18,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:18,163 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-03 09:17:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:18,701 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-03 09:17:18,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 09:17:18,701 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-03 09:17:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:18,702 INFO L225 Difference]: With dead ends: 109 [2018-10-03 09:17:18,702 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 09:17:18,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 51 [2018-10-03 09:17:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 09:17:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-03 09:17:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 09:17:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-03 09:17:18,721 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-10-03 09:17:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:18,722 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-03 09:17:18,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 09:17:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-03 09:17:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 09:17:18,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:18,722 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-03 09:17:18,722 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:18,722 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:18,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-10-03 09:17:18,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:18,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:18,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:18,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:18,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:19,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:19,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:19,791 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:19,873 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 09:17:19,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:19,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:20,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:20,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:20,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-03 09:17:20,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 09:17:20,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 09:17:20,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:20,566 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 77 states. [2018-10-03 09:17:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:22,095 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-03 09:17:22,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 09:17:22,095 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 102 [2018-10-03 09:17:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:22,096 INFO L225 Difference]: With dead ends: 158 [2018-10-03 09:17:22,096 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 09:17:22,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 28 [2018-10-03 09:17:22,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 09:17:22,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 09:17:22,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 09:17:22,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-03 09:17:22,119 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-03 09:17:22,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:22,119 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-03 09:17:22,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 09:17:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-03 09:17:22,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 09:17:22,120 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:22,120 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-03 09:17:22,120 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:22,120 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:22,121 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-10-03 09:17:22,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:22,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:22,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:22,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:22,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:22,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:23,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:23,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:23,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:23,426 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-03 09:17:23,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:23,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:23,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:23,886 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:23,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-03 09:17:23,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 09:17:23,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 09:17:23,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:23,890 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-10-03 09:17:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:24,537 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-03 09:17:24,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 09:17:24,538 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-10-03 09:17:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:24,539 INFO L225 Difference]: With dead ends: 113 [2018-10-03 09:17:24,539 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 09:17:24,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.1s impTime 53 [2018-10-03 09:17:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 09:17:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-10-03 09:17:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 09:17:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-03 09:17:24,559 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-03 09:17:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:24,559 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-03 09:17:24,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 09:17:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-03 09:17:24,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 09:17:24,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:24,560 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-03 09:17:24,560 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:24,561 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-10-03 09:17:24,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:24,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:24,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:24,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:24,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:26,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:26,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:26,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:26,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:27,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:27,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-03 09:17:27,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 09:17:27,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 09:17:27,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:27,244 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 80 states. [2018-10-03 09:17:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:29,064 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-03 09:17:29,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 09:17:29,065 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 106 [2018-10-03 09:17:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:29,066 INFO L225 Difference]: With dead ends: 164 [2018-10-03 09:17:29,066 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 09:17:29,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.5s impTime 29 [2018-10-03 09:17:29,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 09:17:29,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 09:17:29,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 09:17:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-03 09:17:29,082 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-03 09:17:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:29,082 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-03 09:17:29,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 09:17:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-03 09:17:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 09:17:29,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:29,083 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-03 09:17:29,083 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:29,084 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:29,084 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-10-03 09:17:29,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:29,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:29,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:29,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:29,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:29,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:29,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:29,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:29,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:29,640 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:29,641 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:29,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:29,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:29,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-03 09:17:29,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 09:17:29,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 09:17:29,874 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:29,875 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-03 09:17:30,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:30,417 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-03 09:17:30,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 09:17:30,418 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-03 09:17:30,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:30,419 INFO L225 Difference]: With dead ends: 117 [2018-10-03 09:17:30,419 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 09:17:30,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 55 [2018-10-03 09:17:30,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 09:17:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-10-03 09:17:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 09:17:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-03 09:17:30,438 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-03 09:17:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:30,438 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-03 09:17:30,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 09:17:30,439 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-03 09:17:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 09:17:30,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:30,439 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-03 09:17:30,440 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:30,440 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:30,440 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-10-03 09:17:30,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:30,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:30,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:30,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:30,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:31,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:31,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:31,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:31,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 09:17:31,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:31,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:32,310 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:32,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-10-03 09:17:32,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 09:17:32,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 09:17:32,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:32,312 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 83 states. [2018-10-03 09:17:33,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:33,468 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-03 09:17:33,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 09:17:33,468 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 110 [2018-10-03 09:17:33,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:33,468 INFO L225 Difference]: With dead ends: 170 [2018-10-03 09:17:33,469 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 09:17:33,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.6s impTime 30 [2018-10-03 09:17:33,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 09:17:33,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-03 09:17:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-03 09:17:33,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-03 09:17:33,491 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-10-03 09:17:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:33,491 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-03 09:17:33,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 09:17:33,491 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-03 09:17:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 09:17:33,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:33,491 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-03 09:17:33,492 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:33,492 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:33,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-10-03 09:17:33,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:33,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:33,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:33,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:33,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:33,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:33,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:33,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:33,860 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:33,927 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:33,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:33,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:34,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:34,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-03 09:17:34,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 09:17:34,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 09:17:34,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:34,176 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-10-03 09:17:34,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:34,899 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-03 09:17:34,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 09:17:34,899 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-10-03 09:17:34,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:34,900 INFO L225 Difference]: With dead ends: 121 [2018-10-03 09:17:34,900 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 09:17:34,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 57 [2018-10-03 09:17:34,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 09:17:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-03 09:17:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 09:17:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-03 09:17:34,920 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-03 09:17:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:34,921 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-03 09:17:34,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 09:17:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-03 09:17:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 09:17:34,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:34,921 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-03 09:17:34,921 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:34,922 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:34,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-10-03 09:17:34,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:34,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:34,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:34,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:34,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:35,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:35,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:35,966 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:36,051 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 09:17:36,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:36,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:36,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:36,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 85 [2018-10-03 09:17:36,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 09:17:36,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 09:17:36,897 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:36,897 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 86 states. [2018-10-03 09:17:38,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:38,890 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-03 09:17:38,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 09:17:38,890 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 114 [2018-10-03 09:17:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:38,891 INFO L225 Difference]: With dead ends: 176 [2018-10-03 09:17:38,891 INFO L226 Difference]: Without dead ends: 117 [2018-10-03 09:17:38,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.1s impTime 31 [2018-10-03 09:17:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-03 09:17:38,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-03 09:17:38,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-03 09:17:38,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-03 09:17:38,912 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-03 09:17:38,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:38,912 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-03 09:17:38,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 09:17:38,912 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-03 09:17:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 09:17:38,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:38,913 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-03 09:17:38,913 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:38,913 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-10-03 09:17:38,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:38,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:38,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:38,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:38,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:39,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:39,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:39,321 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:39,410 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-03 09:17:39,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:39,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:40,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:40,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-03 09:17:40,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 09:17:40,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 09:17:40,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:40,415 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-03 09:17:41,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:41,173 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-03 09:17:41,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 09:17:41,174 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-03 09:17:41,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:41,175 INFO L225 Difference]: With dead ends: 125 [2018-10-03 09:17:41,175 INFO L226 Difference]: Without dead ends: 123 [2018-10-03 09:17:41,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.6s impTime 59 [2018-10-03 09:17:41,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-03 09:17:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-03 09:17:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 09:17:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-03 09:17:41,197 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-10-03 09:17:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:41,198 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-03 09:17:41,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 09:17:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-03 09:17:41,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 09:17:41,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:41,198 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-03 09:17:41,199 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:41,199 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:41,199 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-10-03 09:17:41,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:41,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:41,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:41,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:41,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:42,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:42,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:42,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:42,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:43,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:43,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-10-03 09:17:43,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 09:17:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 09:17:43,808 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:43,808 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 89 states. [2018-10-03 09:17:45,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:45,795 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-03 09:17:45,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 09:17:45,795 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 118 [2018-10-03 09:17:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:45,796 INFO L225 Difference]: With dead ends: 182 [2018-10-03 09:17:45,796 INFO L226 Difference]: Without dead ends: 121 [2018-10-03 09:17:45,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.6s impTime 32 [2018-10-03 09:17:45,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-03 09:17:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-03 09:17:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-03 09:17:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-03 09:17:45,816 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-10-03 09:17:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:45,816 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-03 09:17:45,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 09:17:45,816 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-03 09:17:45,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-03 09:17:45,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:45,817 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-03 09:17:45,817 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:45,817 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-10-03 09:17:45,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:45,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:45,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:45,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:45,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:45,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:46,192 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:46,192 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:46,200 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:17:46,272 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:17:46,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:46,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:46,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:46,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-03 09:17:46,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 09:17:46,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 09:17:46,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:46,646 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-10-03 09:17:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:47,365 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-03 09:17:47,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 09:17:47,366 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-10-03 09:17:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:47,366 INFO L225 Difference]: With dead ends: 129 [2018-10-03 09:17:47,367 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 09:17:47,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 61 [2018-10-03 09:17:47,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 09:17:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-10-03 09:17:47,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-03 09:17:47,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-03 09:17:47,394 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-03 09:17:47,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:47,394 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-03 09:17:47,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 09:17:47,395 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-03 09:17:47,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-03 09:17:47,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:47,395 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-03 09:17:47,395 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:47,395 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:47,395 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-10-03 09:17:47,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:47,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:47,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:47,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:47,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:48,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:48,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:48,658 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:17:48,755 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 09:17:48,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:48,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:49,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:49,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2018-10-03 09:17:49,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 09:17:49,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 09:17:49,635 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:49,635 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 92 states. [2018-10-03 09:17:51,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:51,483 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-03 09:17:51,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 09:17:51,483 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 122 [2018-10-03 09:17:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:51,483 INFO L225 Difference]: With dead ends: 188 [2018-10-03 09:17:51,484 INFO L226 Difference]: Without dead ends: 125 [2018-10-03 09:17:51,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.3s impTime 33 [2018-10-03 09:17:51,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-03 09:17:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-03 09:17:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-03 09:17:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-03 09:17:51,509 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-03 09:17:51,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:51,509 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-03 09:17:51,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 09:17:51,510 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-03 09:17:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-03 09:17:51,510 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:51,510 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-03 09:17:51,510 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:51,510 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-10-03 09:17:51,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:51,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:51,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:51,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:51,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:51,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:51,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:51,951 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:17:52,030 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:17:52,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:52,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:52,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:52,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-03 09:17:52,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 09:17:52,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 09:17:52,264 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:52,264 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-03 09:17:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:53,058 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-03 09:17:53,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 09:17:53,059 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-03 09:17:53,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:53,059 INFO L225 Difference]: With dead ends: 133 [2018-10-03 09:17:53,060 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 09:17:53,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 63 [2018-10-03 09:17:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 09:17:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-10-03 09:17:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-03 09:17:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-03 09:17:53,082 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-10-03 09:17:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:53,082 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-03 09:17:53,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 09:17:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-03 09:17:53,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-03 09:17:53,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:53,083 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-03 09:17:53,083 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:53,084 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-10-03 09:17:53,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:53,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:53,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:53,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:53,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:54,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:54,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:54,167 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:17:54,267 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 09:17:54,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:54,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:54,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:54,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 94 [2018-10-03 09:17:54,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-03 09:17:54,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-03 09:17:54,974 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:54,974 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 95 states. [2018-10-03 09:17:56,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:56,247 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-03 09:17:56,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 09:17:56,247 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 126 [2018-10-03 09:17:56,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:56,248 INFO L225 Difference]: With dead ends: 194 [2018-10-03 09:17:56,248 INFO L226 Difference]: Without dead ends: 129 [2018-10-03 09:17:56,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 34 [2018-10-03 09:17:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-03 09:17:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-03 09:17:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-03 09:17:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-03 09:17:56,291 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-03 09:17:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:56,291 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-03 09:17:56,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-03 09:17:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-03 09:17:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 09:17:56,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:56,292 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-03 09:17:56,292 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:56,292 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:56,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-10-03 09:17:56,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:56,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:56,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:56,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:56,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:56,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:56,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:56,904 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:17:57,006 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-03 09:17:57,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:17:57,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:17:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:57,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:17:57,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-03 09:17:57,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 09:17:57,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 09:17:57,279 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:17:57,280 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-10-03 09:17:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:17:58,010 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-03 09:17:58,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 09:17:58,010 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-10-03 09:17:58,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:17:58,011 INFO L225 Difference]: With dead ends: 137 [2018-10-03 09:17:58,011 INFO L226 Difference]: Without dead ends: 135 [2018-10-03 09:17:58,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 65 [2018-10-03 09:17:58,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-03 09:17:58,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-10-03 09:17:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-03 09:17:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-03 09:17:58,034 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-03 09:17:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:17:58,034 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-03 09:17:58,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 09:17:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-03 09:17:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-03 09:17:58,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:17:58,035 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-03 09:17:58,035 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:17:58,035 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:17:58,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-10-03 09:17:58,035 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:17:58,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:17:58,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:58,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:17:58,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:17:58,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:17:59,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:17:59,364 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:17:59,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:17:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:17:59,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:00,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:00,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 97 [2018-10-03 09:18:00,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 09:18:00,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 09:18:00,471 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:00,471 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 98 states. [2018-10-03 09:18:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:02,813 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-03 09:18:02,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 09:18:02,813 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 130 [2018-10-03 09:18:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:02,814 INFO L225 Difference]: With dead ends: 200 [2018-10-03 09:18:02,814 INFO L226 Difference]: Without dead ends: 133 [2018-10-03 09:18:02,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.6s impTime 35 [2018-10-03 09:18:02,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-03 09:18:02,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-03 09:18:02,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-03 09:18:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-03 09:18:02,837 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-03 09:18:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:02,837 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-03 09:18:02,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 09:18:02,838 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-03 09:18:02,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-03 09:18:02,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:02,838 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-03 09:18:02,838 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:02,839 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:02,839 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-10-03 09:18:02,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:02,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:02,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:02,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:02,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:02,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:03,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:03,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:03,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:03,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:03,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:03,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:03,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:03,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-03 09:18:03,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 09:18:03,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 09:18:03,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:03,725 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-03 09:18:04,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:04,574 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-03 09:18:04,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 09:18:04,575 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-03 09:18:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:04,575 INFO L225 Difference]: With dead ends: 141 [2018-10-03 09:18:04,575 INFO L226 Difference]: Without dead ends: 139 [2018-10-03 09:18:04,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.5s impTime 67 [2018-10-03 09:18:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-03 09:18:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-03 09:18:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-03 09:18:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-03 09:18:04,601 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-03 09:18:04,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:04,602 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-03 09:18:04,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 09:18:04,602 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-03 09:18:04,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-03 09:18:04,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:04,603 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-03 09:18:04,603 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:04,603 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:04,603 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-10-03 09:18:04,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:04,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:04,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:04,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:04,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:06,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:06,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:06,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:06,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 09:18:06,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:06,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:07,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:07,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:07,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-10-03 09:18:07,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-03 09:18:07,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-03 09:18:07,349 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:07,349 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 101 states. [2018-10-03 09:18:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:10,095 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-03 09:18:10,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 09:18:10,095 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 134 [2018-10-03 09:18:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:10,096 INFO L225 Difference]: With dead ends: 206 [2018-10-03 09:18:10,096 INFO L226 Difference]: Without dead ends: 137 [2018-10-03 09:18:10,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 3.0s impTime 36 [2018-10-03 09:18:10,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-03 09:18:10,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-03 09:18:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-03 09:18:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-03 09:18:10,121 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-10-03 09:18:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:10,121 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-03 09:18:10,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-03 09:18:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-03 09:18:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-03 09:18:10,121 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:10,122 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-03 09:18:10,122 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:10,122 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:10,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-10-03 09:18:10,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:10,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:10,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:10,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:10,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:10,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:10,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:10,532 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:18:10,617 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:18:10,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:10,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:11,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:11,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-03 09:18:11,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 09:18:11,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 09:18:11,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:11,129 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-10-03 09:18:11,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:11,953 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-03 09:18:11,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 09:18:11,953 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-10-03 09:18:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:11,954 INFO L225 Difference]: With dead ends: 145 [2018-10-03 09:18:11,955 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 09:18:11,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.6s impTime 69 [2018-10-03 09:18:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 09:18:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-03 09:18:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-03 09:18:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-03 09:18:11,982 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-03 09:18:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:11,982 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-03 09:18:11,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 09:18:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-03 09:18:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-03 09:18:11,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:11,983 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-03 09:18:11,983 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:11,984 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:11,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-10-03 09:18:11,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:11,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:11,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:11,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:11,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:13,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:13,688 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 [2018-10-03 09:18:13,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:13,820 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-03 09:18:13,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:13,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:15,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:15,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 103 [2018-10-03 09:18:15,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 09:18:15,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 09:18:15,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:15,101 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 104 states. [2018-10-03 09:18:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:17,766 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-03 09:18:17,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 09:18:17,767 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 138 [2018-10-03 09:18:17,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:17,767 INFO L225 Difference]: With dead ends: 212 [2018-10-03 09:18:17,767 INFO L226 Difference]: Without dead ends: 141 [2018-10-03 09:18:17,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time 3.2s impTime 37 [2018-10-03 09:18:17,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-03 09:18:17,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-03 09:18:17,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-03 09:18:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-03 09:18:17,794 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-03 09:18:17,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:17,794 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-03 09:18:17,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 09:18:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-03 09:18:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-03 09:18:17,795 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:17,795 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-03 09:18:17,795 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:17,795 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:17,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-10-03 09:18:17,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:17,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:17,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:17,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:17,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:18,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:18,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:18,181 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:18:18,298 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-03 09:18:18,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:18,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:18,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:18,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:18,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-03 09:18:18,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 09:18:18,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 09:18:18,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:18,558 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-03 09:18:19,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:19,596 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-03 09:18:19,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 09:18:19,597 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-03 09:18:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:19,598 INFO L225 Difference]: With dead ends: 149 [2018-10-03 09:18:19,598 INFO L226 Difference]: Without dead ends: 147 [2018-10-03 09:18:19,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 71 [2018-10-03 09:18:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-03 09:18:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-10-03 09:18:19,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 09:18:19,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-03 09:18:19,630 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-10-03 09:18:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:19,630 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-03 09:18:19,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 09:18:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-03 09:18:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 09:18:19,631 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:19,631 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-03 09:18:19,632 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:19,632 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:19,632 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-10-03 09:18:19,632 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:19,632 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:19,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:19,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:19,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:21,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:21,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:21,210 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:21,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:22,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:22,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 106 [2018-10-03 09:18:22,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-03 09:18:22,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-03 09:18:22,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:22,470 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 107 states. [2018-10-03 09:18:25,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:25,465 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-03 09:18:25,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 09:18:25,465 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 142 [2018-10-03 09:18:25,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:25,465 INFO L225 Difference]: With dead ends: 218 [2018-10-03 09:18:25,466 INFO L226 Difference]: Without dead ends: 145 [2018-10-03 09:18:25,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.2s impTime 38 [2018-10-03 09:18:25,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-03 09:18:25,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-03 09:18:25,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-03 09:18:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-03 09:18:25,501 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-10-03 09:18:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:25,501 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-03 09:18:25,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-03 09:18:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-03 09:18:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-03 09:18:25,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:25,502 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-03 09:18:25,502 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:25,502 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:25,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-10-03 09:18:25,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:25,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:25,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:25,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:25,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:26,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:26,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:26,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:26,101 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:26,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:26,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:26,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:26,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-03 09:18:26,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 09:18:26,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 09:18:26,367 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:26,367 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-10-03 09:18:27,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:27,252 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-03 09:18:27,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 09:18:27,252 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-10-03 09:18:27,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:27,253 INFO L225 Difference]: With dead ends: 153 [2018-10-03 09:18:27,253 INFO L226 Difference]: Without dead ends: 151 [2018-10-03 09:18:27,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 73 [2018-10-03 09:18:27,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-03 09:18:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-10-03 09:18:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-03 09:18:27,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-03 09:18:27,288 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-03 09:18:27,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:27,288 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-03 09:18:27,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 09:18:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-03 09:18:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 09:18:27,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:27,289 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-03 09:18:27,289 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:27,289 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:27,290 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-10-03 09:18:27,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:27,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:27,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:27,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:27,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:29,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:29,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:29,015 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:29,146 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-03 09:18:29,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:29,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:30,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:30,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 109 [2018-10-03 09:18:30,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-03 09:18:30,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-03 09:18:30,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:30,548 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 110 states. [2018-10-03 09:18:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:33,569 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-10-03 09:18:33,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 09:18:33,569 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 146 [2018-10-03 09:18:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:33,570 INFO L225 Difference]: With dead ends: 224 [2018-10-03 09:18:33,570 INFO L226 Difference]: Without dead ends: 149 [2018-10-03 09:18:33,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 3.4s impTime 52 [2018-10-03 09:18:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-03 09:18:33,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-03 09:18:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-03 09:18:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-03 09:18:33,605 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-03 09:18:33,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:33,605 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-03 09:18:33,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-03 09:18:33,606 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-03 09:18:33,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-03 09:18:33,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:33,607 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-03 09:18:33,607 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:33,607 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:33,607 INFO L82 PathProgramCache]: Analyzing trace with hash 719817893, now seen corresponding path program 70 times [2018-10-03 09:18:33,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:33,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:33,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:33,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:33,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:34,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:34,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:18:34,087 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:18:34,182 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:18:34,182 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:34,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:34,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:34,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-03 09:18:34,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 09:18:34,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 09:18:34,683 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:34,684 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-03 09:18:35,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:35,622 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-03 09:18:35,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 09:18:35,623 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-03 09:18:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:35,624 INFO L225 Difference]: With dead ends: 157 [2018-10-03 09:18:35,624 INFO L226 Difference]: Without dead ends: 155 [2018-10-03 09:18:35,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.8s impTime 75 [2018-10-03 09:18:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-03 09:18:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-10-03 09:18:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-03 09:18:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-03 09:18:35,660 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-10-03 09:18:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:35,661 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-03 09:18:35,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 09:18:35,661 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-03 09:18:35,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-03 09:18:35,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:35,662 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-03 09:18:35,662 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:35,662 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:35,662 INFO L82 PathProgramCache]: Analyzing trace with hash 255193761, now seen corresponding path program 71 times [2018-10-03 09:18:35,662 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:35,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:35,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:35,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:35,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:37,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:37,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:18:37,543 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:18:37,672 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 09:18:37,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:37,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:39,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:39,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-10-03 09:18:39,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-03 09:18:39,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-03 09:18:39,001 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:39,001 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 113 states. [2018-10-03 09:18:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:42,380 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-10-03 09:18:42,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 09:18:42,380 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 150 [2018-10-03 09:18:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:42,381 INFO L225 Difference]: With dead ends: 230 [2018-10-03 09:18:42,381 INFO L226 Difference]: Without dead ends: 153 [2018-10-03 09:18:42,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time 3.9s impTime 40 [2018-10-03 09:18:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-03 09:18:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-03 09:18:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-03 09:18:42,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-03 09:18:42,419 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-03 09:18:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:42,419 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-03 09:18:42,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-03 09:18:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-03 09:18:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-03 09:18:42,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:42,420 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-03 09:18:42,420 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:42,420 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:42,420 INFO L82 PathProgramCache]: Analyzing trace with hash 878185947, now seen corresponding path program 72 times [2018-10-03 09:18:42,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:42,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:42,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:42,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:42,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:42,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:42,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:18:42,948 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:18:43,076 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-03 09:18:43,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:43,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:43,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:43,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-03 09:18:43,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 09:18:43,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 09:18:43,369 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:43,369 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-10-03 09:18:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:44,394 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-10-03 09:18:44,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 09:18:44,395 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-10-03 09:18:44,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:44,396 INFO L225 Difference]: With dead ends: 161 [2018-10-03 09:18:44,396 INFO L226 Difference]: Without dead ends: 159 [2018-10-03 09:18:44,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 77 [2018-10-03 09:18:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-03 09:18:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-03 09:18:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-03 09:18:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-03 09:18:44,430 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-03 09:18:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:44,430 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-03 09:18:44,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 09:18:44,430 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-03 09:18:44,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-03 09:18:44,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:44,431 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-03 09:18:44,431 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:44,431 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:44,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2123038295, now seen corresponding path program 73 times [2018-10-03 09:18:44,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:44,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:44,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:44,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:44,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:46,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:46,323 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 [2018-10-03 09:18:46,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:46,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:47,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:47,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 115 [2018-10-03 09:18:47,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-10-03 09:18:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-10-03 09:18:47,790 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:47,790 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 116 states. [2018-10-03 09:18:51,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:51,325 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-03 09:18:51,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 09:18:51,325 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 154 [2018-10-03 09:18:51,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:51,326 INFO L225 Difference]: With dead ends: 236 [2018-10-03 09:18:51,326 INFO L226 Difference]: Without dead ends: 157 [2018-10-03 09:18:51,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time 3.9s impTime 41 [2018-10-03 09:18:51,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-03 09:18:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-03 09:18:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-03 09:18:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-03 09:18:51,356 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-03 09:18:51,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:51,356 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-03 09:18:51,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-10-03 09:18:51,356 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-03 09:18:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-03 09:18:51,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:51,357 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-03 09:18:51,357 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:51,357 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1034359663, now seen corresponding path program 74 times [2018-10-03 09:18:51,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:51,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:51,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:51,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:18:51,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:51,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:51,957 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 [2018-10-03 09:18:51,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:18:52,056 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:18:52,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:52,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:52,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:52,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:52,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-03 09:18:52,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 09:18:52,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 09:18:52,341 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:52,342 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-03 09:18:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:18:53,426 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-03 09:18:53,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 09:18:53,426 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-03 09:18:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:18:53,427 INFO L225 Difference]: With dead ends: 165 [2018-10-03 09:18:53,427 INFO L226 Difference]: Without dead ends: 163 [2018-10-03 09:18:53,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 79 [2018-10-03 09:18:53,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-03 09:18:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-03 09:18:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-03 09:18:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-03 09:18:53,463 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-03 09:18:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:18:53,463 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-03 09:18:53,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 09:18:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-03 09:18:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 09:18:53,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:18:53,464 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-03 09:18:53,464 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:18:53,464 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:18:53,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1882257523, now seen corresponding path program 75 times [2018-10-03 09:18:53,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:18:53,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:18:53,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:53,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:18:53,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:18:53,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:18:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:55,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:18:55,781 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 [2018-10-03 09:18:55,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:18:55,928 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-03 09:18:55,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:18:55,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:18:57,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:18:57,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:18:57,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 118 [2018-10-03 09:18:57,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-10-03 09:18:57,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-10-03 09:18:57,446 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:18:57,446 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 119 states. [2018-10-03 09:19:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:01,207 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-10-03 09:19:01,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 09:19:01,207 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 158 [2018-10-03 09:19:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:01,208 INFO L225 Difference]: With dead ends: 242 [2018-10-03 09:19:01,208 INFO L226 Difference]: Without dead ends: 161 [2018-10-03 09:19:01,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.6s impTime 42 [2018-10-03 09:19:01,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-03 09:19:01,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-03 09:19:01,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-03 09:19:01,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-03 09:19:01,246 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-10-03 09:19:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:01,247 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-03 09:19:01,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-10-03 09:19:01,247 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-03 09:19:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-03 09:19:01,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:01,248 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-03 09:19:01,248 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:01,248 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:01,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1109870791, now seen corresponding path program 76 times [2018-10-03 09:19:01,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:01,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:01,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:01,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:01,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:01,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:01,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:01,854 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 [2018-10-03 09:19:01,863 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:19:01,959 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:19:01,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:01,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:02,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:02,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:02,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-03 09:19:02,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 09:19:02,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 09:19:02,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:02,267 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-10-03 09:19:03,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:03,353 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-03 09:19:03,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 09:19:03,353 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-10-03 09:19:03,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:03,355 INFO L225 Difference]: With dead ends: 169 [2018-10-03 09:19:03,355 INFO L226 Difference]: Without dead ends: 167 [2018-10-03 09:19:03,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.9s impTime 81 [2018-10-03 09:19:03,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-03 09:19:03,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-10-03 09:19:03,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-03 09:19:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-03 09:19:03,391 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-03 09:19:03,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:03,391 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-03 09:19:03,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 09:19:03,392 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-03 09:19:03,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-03 09:19:03,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:03,393 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-03 09:19:03,393 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:03,393 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:03,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1433873987, now seen corresponding path program 77 times [2018-10-03 09:19:03,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:03,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:03,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:03,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:03,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:05,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:05,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:05,533 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 [2018-10-03 09:19:05,540 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:19:05,683 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-03 09:19:05,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:05,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:07,214 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:07,214 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 121 [2018-10-03 09:19:07,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-03 09:19:07,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-03 09:19:07,215 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:07,215 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 122 states. [2018-10-03 09:19:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:11,198 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-03 09:19:11,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 09:19:11,198 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 162 [2018-10-03 09:19:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:11,199 INFO L225 Difference]: With dead ends: 248 [2018-10-03 09:19:11,199 INFO L226 Difference]: Without dead ends: 165 [2018-10-03 09:19:11,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s Time 4.4s impTime 43 [2018-10-03 09:19:11,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-03 09:19:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-03 09:19:11,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-03 09:19:11,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-03 09:19:11,234 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-03 09:19:11,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:11,234 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-03 09:19:11,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-03 09:19:11,234 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-03 09:19:11,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-03 09:19:11,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:11,235 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-03 09:19:11,235 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:11,236 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:11,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352899, now seen corresponding path program 78 times [2018-10-03 09:19:11,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:11,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:11,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:11,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:11,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:11,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:11,642 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 [2018-10-03 09:19:11,650 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:19:11,794 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-03 09:19:11,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:11,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:12,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:12,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-03 09:19:12,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 09:19:12,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 09:19:12,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:12,164 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-10-03 09:19:13,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:13,197 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-10-03 09:19:13,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 09:19:13,197 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-10-03 09:19:13,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:13,198 INFO L225 Difference]: With dead ends: 173 [2018-10-03 09:19:13,199 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 09:19:13,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.7s impTime 83 [2018-10-03 09:19:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 09:19:13,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-10-03 09:19:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-03 09:19:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-03 09:19:13,239 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-10-03 09:19:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:13,240 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-03 09:19:13,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 09:19:13,240 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-03 09:19:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-03 09:19:13,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:13,241 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-03 09:19:13,241 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:13,241 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:13,241 INFO L82 PathProgramCache]: Analyzing trace with hash -705654151, now seen corresponding path program 79 times [2018-10-03 09:19:13,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:13,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:13,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:13,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:13,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:14,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:14,433 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 [2018-10-03 09:19:14,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:14,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:15,947 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:15,947 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 124 [2018-10-03 09:19:15,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-03 09:19:15,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-03 09:19:15,949 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:15,949 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 125 states. [2018-10-03 09:19:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:18,539 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-10-03 09:19:18,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 09:19:18,540 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 166 [2018-10-03 09:19:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:18,540 INFO L225 Difference]: With dead ends: 254 [2018-10-03 09:19:18,540 INFO L226 Difference]: Without dead ends: 169 [2018-10-03 09:19:18,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 2.8s impTime 44 [2018-10-03 09:19:18,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-03 09:19:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-03 09:19:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-03 09:19:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-03 09:19:18,581 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-10-03 09:19:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:18,581 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-03 09:19:18,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-03 09:19:18,581 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-03 09:19:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-03 09:19:18,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:18,582 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-10-03 09:19:18,583 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:18,583 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:18,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1476855373, now seen corresponding path program 80 times [2018-10-03 09:19:18,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:18,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:18,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:18,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:18,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:18,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:18,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:19:18,986 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:19:19,086 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:19:19,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:19,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:19,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:19,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-03 09:19:19,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 09:19:19,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 09:19:19,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:19,395 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-10-03 09:19:20,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:20,554 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-10-03 09:19:20,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 09:19:20,554 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-10-03 09:19:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:20,555 INFO L225 Difference]: With dead ends: 177 [2018-10-03 09:19:20,556 INFO L226 Difference]: Without dead ends: 175 [2018-10-03 09:19:20,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 85 [2018-10-03 09:19:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-03 09:19:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-10-03 09:19:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-03 09:19:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-03 09:19:20,594 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-10-03 09:19:20,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:20,594 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-03 09:19:20,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 09:19:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-03 09:19:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 09:19:20,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:20,595 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-03 09:19:20,595 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:20,595 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:20,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1918872529, now seen corresponding path program 81 times [2018-10-03 09:19:20,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:20,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:20,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:20,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:20,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:22,009 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:22,009 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 [2018-10-03 09:19:22,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:19:22,169 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-03 09:19:22,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:22,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:23,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:23,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 127 [2018-10-03 09:19:23,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-10-03 09:19:23,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-10-03 09:19:23,438 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:23,438 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 128 states. [2018-10-03 09:19:26,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:26,162 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-10-03 09:19:26,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 09:19:26,162 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 170 [2018-10-03 09:19:26,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:26,163 INFO L225 Difference]: With dead ends: 260 [2018-10-03 09:19:26,163 INFO L226 Difference]: Without dead ends: 173 [2018-10-03 09:19:26,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.0s impTime 45 [2018-10-03 09:19:26,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-03 09:19:26,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-03 09:19:26,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-03 09:19:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-03 09:19:26,201 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-10-03 09:19:26,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:26,202 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-03 09:19:26,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-10-03 09:19:26,202 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-03 09:19:26,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-03 09:19:26,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:26,203 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-10-03 09:19:26,203 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:26,203 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:26,203 INFO L82 PathProgramCache]: Analyzing trace with hash -900821399, now seen corresponding path program 82 times [2018-10-03 09:19:26,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:26,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:26,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:26,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:26,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:26,733 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:26,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:19:26,752 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:19:26,860 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:19:26,860 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:26,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:27,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:27,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-03 09:19:27,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 09:19:27,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 09:19:27,175 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:27,176 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-10-03 09:19:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:28,285 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-03 09:19:28,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 09:19:28,285 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-10-03 09:19:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:28,287 INFO L225 Difference]: With dead ends: 181 [2018-10-03 09:19:28,287 INFO L226 Difference]: Without dead ends: 179 [2018-10-03 09:19:28,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 87 [2018-10-03 09:19:28,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-03 09:19:28,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-10-03 09:19:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 09:19:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-10-03 09:19:28,332 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-10-03 09:19:28,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:28,332 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-10-03 09:19:28,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 09:19:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-10-03 09:19:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-03 09:19:28,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:28,333 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-10-03 09:19:28,333 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:28,334 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:28,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1893962597, now seen corresponding path program 83 times [2018-10-03 09:19:28,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:28,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:28,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:28,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:28,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:29,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:29,588 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 [2018-10-03 09:19:29,597 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:19:29,759 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-03 09:19:29,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:29,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:31,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:31,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 130 [2018-10-03 09:19:31,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-10-03 09:19:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-10-03 09:19:31,254 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:31,254 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 131 states. [2018-10-03 09:19:34,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:34,013 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-10-03 09:19:34,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 09:19:34,013 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 174 [2018-10-03 09:19:34,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:34,014 INFO L225 Difference]: With dead ends: 266 [2018-10-03 09:19:34,014 INFO L226 Difference]: Without dead ends: 177 [2018-10-03 09:19:34,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.1s impTime 46 [2018-10-03 09:19:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-03 09:19:34,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-03 09:19:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-03 09:19:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-10-03 09:19:34,055 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-10-03 09:19:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:34,056 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-10-03 09:19:34,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-10-03 09:19:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-10-03 09:19:34,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-03 09:19:34,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:34,057 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-10-03 09:19:34,057 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:34,057 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:34,057 INFO L82 PathProgramCache]: Analyzing trace with hash -619306849, now seen corresponding path program 84 times [2018-10-03 09:19:34,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:34,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:34,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:34,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:34,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:34,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:34,465 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 [2018-10-03 09:19:34,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:19:34,638 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-03 09:19:34,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:34,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:34,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:34,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-03 09:19:34,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 09:19:34,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 09:19:34,961 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:34,961 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-10-03 09:19:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:36,357 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-10-03 09:19:36,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 09:19:36,357 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-10-03 09:19:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:36,359 INFO L225 Difference]: With dead ends: 185 [2018-10-03 09:19:36,359 INFO L226 Difference]: Without dead ends: 183 [2018-10-03 09:19:36,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 89 [2018-10-03 09:19:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-03 09:19:36,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-10-03 09:19:36,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-03 09:19:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-03 09:19:36,402 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-10-03 09:19:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:36,402 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-03 09:19:36,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 09:19:36,402 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-03 09:19:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-03 09:19:36,403 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:36,403 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-10-03 09:19:36,403 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:36,404 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:36,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1846505499, now seen corresponding path program 85 times [2018-10-03 09:19:36,404 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:36,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:36,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:36,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:36,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:37,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:37,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:19:37,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:37,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:39,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:39,240 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:39,240 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 133 [2018-10-03 09:19:39,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-03 09:19:39,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-03 09:19:39,242 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:39,242 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 134 states. [2018-10-03 09:19:42,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:42,178 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-10-03 09:19:42,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 09:19:42,179 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 178 [2018-10-03 09:19:42,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:42,179 INFO L225 Difference]: With dead ends: 272 [2018-10-03 09:19:42,179 INFO L226 Difference]: Without dead ends: 181 [2018-10-03 09:19:42,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.1s impTime 58 [2018-10-03 09:19:42,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-03 09:19:42,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-03 09:19:42,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-03 09:19:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-10-03 09:19:42,222 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-10-03 09:19:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:42,222 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-10-03 09:19:42,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-03 09:19:42,222 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-10-03 09:19:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-03 09:19:42,222 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:42,223 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-10-03 09:19:42,223 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:42,223 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:42,223 INFO L82 PathProgramCache]: Analyzing trace with hash 895799381, now seen corresponding path program 86 times [2018-10-03 09:19:42,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:42,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:42,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:42,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:19:42,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:42,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:42,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:19:42,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:19:42,762 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:19:42,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:42,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:43,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:43,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-10-03 09:19:43,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 09:19:43,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 09:19:43,095 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:43,095 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-10-03 09:19:44,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:44,232 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-10-03 09:19:44,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 09:19:44,232 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-10-03 09:19:44,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:44,233 INFO L225 Difference]: With dead ends: 189 [2018-10-03 09:19:44,233 INFO L226 Difference]: Without dead ends: 187 [2018-10-03 09:19:44,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 91 [2018-10-03 09:19:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-03 09:19:44,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-10-03 09:19:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-03 09:19:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-10-03 09:19:44,277 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-10-03 09:19:44,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:44,277 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-10-03 09:19:44,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 09:19:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-10-03 09:19:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-03 09:19:44,278 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:44,278 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-10-03 09:19:44,278 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:44,279 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:44,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1869679185, now seen corresponding path program 87 times [2018-10-03 09:19:44,279 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:44,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:44,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:44,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:44,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:45,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:45,716 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 [2018-10-03 09:19:45,726 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:19:45,900 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-03 09:19:45,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:45,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:47,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:47,443 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 136 [2018-10-03 09:19:47,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-10-03 09:19:47,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-10-03 09:19:47,445 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:47,445 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 137 states. [2018-10-03 09:19:50,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:50,431 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2018-10-03 09:19:50,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 09:19:50,431 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 182 [2018-10-03 09:19:50,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:50,432 INFO L225 Difference]: With dead ends: 278 [2018-10-03 09:19:50,432 INFO L226 Difference]: Without dead ends: 185 [2018-10-03 09:19:50,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.2s impTime 48 [2018-10-03 09:19:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-03 09:19:50,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-03 09:19:50,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-03 09:19:50,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-10-03 09:19:50,475 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2018-10-03 09:19:50,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:50,475 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-10-03 09:19:50,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-10-03 09:19:50,475 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-10-03 09:19:50,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-03 09:19:50,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:50,476 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-10-03 09:19:50,476 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:50,476 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:50,476 INFO L82 PathProgramCache]: Analyzing trace with hash -800604789, now seen corresponding path program 88 times [2018-10-03 09:19:50,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:50,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:50,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:50,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:50,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:50,989 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:50,989 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 [2018-10-03 09:19:50,996 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:19:51,114 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:19:51,115 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:51,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:51,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:51,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-10-03 09:19:51,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 09:19:51,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 09:19:51,595 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:51,595 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 51 states. [2018-10-03 09:19:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:52,703 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-10-03 09:19:52,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 09:19:52,703 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 184 [2018-10-03 09:19:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:52,705 INFO L225 Difference]: With dead ends: 193 [2018-10-03 09:19:52,705 INFO L226 Difference]: Without dead ends: 191 [2018-10-03 09:19:52,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.8s impTime 93 [2018-10-03 09:19:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-03 09:19:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2018-10-03 09:19:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-03 09:19:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-10-03 09:19:52,756 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-10-03 09:19:52,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:52,756 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-10-03 09:19:52,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 09:19:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-10-03 09:19:52,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-03 09:19:52,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:52,757 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-10-03 09:19:52,758 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:52,758 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:52,758 INFO L82 PathProgramCache]: Analyzing trace with hash -582123001, now seen corresponding path program 89 times [2018-10-03 09:19:52,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:52,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:52,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:52,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:52,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:54,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:54,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:19:54,307 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:19:54,484 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-03 09:19:54,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:54,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:19:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:55,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:19:55,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 139 [2018-10-03 09:19:55,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-10-03 09:19:55,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-10-03 09:19:55,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:19:55,836 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 140 states. [2018-10-03 09:19:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:19:59,026 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-10-03 09:19:59,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 09:19:59,027 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 186 [2018-10-03 09:19:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:19:59,027 INFO L225 Difference]: With dead ends: 284 [2018-10-03 09:19:59,027 INFO L226 Difference]: Without dead ends: 189 [2018-10-03 09:19:59,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.3s impTime 49 [2018-10-03 09:19:59,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-03 09:19:59,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-03 09:19:59,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-03 09:19:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-10-03 09:19:59,073 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-10-03 09:19:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:19:59,073 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-10-03 09:19:59,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-10-03 09:19:59,073 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-10-03 09:19:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 09:19:59,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:19:59,074 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-10-03 09:19:59,074 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:19:59,074 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:19:59,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1060894655, now seen corresponding path program 90 times [2018-10-03 09:19:59,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:19:59,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:19:59,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:59,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:19:59,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:19:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:19:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:19:59,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:19:59,656 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 [2018-10-03 09:19:59,664 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:19:59,846 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-03 09:19:59,846 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:19:59,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:00,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:00,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-10-03 09:20:00,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 09:20:00,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 09:20:00,272 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:00,272 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-10-03 09:20:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:01,761 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-10-03 09:20:01,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 09:20:01,761 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-10-03 09:20:01,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:01,762 INFO L225 Difference]: With dead ends: 197 [2018-10-03 09:20:01,763 INFO L226 Difference]: Without dead ends: 195 [2018-10-03 09:20:01,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.2s impTime 95 [2018-10-03 09:20:01,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-03 09:20:01,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-10-03 09:20:01,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-03 09:20:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-03 09:20:01,811 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2018-10-03 09:20:01,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:01,811 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-03 09:20:01,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 09:20:01,811 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-03 09:20:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-03 09:20:01,812 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:01,812 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-10-03 09:20:01,812 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:01,812 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:01,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1612581059, now seen corresponding path program 91 times [2018-10-03 09:20:01,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:01,813 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:01,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:01,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:01,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:03,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:03,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 09:20:03,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:03,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:04,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:04,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:04,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 142 [2018-10-03 09:20:04,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-10-03 09:20:04,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-10-03 09:20:04,798 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:04,798 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 143 states. [2018-10-03 09:20:08,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:08,068 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2018-10-03 09:20:08,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 09:20:08,068 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 190 [2018-10-03 09:20:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:08,069 INFO L225 Difference]: With dead ends: 290 [2018-10-03 09:20:08,069 INFO L226 Difference]: Without dead ends: 193 [2018-10-03 09:20:08,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.3s impTime 50 [2018-10-03 09:20:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-03 09:20:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-03 09:20:08,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-03 09:20:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-10-03 09:20:08,117 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2018-10-03 09:20:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:08,117 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-10-03 09:20:08,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-10-03 09:20:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-10-03 09:20:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-03 09:20:08,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:08,118 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-10-03 09:20:08,118 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:08,118 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:08,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1003933815, now seen corresponding path program 92 times [2018-10-03 09:20:08,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:08,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:08,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:08,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:20:08,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:20:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:08,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:20:08,707 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 [2018-10-03 09:20:08,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:20:08,824 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:20:08,824 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:20:08,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:20:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:20:09,176 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:20:09,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-10-03 09:20:09,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 09:20:09,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 09:20:09,177 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:20:09,177 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 53 states. [2018-10-03 09:20:10,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:20:10,530 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-10-03 09:20:10,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 09:20:10,530 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 192 [2018-10-03 09:20:10,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:20:10,544 INFO L225 Difference]: With dead ends: 201 [2018-10-03 09:20:10,545 INFO L226 Difference]: Without dead ends: 199 [2018-10-03 09:20:10,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.1s impTime 97 [2018-10-03 09:20:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-03 09:20:10,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-10-03 09:20:10,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-03 09:20:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-10-03 09:20:10,594 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-10-03 09:20:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:20:10,594 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-10-03 09:20:10,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 09:20:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-10-03 09:20:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-03 09:20:10,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:20:10,595 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-10-03 09:20:10,595 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:20:10,595 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:20:10,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1587312141, now seen corresponding path program 93 times [2018-10-03 09:20:10,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:20:10,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:20:10,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:10,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:20:10,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:20:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 09:20:11,749 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 09:20:11,753 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 09:20:11,753 INFO L202 PluginConnector]: Adding new model up.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 09:20:11 BoogieIcfgContainer [2018-10-03 09:20:11,753 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 09:20:11,754 INFO L168 Benchmark]: Toolchain (without parser) took 238330.59 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -157.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 388.0 MB). Peak memory consumption was 230.7 MB. Max. memory is 7.1 GB. [2018-10-03 09:20:11,756 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:20:11,756 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:20:11,757 INFO L168 Benchmark]: Boogie Preprocessor took 19.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:20:11,757 INFO L168 Benchmark]: RCFGBuilder took 350.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 09:20:11,758 INFO L168 Benchmark]: TraceAbstraction took 237917.96 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -157.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 366.9 MB). Peak memory consumption was 209.6 MB. Max. memory is 7.1 GB. [2018-10-03 09:20:11,761 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 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 36.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.88 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 350.65 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237917.96 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -157.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 366.9 MB). Peak memory consumption was 209.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was analyzing trace of length 195 with TraceHistMax 48, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 193 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 237.8s OverallTime, 95 OverallIterations, 48 TraceHistogramMax, 108.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1553 SDtfs, 990 SDslu, 7591 SDs, 0 SdLazy, 69448 SolverSat, 4970 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16202 GetRequests, 9202 SyntacticMatches, 0 SemanticMatches, 7000 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 156.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=195occurred in iteration=94, 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: 1.9s AutomataMinimizationTime, 94 MinimizatonAttempts, 188 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.3s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 113.2s InterpolantComputationTime, 18598 NumberOfCodeBlocks, 18598 NumberOfCodeBlocksAsserted, 1297 NumberOfCheckSat, 18412 ConstructedInterpolants, 0 QuantifiedInterpolants, 8755782 SizeOfPredicates, 276 NumberOfNonLiveVariables, 36708 ConjunctsInSsa, 4876 ConjunctsInUnsatCore, 186 InterpolantComputations, 2 PerfectInterpolantSequences, 142878/281246 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/up.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_09-20-11-770.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/up.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_09-20-11-770.csv Completed graceful shutdown