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/fragtest_simple.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 00:42:22,949 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 00:42:22,951 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 00:42:22,965 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-01 00:42:23,002 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 [2018-10-01 00:42:23,018 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 00:42:23,018 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 00:42:23,019 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 00:42:23,019 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 00:42:23,019 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 00:42:23,020 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 00:42:23,020 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 00:42:23,020 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 00:42:23,020 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 00:42:23,020 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 00:42:23,021 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 00:42:23,021 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 00:42:23,021 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 00:42:23,021 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 00:42:23,021 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 00:42:23,021 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 00:42:23,022 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 00:42:23,022 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 00:42:23,022 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 00:42:23,022 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 00:42:23,022 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 00:42:23,023 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 00:42:23,023 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:42:23,023 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 00:42:23,023 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 00:42:23,023 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 00:42:23,024 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 00:42:23,024 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 00:42:23,024 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 00:42:23,024 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 00:42:23,024 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-01 00:42:23,084 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 00:42:23,099 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 00:42:23,105 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 00:42:23,106 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 00:42:23,107 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 00:42:23,107 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl [2018-10-01 00:42:23,108 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/fragtest_simple.i_4.bpl' [2018-10-01 00:42:23,160 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 00:42:23,165 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 00:42:23,165 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 00:42:23,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 00:42:23,166 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 00:42:23,185 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:42:23" (1/1) ... [2018-10-01 00:42:23,196 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:42:23" (1/1) ... [2018-10-01 00:42:23,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 00:42:23,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 00:42:23,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 00:42:23,203 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 00:42:23,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:42:23" (1/1) ... [2018-10-01 00:42:23,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:42:23" (1/1) ... [2018-10-01 00:42:23,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:42:23" (1/1) ... [2018-10-01 00:42:23,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:42:23" (1/1) ... [2018-10-01 00:42:23,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:42:23" (1/1) ... [2018-10-01 00:42:23,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:42:23" (1/1) ... [2018-10-01 00:42:23,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:42:23" (1/1) ... [2018-10-01 00:42:23,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 00:42:23,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 00:42:23,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 00:42:23,227 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 00:42:23,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:42:23" (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 [2018-10-01 00:42:23,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-01 00:42:23,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-01 00:42:23,564 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-01 00:42:23,565 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:42:23 BoogieIcfgContainer [2018-10-01 00:42:23,565 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 00:42:23,566 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 00:42:23,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 00:42:23,570 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 00:42:23,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:42:23" (1/2) ... [2018-10-01 00:42:23,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@514166e0 and model type fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 12:42:23, skipping insertion in model container [2018-10-01 00:42:23,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:42:23" (2/2) ... [2018-10-01 00:42:23,574 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bpl [2018-10-01 00:42:23,586 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 00:42:23,599 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-01 00:42:23,658 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 00:42:23,659 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 00:42:23,660 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 00:42:23,660 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 00:42:23,660 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 00:42:23,660 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 00:42:23,662 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 00:42:23,662 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 00:42:23,663 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 00:42:23,682 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-01 00:42:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 00:42:23,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:23,697 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-01 00:42:23,698 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:23,706 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:23,706 INFO L82 PathProgramCache]: Analyzing trace with hash 889599113, now seen corresponding path program 1 times [2018-10-01 00:42:23,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:23,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:23,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:23,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:23,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:24,046 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:42:24,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-01 00:42:24,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 00:42:24,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 00:42:24,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:24,070 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-01 00:42:24,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:24,273 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2018-10-01 00:42:24,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:42:24,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-01 00:42:24,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:24,289 INFO L225 Difference]: With dead ends: 14 [2018-10-01 00:42:24,289 INFO L226 Difference]: Without dead ends: 10 [2018-10-01 00:42:24,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:42:24,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-01 00:42:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-10-01 00:42:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-01 00:42:24,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-01 00:42:24,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-01 00:42:24,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:24,325 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-01 00:42:24,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 00:42:24,325 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-01 00:42:24,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 00:42:24,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:24,326 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-01 00:42:24,326 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:24,326 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:24,327 INFO L82 PathProgramCache]: Analyzing trace with hash 206308035, now seen corresponding path program 1 times [2018-10-01 00:42:24,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:24,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:24,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:24,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:24,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:24,388 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:42:24,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-01 00:42:24,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 00:42:24,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 00:42:24,391 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:24,391 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-10-01 00:42:24,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:24,542 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2018-10-01 00:42:24,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 00:42:24,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-01 00:42:24,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:24,544 INFO L225 Difference]: With dead ends: 17 [2018-10-01 00:42:24,544 INFO L226 Difference]: Without dead ends: 11 [2018-10-01 00:42:24,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 00:42:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-01 00:42:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-01 00:42:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-01 00:42:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-01 00:42:24,549 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-01 00:42:24,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:24,549 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-01 00:42:24,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 00:42:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-01 00:42:24,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 00:42:24,550 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:24,550 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-01 00:42:24,551 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:24,551 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:24,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1531170369, now seen corresponding path program 1 times [2018-10-01 00:42:24,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:24,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:24,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:24,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:24,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:24,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:24,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:24,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:24,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:25,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:25,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-01 00:42:25,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 00:42:25,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 00:42:25,122 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:25,123 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 9 states. [2018-10-01 00:42:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:26,182 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-01 00:42:26,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 00:42:26,184 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2018-10-01 00:42:26,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:26,185 INFO L225 Difference]: With dead ends: 21 [2018-10-01 00:42:26,185 INFO L226 Difference]: Without dead ends: 15 [2018-10-01 00:42:26,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:42:26,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-01 00:42:26,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-01 00:42:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-01 00:42:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-01 00:42:26,192 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-10-01 00:42:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:26,194 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-01 00:42:26,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 00:42:26,194 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-01 00:42:26,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 00:42:26,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:26,195 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-01 00:42:26,195 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:26,196 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:26,196 INFO L82 PathProgramCache]: Analyzing trace with hash -587211915, now seen corresponding path program 2 times [2018-10-01 00:42:26,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:26,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:26,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:26,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:26,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:26,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:26,337 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 [2018-10-01 00:42:26,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:42:26,367 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:42:26,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:26,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:26,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:26,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-01 00:42:26,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:42:26,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:42:26,601 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:26,601 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-10-01 00:42:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:27,256 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-10-01 00:42:27,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 00:42:27,258 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2018-10-01 00:42:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:27,259 INFO L225 Difference]: With dead ends: 27 [2018-10-01 00:42:27,260 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 00:42:27,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:42:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 00:42:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-01 00:42:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-01 00:42:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-01 00:42:27,266 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-10-01 00:42:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:27,266 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-01 00:42:27,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:42:27,267 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-01 00:42:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 00:42:27,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:27,268 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-01 00:42:27,268 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:27,268 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash 70717867, now seen corresponding path program 3 times [2018-10-01 00:42:27,269 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:27,269 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:27,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:27,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:27,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:27,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:27,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:27,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:42:27,489 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-01 00:42:27,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:27,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:27,622 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:27,642 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:27,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-10-01 00:42:27,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:42:27,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:42:27,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:27,644 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 12 states. [2018-10-01 00:42:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:28,001 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2018-10-01 00:42:28,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 00:42:28,001 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2018-10-01 00:42:28,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:28,002 INFO L225 Difference]: With dead ends: 31 [2018-10-01 00:42:28,002 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 00:42:28,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:42:28,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 00:42:28,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-01 00:42:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-01 00:42:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-01 00:42:28,008 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-01 00:42:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:28,008 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-01 00:42:28,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:42:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-01 00:42:28,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 00:42:28,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:28,009 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-01 00:42:28,009 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:28,010 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:28,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2045097383, now seen corresponding path program 4 times [2018-10-01 00:42:28,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:28,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:28,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:28,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:28,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:28,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:28,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:28,160 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:42:28,204 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:42:28,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:28,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:28,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:28,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-01 00:42:28,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 00:42:28,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 00:42:28,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:28,311 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-01 00:42:28,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:28,806 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2018-10-01 00:42:28,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 00:42:28,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-01 00:42:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:28,809 INFO L225 Difference]: With dead ends: 28 [2018-10-01 00:42:28,809 INFO L226 Difference]: Without dead ends: 26 [2018-10-01 00:42:28,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:42:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-01 00:42:28,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-10-01 00:42:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-01 00:42:28,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-01 00:42:28,816 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2018-10-01 00:42:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:28,816 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-01 00:42:28,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 00:42:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-01 00:42:28,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 00:42:28,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:28,817 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-01 00:42:28,818 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:28,818 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:28,818 INFO L82 PathProgramCache]: Analyzing trace with hash 37022875, now seen corresponding path program 5 times [2018-10-01 00:42:28,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:28,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:28,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:28,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:28,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:28,985 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:28,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:28,985 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 [2018-10-01 00:42:28,996 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:42:29,024 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 00:42:29,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:29,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:29,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:29,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-01 00:42:29,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 00:42:29,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 00:42:29,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:29,169 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-10-01 00:42:29,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:29,439 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2018-10-01 00:42:29,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:42:29,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2018-10-01 00:42:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:29,441 INFO L225 Difference]: With dead ends: 41 [2018-10-01 00:42:29,442 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 00:42:29,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:42:29,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 00:42:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-01 00:42:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-01 00:42:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-01 00:42:29,448 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-01 00:42:29,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:29,449 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-01 00:42:29,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 00:42:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-01 00:42:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 00:42:29,450 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:29,450 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-01 00:42:29,450 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:29,450 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:29,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1480612969, now seen corresponding path program 6 times [2018-10-01 00:42:29,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:29,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:29,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:29,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:29,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:29,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:29,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:29,604 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:42:29,647 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-10-01 00:42:29,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:29,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:29,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:29,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-10-01 00:42:29,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 00:42:29,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 00:42:29,801 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:29,802 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 18 states. [2018-10-01 00:42:30,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:30,368 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2018-10-01 00:42:30,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 00:42:30,368 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2018-10-01 00:42:30,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:30,369 INFO L225 Difference]: With dead ends: 43 [2018-10-01 00:42:30,369 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 00:42:30,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:42:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 00:42:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-01 00:42:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-01 00:42:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-01 00:42:30,376 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-01 00:42:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:30,376 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-01 00:42:30,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 00:42:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-01 00:42:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 00:42:30,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:30,377 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-01 00:42:30,377 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:30,377 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:30,378 INFO L82 PathProgramCache]: Analyzing trace with hash 360221587, now seen corresponding path program 7 times [2018-10-01 00:42:30,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:30,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:30,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:30,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:30,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:30,521 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:30,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:30,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:30,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:30,589 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:30,927 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:30,958 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:30,958 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-01 00:42:30,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:42:30,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:42:30,960 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:30,960 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-01 00:42:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:31,363 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-10-01 00:42:31,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 00:42:31,365 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-01 00:42:31,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:31,366 INFO L225 Difference]: With dead ends: 36 [2018-10-01 00:42:31,366 INFO L226 Difference]: Without dead ends: 34 [2018-10-01 00:42:31,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:42:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-01 00:42:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2018-10-01 00:42:31,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-01 00:42:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-01 00:42:31,373 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2018-10-01 00:42:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:31,373 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-01 00:42:31,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:42:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-01 00:42:31,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 00:42:31,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:31,375 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-01 00:42:31,375 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:31,375 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:31,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1263725703, now seen corresponding path program 8 times [2018-10-01 00:42:31,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:31,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:31,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:31,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:31,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:31,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:31,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:31,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:42:31,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:42:31,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:31,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 54 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:42:32,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:32,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2018-10-01 00:42:32,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 00:42:32,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 00:42:32,075 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:32,075 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 22 states. [2018-10-01 00:42:32,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:32,408 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2018-10-01 00:42:32,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 00:42:32,409 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-10-01 00:42:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:32,409 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:42:32,409 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 00:42:32,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:42:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 00:42:32,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-01 00:42:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-01 00:42:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-01 00:42:32,417 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-01 00:42:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:32,418 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-01 00:42:32,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 00:42:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-01 00:42:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 00:42:32,419 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:32,420 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-01 00:42:32,420 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:32,420 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:32,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1629808515, now seen corresponding path program 9 times [2018-10-01 00:42:32,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:32,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:32,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:32,423 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:32,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:32,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:32,832 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 [2018-10-01 00:42:32,841 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:42:32,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-01 00:42:32,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:32,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:33,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:33,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-10-01 00:42:33,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 00:42:33,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 00:42:33,171 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:33,171 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 24 states. [2018-10-01 00:42:33,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:33,772 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2018-10-01 00:42:33,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 00:42:33,772 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 34 [2018-10-01 00:42:33,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:33,773 INFO L225 Difference]: With dead ends: 55 [2018-10-01 00:42:33,773 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 00:42:33,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:42:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 00:42:33,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-01 00:42:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-01 00:42:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-01 00:42:33,780 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-01 00:42:33,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:33,780 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-01 00:42:33,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 00:42:33,780 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-01 00:42:33,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 00:42:33,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:33,781 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-01 00:42:33,782 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:33,782 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:33,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1248072575, now seen corresponding path program 10 times [2018-10-01 00:42:33,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:33,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:33,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:33,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:33,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:33,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:33,922 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 [2018-10-01 00:42:33,929 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:42:33,970 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:42:33,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:33,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:34,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:34,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-01 00:42:34,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:42:34,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:42:34,128 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:34,128 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-01 00:42:34,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:34,534 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-01 00:42:34,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 00:42:34,535 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-01 00:42:34,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:34,536 INFO L225 Difference]: With dead ends: 44 [2018-10-01 00:42:34,536 INFO L226 Difference]: Without dead ends: 42 [2018-10-01 00:42:34,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:42:34,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-01 00:42:34,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-01 00:42:34,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-01 00:42:34,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-01 00:42:34,543 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2018-10-01 00:42:34,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:34,543 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-01 00:42:34,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:42:34,543 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-01 00:42:34,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 00:42:34,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:34,544 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-01 00:42:34,544 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:34,544 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:34,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1910464909, now seen corresponding path program 11 times [2018-10-01 00:42:34,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:34,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:34,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:34,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:34,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:35,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:35,014 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 [2018-10-01 00:42:35,021 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:42:35,094 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:42:35,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:35,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:35,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:35,468 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-01 00:42:35,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 00:42:35,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 00:42:35,468 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:35,468 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 29 states. [2018-10-01 00:42:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:35,918 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2018-10-01 00:42:35,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 00:42:35,919 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2018-10-01 00:42:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:35,920 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:42:35,920 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:42:35,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:42:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:42:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-01 00:42:35,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-01 00:42:35,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-01 00:42:35,926 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-01 00:42:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:35,927 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-01 00:42:35,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 00:42:35,927 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-01 00:42:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 00:42:35,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:35,928 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-01 00:42:35,928 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:35,928 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:35,928 INFO L82 PathProgramCache]: Analyzing trace with hash 179690863, now seen corresponding path program 12 times [2018-10-01 00:42:35,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:35,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:35,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:35,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:35,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:36,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:36,113 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:36,121 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:42:36,161 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-01 00:42:36,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:36,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:36,375 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:36,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 29 [2018-10-01 00:42:36,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 00:42:36,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 00:42:36,376 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:36,376 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 30 states. [2018-10-01 00:42:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:37,000 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2018-10-01 00:42:37,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 00:42:37,001 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 42 [2018-10-01 00:42:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:37,001 INFO L225 Difference]: With dead ends: 67 [2018-10-01 00:42:37,002 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:42:37,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:42:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:42:37,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-01 00:42:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-01 00:42:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-01 00:42:37,010 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-01 00:42:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:37,010 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-01 00:42:37,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 00:42:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-01 00:42:37,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 00:42:37,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:37,011 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-01 00:42:37,011 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:37,011 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:37,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1225306773, now seen corresponding path program 13 times [2018-10-01 00:42:37,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:37,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:37,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:37,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:37,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:37,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:37,331 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 [2018-10-01 00:42:37,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:37,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:37,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:37,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-01 00:42:37,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 00:42:37,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 00:42:37,472 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:37,472 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-01 00:42:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:38,307 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-10-01 00:42:38,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 00:42:38,307 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-01 00:42:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:38,308 INFO L225 Difference]: With dead ends: 52 [2018-10-01 00:42:38,308 INFO L226 Difference]: Without dead ends: 50 [2018-10-01 00:42:38,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:42:38,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-01 00:42:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2018-10-01 00:42:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-01 00:42:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-01 00:42:38,317 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2018-10-01 00:42:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:38,317 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-01 00:42:38,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 00:42:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-01 00:42:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-01 00:42:38,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:38,318 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-01 00:42:38,319 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:38,319 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:38,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1452473761, now seen corresponding path program 14 times [2018-10-01 00:42:38,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:38,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:38,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:38,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:38,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:38,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:38,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:38,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:38,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:42:38,694 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:42:38,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:38,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 130 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:42:39,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:39,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 33 [2018-10-01 00:42:39,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 00:42:39,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 00:42:39,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:39,013 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 34 states. [2018-10-01 00:42:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:39,547 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2018-10-01 00:42:39,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 00:42:39,548 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 48 [2018-10-01 00:42:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:39,548 INFO L225 Difference]: With dead ends: 77 [2018-10-01 00:42:39,548 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:42:39,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 00:42:39,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:42:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-01 00:42:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-01 00:42:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-01 00:42:39,557 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-01 00:42:39,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:39,558 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-01 00:42:39,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 00:42:39,558 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-01 00:42:39,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-01 00:42:39,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:39,560 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-01 00:42:39,560 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:39,560 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:39,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1195476315, now seen corresponding path program 15 times [2018-10-01 00:42:39,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:39,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:39,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:39,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:39,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:41,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:41,354 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 [2018-10-01 00:42:41,363 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:42:41,432 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-01 00:42:41,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:41,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:41,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:41,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2018-10-01 00:42:41,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 00:42:41,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 00:42:41,723 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:41,723 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 36 states. [2018-10-01 00:42:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:42,413 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2018-10-01 00:42:42,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 00:42:42,414 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2018-10-01 00:42:42,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:42,414 INFO L225 Difference]: With dead ends: 79 [2018-10-01 00:42:42,414 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:42:42,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-10-01 00:42:42,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:42:42,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-01 00:42:42,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-01 00:42:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-01 00:42:42,422 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-01 00:42:42,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:42,423 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-01 00:42:42,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 00:42:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-01 00:42:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-01 00:42:42,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:42,424 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-01 00:42:42,424 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:42,424 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:42,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1040107177, now seen corresponding path program 16 times [2018-10-01 00:42:42,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:42,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:42,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:42,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:42,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:42,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:42,644 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 [2018-10-01 00:42:42,651 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:42:42,692 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:42:42,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:42,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:42,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:42,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-01 00:42:42,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 00:42:42,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 00:42:42,839 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:42,839 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-01 00:42:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:43,618 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2018-10-01 00:42:43,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 00:42:43,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-01 00:42:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:43,620 INFO L225 Difference]: With dead ends: 60 [2018-10-01 00:42:43,620 INFO L226 Difference]: Without dead ends: 58 [2018-10-01 00:42:43,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:42:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-01 00:42:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2018-10-01 00:42:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-01 00:42:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-01 00:42:43,627 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2018-10-01 00:42:43,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:43,627 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-01 00:42:43,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 00:42:43,627 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-01 00:42:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-01 00:42:43,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:43,628 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-01 00:42:43,629 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:43,629 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:43,629 INFO L82 PathProgramCache]: Analyzing trace with hash 75962443, now seen corresponding path program 17 times [2018-10-01 00:42:43,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:43,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:43,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:43,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:43,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:44,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:44,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:44,277 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:42:44,336 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-01 00:42:44,336 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:44,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:44,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:44,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-01 00:42:44,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 00:42:44,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 00:42:44,949 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:44,949 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 41 states. [2018-10-01 00:42:45,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:45,697 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2018-10-01 00:42:45,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 00:42:45,697 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 56 [2018-10-01 00:42:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:45,698 INFO L225 Difference]: With dead ends: 89 [2018-10-01 00:42:45,698 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:42:45,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 00:42:45,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:42:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-01 00:42:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-01 00:42:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-01 00:42:45,708 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-01 00:42:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:45,708 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-01 00:42:45,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 00:42:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-01 00:42:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-01 00:42:45,709 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:45,710 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-01 00:42:45,710 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:45,710 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1108795207, now seen corresponding path program 18 times [2018-10-01 00:42:45,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:45,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:45,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:45,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:45,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:46,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:46,028 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 [2018-10-01 00:42:46,035 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:42:46,086 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-01 00:42:46,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:46,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:46,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:46,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2018-10-01 00:42:46,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 00:42:46,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 00:42:46,366 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:46,366 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 42 states. [2018-10-01 00:42:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:47,176 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2018-10-01 00:42:47,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 00:42:47,176 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 58 [2018-10-01 00:42:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:47,177 INFO L225 Difference]: With dead ends: 91 [2018-10-01 00:42:47,177 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:42:47,177 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 00:42:47,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:42:47,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-01 00:42:47,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-01 00:42:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-01 00:42:47,184 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-01 00:42:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:47,185 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-01 00:42:47,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 00:42:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-01 00:42:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-01 00:42:47,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:47,186 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-01 00:42:47,186 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:47,186 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1523636035, now seen corresponding path program 19 times [2018-10-01 00:42:47,186 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:47,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:47,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:47,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:47,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:47,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:47,386 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 [2018-10-01 00:42:47,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:47,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:47,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:47,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-01 00:42:47,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 00:42:47,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 00:42:47,586 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:47,586 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-01 00:42:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:48,473 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-01 00:42:48,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 00:42:48,473 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-01 00:42:48,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:48,474 INFO L225 Difference]: With dead ends: 68 [2018-10-01 00:42:48,474 INFO L226 Difference]: Without dead ends: 66 [2018-10-01 00:42:48,475 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:42:48,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-01 00:42:48,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2018-10-01 00:42:48,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-01 00:42:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-01 00:42:48,484 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 60 [2018-10-01 00:42:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:48,484 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-01 00:42:48,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 00:42:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-01 00:42:48,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-01 00:42:48,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:48,485 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-01 00:42:48,486 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:48,486 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:48,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1329455159, now seen corresponding path program 20 times [2018-10-01 00:42:48,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:48,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:48,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:48,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:48,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:48,943 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:48,943 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 [2018-10-01 00:42:48,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:42:48,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:42:48,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:49,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 238 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:42:49,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:49,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 45 [2018-10-01 00:42:49,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 00:42:49,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 00:42:49,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:49,322 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 46 states. [2018-10-01 00:42:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:50,170 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2018-10-01 00:42:50,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 00:42:50,170 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 64 [2018-10-01 00:42:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:50,171 INFO L225 Difference]: With dead ends: 101 [2018-10-01 00:42:50,171 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:42:50,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 00:42:50,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:42:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-01 00:42:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-01 00:42:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-01 00:42:50,181 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-01 00:42:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:50,181 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-01 00:42:50,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 00:42:50,181 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-01 00:42:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-01 00:42:50,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:50,182 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-01 00:42:50,182 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:50,182 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:50,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1862593331, now seen corresponding path program 21 times [2018-10-01 00:42:50,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:50,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:50,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:50,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:50,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:50,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:50,513 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 [2018-10-01 00:42:50,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:42:50,578 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-01 00:42:50,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:50,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:50,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:50,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 47 [2018-10-01 00:42:50,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 00:42:50,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 00:42:50,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:50,904 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 48 states. [2018-10-01 00:42:51,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:51,874 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2018-10-01 00:42:51,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 00:42:51,874 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 66 [2018-10-01 00:42:51,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:51,875 INFO L225 Difference]: With dead ends: 103 [2018-10-01 00:42:51,875 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:42:51,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:42:51,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:42:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-01 00:42:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-01 00:42:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-01 00:42:51,882 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-01 00:42:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:51,882 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-01 00:42:51,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 00:42:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-01 00:42:51,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-01 00:42:51,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:51,883 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-01 00:42:51,884 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:51,884 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:51,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1187698897, now seen corresponding path program 22 times [2018-10-01 00:42:51,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:51,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:51,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:51,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:51,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:52,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:52,128 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 [2018-10-01 00:42:52,134 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:42:52,186 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:42:52,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:52,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:52,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:52,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-01 00:42:52,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 00:42:52,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 00:42:52,334 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:52,334 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-01 00:42:53,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:53,085 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2018-10-01 00:42:53,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 00:42:53,086 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-01 00:42:53,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:53,086 INFO L225 Difference]: With dead ends: 76 [2018-10-01 00:42:53,086 INFO L226 Difference]: Without dead ends: 74 [2018-10-01 00:42:53,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:42:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-01 00:42:53,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2018-10-01 00:42:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-01 00:42:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-01 00:42:53,093 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2018-10-01 00:42:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:53,093 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-01 00:42:53,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 00:42:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-01 00:42:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-01 00:42:53,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:53,094 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-01 00:42:53,094 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:53,094 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:53,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1105222179, now seen corresponding path program 23 times [2018-10-01 00:42:53,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:53,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:53,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:53,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:53,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:53,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:53,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:53,548 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:42:53,616 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-01 00:42:53,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:53,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:54,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:54,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-01 00:42:54,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 00:42:54,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 00:42:54,011 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:54,011 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 53 states. [2018-10-01 00:42:55,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:55,101 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2018-10-01 00:42:55,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 00:42:55,112 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2018-10-01 00:42:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:55,112 INFO L225 Difference]: With dead ends: 113 [2018-10-01 00:42:55,112 INFO L226 Difference]: Without dead ends: 75 [2018-10-01 00:42:55,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 00:42:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-01 00:42:55,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-01 00:42:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-01 00:42:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-01 00:42:55,121 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-01 00:42:55,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:55,121 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-01 00:42:55,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 00:42:55,121 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-01 00:42:55,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-01 00:42:55,122 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:55,122 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-01 00:42:55,122 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:55,122 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1247455519, now seen corresponding path program 24 times [2018-10-01 00:42:55,122 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:55,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:55,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:55,123 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:55,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:55,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:55,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:55,553 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:42:55,640 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2018-10-01 00:42:55,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:42:55,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:56,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:56,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 53 [2018-10-01 00:42:56,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 00:42:56,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 00:42:56,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:56,093 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 54 states. [2018-10-01 00:42:57,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:57,450 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2018-10-01 00:42:57,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 00:42:57,450 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 74 [2018-10-01 00:42:57,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:57,451 INFO L225 Difference]: With dead ends: 115 [2018-10-01 00:42:57,451 INFO L226 Difference]: Without dead ends: 77 [2018-10-01 00:42:57,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 00:42:57,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-01 00:42:57,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-01 00:42:57,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-01 00:42:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-01 00:42:57,458 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-01 00:42:57,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:57,458 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-01 00:42:57,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 00:42:57,458 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-01 00:42:57,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-01 00:42:57,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:57,459 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-01 00:42:57,459 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:57,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:57,460 INFO L82 PathProgramCache]: Analyzing trace with hash 494741787, now seen corresponding path program 25 times [2018-10-01 00:42:57,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:57,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:57,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:57,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:42:57,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:57,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:42:57,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:42:57,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:42:57,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:42:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:42:58,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:42:58,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-01 00:42:58,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 00:42:58,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 00:42:58,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:42:58,573 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-01 00:42:59,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:42:59,921 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2018-10-01 00:42:59,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 00:42:59,922 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-01 00:42:59,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:42:59,923 INFO L225 Difference]: With dead ends: 84 [2018-10-01 00:42:59,923 INFO L226 Difference]: Without dead ends: 82 [2018-10-01 00:42:59,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 00:42:59,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-01 00:42:59,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2018-10-01 00:42:59,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-01 00:42:59,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-01 00:42:59,931 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 76 [2018-10-01 00:42:59,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:42:59,931 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-01 00:42:59,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 00:42:59,931 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-01 00:42:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-01 00:42:59,931 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:42:59,931 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-01 00:42:59,932 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:42:59,932 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:42:59,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1564313103, now seen corresponding path program 26 times [2018-10-01 00:42:59,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:42:59,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:42:59,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:59,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:42:59,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:42:59,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:00,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:00,376 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 [2018-10-01 00:43:00,384 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:43:00,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:43:00,460 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:00,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:01,122 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 378 proven. 342 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:43:01,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:01,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 57 [2018-10-01 00:43:01,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 00:43:01,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 00:43:01,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:01,144 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 58 states. [2018-10-01 00:43:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:02,501 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2018-10-01 00:43:02,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 00:43:02,501 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 80 [2018-10-01 00:43:02,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:02,502 INFO L225 Difference]: With dead ends: 125 [2018-10-01 00:43:02,502 INFO L226 Difference]: Without dead ends: 83 [2018-10-01 00:43:02,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 00:43:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-01 00:43:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-01 00:43:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-01 00:43:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-01 00:43:02,513 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-01 00:43:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:02,513 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-01 00:43:02,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 00:43:02,513 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-01 00:43:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-01 00:43:02,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:02,514 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-01 00:43:02,514 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:02,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:02,514 INFO L82 PathProgramCache]: Analyzing trace with hash 417798411, now seen corresponding path program 27 times [2018-10-01 00:43:02,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:02,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:02,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:02,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:02,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:03,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:03,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:43:03,096 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:43:03,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2018-10-01 00:43:03,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:03,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:03,894 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:03,894 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 59 [2018-10-01 00:43:03,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 00:43:03,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 00:43:03,895 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:03,895 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 60 states. [2018-10-01 00:43:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:05,368 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2018-10-01 00:43:05,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 00:43:05,368 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 82 [2018-10-01 00:43:05,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:05,369 INFO L225 Difference]: With dead ends: 127 [2018-10-01 00:43:05,369 INFO L226 Difference]: Without dead ends: 85 [2018-10-01 00:43:05,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-10-01 00:43:05,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-01 00:43:05,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-01 00:43:05,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-01 00:43:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-01 00:43:05,379 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-01 00:43:05,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:05,380 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-01 00:43:05,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 00:43:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-01 00:43:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-01 00:43:05,380 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:05,381 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-01 00:43:05,381 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:05,381 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:05,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1871192825, now seen corresponding path program 28 times [2018-10-01 00:43:05,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:05,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:05,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:05,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:05,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:06,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:06,281 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 [2018-10-01 00:43:06,299 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:43:06,363 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:43:06,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:06,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:07,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:07,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-01 00:43:07,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 00:43:07,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 00:43:07,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:07,640 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-01 00:43:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:08,645 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-01 00:43:08,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 00:43:08,646 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-01 00:43:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:08,646 INFO L225 Difference]: With dead ends: 92 [2018-10-01 00:43:08,646 INFO L226 Difference]: Without dead ends: 90 [2018-10-01 00:43:08,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-10-01 00:43:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-01 00:43:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2018-10-01 00:43:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-01 00:43:08,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-01 00:43:08,656 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2018-10-01 00:43:08,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:08,656 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-01 00:43:08,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 00:43:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-01 00:43:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-01 00:43:08,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:08,657 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-01 00:43:08,657 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:08,657 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:08,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1432067077, now seen corresponding path program 29 times [2018-10-01 00:43:08,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:08,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:08,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:08,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:08,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:09,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:09,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:43:09,081 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:43:09,180 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-01 00:43:09,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:09,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:09,651 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:09,673 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:09,674 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-01 00:43:09,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-01 00:43:09,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-01 00:43:09,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:09,675 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 65 states. [2018-10-01 00:43:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:11,154 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2018-10-01 00:43:11,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 00:43:11,154 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 88 [2018-10-01 00:43:11,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:11,155 INFO L225 Difference]: With dead ends: 137 [2018-10-01 00:43:11,155 INFO L226 Difference]: Without dead ends: 91 [2018-10-01 00:43:11,156 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 00:43:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-01 00:43:11,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-01 00:43:11,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-01 00:43:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-01 00:43:11,163 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-01 00:43:11,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:11,164 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-01 00:43:11,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-01 00:43:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-01 00:43:11,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 00:43:11,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:11,164 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-01 00:43:11,165 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:11,165 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:11,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1476838665, now seen corresponding path program 30 times [2018-10-01 00:43:11,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:11,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:11,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:11,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:11,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:11,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:11,930 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 [2018-10-01 00:43:11,937 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:43:12,023 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-01 00:43:12,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:12,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:12,493 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:12,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:12,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 65 [2018-10-01 00:43:12,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-01 00:43:12,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-01 00:43:12,514 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:12,515 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 66 states. [2018-10-01 00:43:14,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:14,233 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2018-10-01 00:43:14,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 00:43:14,234 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 90 [2018-10-01 00:43:14,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:14,234 INFO L225 Difference]: With dead ends: 139 [2018-10-01 00:43:14,234 INFO L226 Difference]: Without dead ends: 93 [2018-10-01 00:43:14,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 00:43:14,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-01 00:43:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-01 00:43:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-01 00:43:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-01 00:43:14,243 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-01 00:43:14,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:14,244 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-01 00:43:14,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-01 00:43:14,244 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-01 00:43:14,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-01 00:43:14,244 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:14,244 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-01 00:43:14,244 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:14,244 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:14,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1552661773, now seen corresponding path program 31 times [2018-10-01 00:43:14,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:14,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:14,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:14,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:14,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:14,609 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:14,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:14,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:43:14,617 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:43:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:14,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:14,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:14,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-01 00:43:14,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 00:43:14,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 00:43:14,887 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:14,887 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-01 00:43:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:15,847 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2018-10-01 00:43:15,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 00:43:15,848 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-01 00:43:15,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:15,849 INFO L225 Difference]: With dead ends: 100 [2018-10-01 00:43:15,849 INFO L226 Difference]: Without dead ends: 98 [2018-10-01 00:43:15,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:43:15,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-01 00:43:15,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2018-10-01 00:43:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-01 00:43:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-01 00:43:15,859 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2018-10-01 00:43:15,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:15,859 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-01 00:43:15,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 00:43:15,859 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-01 00:43:15,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-01 00:43:15,859 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:15,860 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-01 00:43:15,860 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:15,860 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2078536679, now seen corresponding path program 32 times [2018-10-01 00:43:15,860 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:15,860 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:15,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:15,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:43:15,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:16,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:16,460 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 [2018-10-01 00:43:16,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:43:16,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:43:16,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:16,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 550 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:43:17,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:17,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 69 [2018-10-01 00:43:17,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-01 00:43:17,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-01 00:43:17,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:17,069 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 70 states. [2018-10-01 00:43:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:19,099 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2018-10-01 00:43:19,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 00:43:19,099 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 96 [2018-10-01 00:43:19,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:19,100 INFO L225 Difference]: With dead ends: 149 [2018-10-01 00:43:19,100 INFO L226 Difference]: Without dead ends: 99 [2018-10-01 00:43:19,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-10-01 00:43:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-01 00:43:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-01 00:43:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-01 00:43:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-01 00:43:19,112 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-01 00:43:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:19,113 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-01 00:43:19,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-01 00:43:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-01 00:43:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-01 00:43:19,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:19,113 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-01 00:43:19,114 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:19,114 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:19,114 INFO L82 PathProgramCache]: Analyzing trace with hash 224399075, now seen corresponding path program 33 times [2018-10-01 00:43:19,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:19,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:19,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:19,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:19,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:19,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:19,572 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 [2018-10-01 00:43:19,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:43:19,671 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-01 00:43:19,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:19,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:20,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:20,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 71 [2018-10-01 00:43:20,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-01 00:43:20,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-01 00:43:20,193 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:20,193 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 72 states. [2018-10-01 00:43:22,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:22,583 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2018-10-01 00:43:22,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 00:43:22,583 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 98 [2018-10-01 00:43:22,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:22,583 INFO L225 Difference]: With dead ends: 151 [2018-10-01 00:43:22,584 INFO L226 Difference]: Without dead ends: 101 [2018-10-01 00:43:22,584 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 00:43:22,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-01 00:43:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-01 00:43:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-01 00:43:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-01 00:43:22,593 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-01 00:43:22,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:22,593 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-01 00:43:22,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-01 00:43:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-01 00:43:22,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-01 00:43:22,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:22,594 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-01 00:43:22,594 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:22,594 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:22,594 INFO L82 PathProgramCache]: Analyzing trace with hash 809589471, now seen corresponding path program 34 times [2018-10-01 00:43:22,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:22,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:22,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:22,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:22,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:22,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:22,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:43:22,917 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:43:22,995 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:43:22,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:22,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:23,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:23,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-01 00:43:23,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 00:43:23,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 00:43:23,192 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:23,192 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-01 00:43:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:24,420 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2018-10-01 00:43:24,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 00:43:24,420 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-01 00:43:24,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:24,421 INFO L225 Difference]: With dead ends: 108 [2018-10-01 00:43:24,421 INFO L226 Difference]: Without dead ends: 106 [2018-10-01 00:43:24,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:43:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-01 00:43:24,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2018-10-01 00:43:24,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-01 00:43:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-01 00:43:24,432 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2018-10-01 00:43:24,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:24,432 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-01 00:43:24,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 00:43:24,432 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-01 00:43:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-01 00:43:24,433 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:24,433 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-01 00:43:24,433 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:24,433 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:24,433 INFO L82 PathProgramCache]: Analyzing trace with hash 726349267, now seen corresponding path program 35 times [2018-10-01 00:43:24,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:24,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:24,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:24,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:24,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:25,077 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:25,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:43:25,085 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:43:25,188 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-01 00:43:25,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:25,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:25,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:25,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-01 00:43:25,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 00:43:25,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 00:43:25,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:25,828 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 77 states. [2018-10-01 00:43:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:27,701 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2018-10-01 00:43:27,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 00:43:27,701 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 104 [2018-10-01 00:43:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:27,702 INFO L225 Difference]: With dead ends: 161 [2018-10-01 00:43:27,702 INFO L226 Difference]: Without dead ends: 107 [2018-10-01 00:43:27,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-10-01 00:43:27,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-01 00:43:27,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-01 00:43:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-01 00:43:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-01 00:43:27,713 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-01 00:43:27,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:27,713 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-01 00:43:27,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-01 00:43:27,714 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-01 00:43:27,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-01 00:43:27,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:27,714 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-01 00:43:27,715 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:27,715 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:27,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1735038159, now seen corresponding path program 36 times [2018-10-01 00:43:27,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:27,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:27,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:27,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:27,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:28,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:28,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:43:28,408 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:43:28,511 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-01 00:43:28,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:28,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:29,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:29,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:29,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 77 [2018-10-01 00:43:29,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-01 00:43:29,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-01 00:43:29,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:29,308 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 78 states. [2018-10-01 00:43:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:31,566 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2018-10-01 00:43:31,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 00:43:31,566 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 106 [2018-10-01 00:43:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:31,567 INFO L225 Difference]: With dead ends: 163 [2018-10-01 00:43:31,567 INFO L226 Difference]: Without dead ends: 109 [2018-10-01 00:43:31,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 00:43:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-01 00:43:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-01 00:43:31,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-01 00:43:31,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-01 00:43:31,579 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-01 00:43:31,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:31,580 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-01 00:43:31,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-01 00:43:31,580 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-01 00:43:31,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-01 00:43:31,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:31,581 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-01 00:43:31,581 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:31,581 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:31,581 INFO L82 PathProgramCache]: Analyzing trace with hash 422454475, now seen corresponding path program 37 times [2018-10-01 00:43:31,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:31,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:31,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:31,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:31,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:32,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:32,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:32,449 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 [2018-10-01 00:43:32,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:43:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:32,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:32,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:32,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-01 00:43:32,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 00:43:32,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 00:43:32,833 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:32,833 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-01 00:43:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:34,134 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-01 00:43:34,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 00:43:34,134 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-01 00:43:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:34,135 INFO L225 Difference]: With dead ends: 116 [2018-10-01 00:43:34,135 INFO L226 Difference]: Without dead ends: 114 [2018-10-01 00:43:34,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 00:43:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-01 00:43:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2018-10-01 00:43:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-01 00:43:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-01 00:43:34,151 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 108 [2018-10-01 00:43:34,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:34,152 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-01 00:43:34,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 00:43:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-01 00:43:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-01 00:43:34,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:34,153 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-01 00:43:34,153 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:34,153 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash -609670721, now seen corresponding path program 38 times [2018-10-01 00:43:34,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:34,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:34,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:34,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:43:34,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:34,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:34,770 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 [2018-10-01 00:43:34,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:43:34,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:43:34,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:34,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 754 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:43:35,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:35,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 81 [2018-10-01 00:43:35,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-01 00:43:35,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-01 00:43:35,612 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:35,612 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 82 states. [2018-10-01 00:43:37,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:37,669 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2018-10-01 00:43:37,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 00:43:37,669 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 112 [2018-10-01 00:43:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:37,670 INFO L225 Difference]: With dead ends: 173 [2018-10-01 00:43:37,670 INFO L226 Difference]: Without dead ends: 115 [2018-10-01 00:43:37,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-10-01 00:43:37,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-01 00:43:37,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-01 00:43:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-01 00:43:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-01 00:43:37,681 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-01 00:43:37,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:37,681 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-01 00:43:37,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-01 00:43:37,681 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-01 00:43:37,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-01 00:43:37,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:37,682 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-01 00:43:37,682 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:37,682 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:37,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1662530373, now seen corresponding path program 39 times [2018-10-01 00:43:37,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:37,682 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:37,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:37,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:37,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:38,868 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:38,868 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 [2018-10-01 00:43:38,876 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:43:38,988 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-01 00:43:38,988 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:38,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:39,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:39,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 83 [2018-10-01 00:43:39,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-01 00:43:39,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-01 00:43:39,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:39,805 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 84 states. [2018-10-01 00:43:41,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:41,825 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2018-10-01 00:43:41,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 00:43:41,825 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 114 [2018-10-01 00:43:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:41,826 INFO L225 Difference]: With dead ends: 175 [2018-10-01 00:43:41,826 INFO L226 Difference]: Without dead ends: 117 [2018-10-01 00:43:41,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-10-01 00:43:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-01 00:43:41,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-01 00:43:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-01 00:43:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-01 00:43:41,839 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-01 00:43:41,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:41,839 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-01 00:43:41,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-01 00:43:41,839 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-01 00:43:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-01 00:43:41,840 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:41,840 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-01 00:43:41,840 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:41,840 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:41,840 INFO L82 PathProgramCache]: Analyzing trace with hash 151625911, now seen corresponding path program 40 times [2018-10-01 00:43:41,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:41,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:41,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:41,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:41,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:42,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:42,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:43:42,421 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:43:42,513 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:43:42,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:42,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:44,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:44,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-01 00:43:44,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 00:43:44,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 00:43:44,046 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:44,046 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-01 00:43:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:45,492 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2018-10-01 00:43:45,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 00:43:45,493 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-01 00:43:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:45,494 INFO L225 Difference]: With dead ends: 124 [2018-10-01 00:43:45,494 INFO L226 Difference]: Without dead ends: 122 [2018-10-01 00:43:45,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time [2018-10-01 00:43:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-10-01 00:43:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2018-10-01 00:43:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-01 00:43:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-01 00:43:45,511 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2018-10-01 00:43:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:45,511 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-01 00:43:45,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 00:43:45,511 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-01 00:43:45,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-01 00:43:45,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:45,512 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-01 00:43:45,512 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:45,513 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash 944557995, now seen corresponding path program 41 times [2018-10-01 00:43:45,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:45,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:45,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:45,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:45,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:46,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:46,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:43:46,141 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:43:46,271 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-01 00:43:46,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:46,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:46,955 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:46,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2018-10-01 00:43:46,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-01 00:43:46,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-01 00:43:46,956 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:46,957 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 89 states. [2018-10-01 00:43:49,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:49,888 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2018-10-01 00:43:49,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 00:43:49,888 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 120 [2018-10-01 00:43:49,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:49,889 INFO L225 Difference]: With dead ends: 185 [2018-10-01 00:43:49,889 INFO L226 Difference]: Without dead ends: 123 [2018-10-01 00:43:49,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 00:43:49,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-01 00:43:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-01 00:43:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-01 00:43:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-01 00:43:49,907 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-01 00:43:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:49,907 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-01 00:43:49,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-01 00:43:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-01 00:43:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-01 00:43:49,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:49,908 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-01 00:43:49,909 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:49,909 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:49,909 INFO L82 PathProgramCache]: Analyzing trace with hash 489076391, now seen corresponding path program 42 times [2018-10-01 00:43:49,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:49,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:49,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:49,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:49,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:50,867 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:50,867 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:43:50,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:43:51,002 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2018-10-01 00:43:51,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:51,007 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:51,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:51,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 89 [2018-10-01 00:43:51,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-01 00:43:51,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-01 00:43:51,891 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:51,892 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 90 states. [2018-10-01 00:43:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:54,653 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2018-10-01 00:43:54,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 00:43:54,654 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 122 [2018-10-01 00:43:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:54,654 INFO L225 Difference]: With dead ends: 187 [2018-10-01 00:43:54,655 INFO L226 Difference]: Without dead ends: 125 [2018-10-01 00:43:54,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-10-01 00:43:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-01 00:43:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-01 00:43:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-01 00:43:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-01 00:43:54,668 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-01 00:43:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:54,668 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-01 00:43:54,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-01 00:43:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-01 00:43:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-01 00:43:54,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:54,669 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-01 00:43:54,669 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:54,669 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:54,669 INFO L82 PathProgramCache]: Analyzing trace with hash 857919139, now seen corresponding path program 43 times [2018-10-01 00:43:54,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:54,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:54,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:54,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:43:54,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:55,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:55,122 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 [2018-10-01 00:43:55,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:43:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:55,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:55,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:55,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-01 00:43:55,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 00:43:55,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 00:43:55,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:55,497 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-01 00:43:56,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:43:56,886 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2018-10-01 00:43:56,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-01 00:43:56,887 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-01 00:43:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:43:56,888 INFO L225 Difference]: With dead ends: 132 [2018-10-01 00:43:56,888 INFO L226 Difference]: Without dead ends: 130 [2018-10-01 00:43:56,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:43:56,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-10-01 00:43:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2018-10-01 00:43:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-01 00:43:56,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-01 00:43:56,903 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2018-10-01 00:43:56,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:43:56,903 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-01 00:43:56,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 00:43:56,903 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-01 00:43:56,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-01 00:43:56,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:43:56,904 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-01 00:43:56,904 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:43:56,904 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:43:56,904 INFO L82 PathProgramCache]: Analyzing trace with hash 889530263, now seen corresponding path program 44 times [2018-10-01 00:43:56,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:43:56,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:43:56,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:56,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:43:56,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:43:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:43:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:43:57,491 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:43:57,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:43:57,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:43:57,595 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:43:57,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:43:57,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:43:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 990 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:43:58,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:43:58,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 93 [2018-10-01 00:43:58,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-01 00:43:58,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-01 00:43:58,548 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:43:58,548 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 94 states. [2018-10-01 00:44:01,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:01,628 INFO L93 Difference]: Finished difference Result 197 states and 199 transitions. [2018-10-01 00:44:01,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-01 00:44:01,628 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 128 [2018-10-01 00:44:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:01,629 INFO L225 Difference]: With dead ends: 197 [2018-10-01 00:44:01,629 INFO L226 Difference]: Without dead ends: 131 [2018-10-01 00:44:01,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-10-01 00:44:01,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-01 00:44:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-01 00:44:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-01 00:44:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-01 00:44:01,647 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-01 00:44:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:01,647 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-01 00:44:01,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-01 00:44:01,647 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-01 00:44:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-01 00:44:01,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:01,648 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-01 00:44:01,648 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:01,648 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:01,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1611246957, now seen corresponding path program 45 times [2018-10-01 00:44:01,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:01,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:01,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:01,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:44:01,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:02,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:02,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:44:02,494 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:44:02,657 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2018-10-01 00:44:02,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:44:02,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:03,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:03,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 95 [2018-10-01 00:44:03,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-01 00:44:03,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-01 00:44:03,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:03,535 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 96 states. [2018-10-01 00:44:06,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:06,735 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2018-10-01 00:44:06,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-01 00:44:06,736 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 130 [2018-10-01 00:44:06,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:06,736 INFO L225 Difference]: With dead ends: 199 [2018-10-01 00:44:06,736 INFO L226 Difference]: Without dead ends: 133 [2018-10-01 00:44:06,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-10-01 00:44:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-01 00:44:06,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-01 00:44:06,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-01 00:44:06,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-01 00:44:06,750 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-01 00:44:06,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:06,750 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-01 00:44:06,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-01 00:44:06,750 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-01 00:44:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-01 00:44:06,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:06,751 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-01 00:44:06,751 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:06,751 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:06,751 INFO L82 PathProgramCache]: Analyzing trace with hash 323530383, now seen corresponding path program 46 times [2018-10-01 00:44:06,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:06,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:06,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:06,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:44:06,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:07,297 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:07,297 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:44:07,305 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:44:07,412 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:44:07,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:44:07,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:07,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:07,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-01 00:44:07,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 00:44:07,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 00:44:07,791 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:07,791 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-01 00:44:09,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:09,284 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-01 00:44:09,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-01 00:44:09,284 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-01 00:44:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:09,285 INFO L225 Difference]: With dead ends: 140 [2018-10-01 00:44:09,285 INFO L226 Difference]: Without dead ends: 138 [2018-10-01 00:44:09,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 00:44:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-01 00:44:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2018-10-01 00:44:09,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-01 00:44:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-01 00:44:09,303 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 132 [2018-10-01 00:44:09,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:09,304 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-01 00:44:09,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 00:44:09,304 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-01 00:44:09,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-01 00:44:09,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:09,304 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-01 00:44:09,305 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:09,305 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:09,305 INFO L82 PathProgramCache]: Analyzing trace with hash -836685437, now seen corresponding path program 47 times [2018-10-01 00:44:09,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:09,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:09,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:09,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:44:09,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:10,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:10,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:44:10,223 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:44:10,375 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-01 00:44:10,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:44:10,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:12,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:12,106 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 100 [2018-10-01 00:44:12,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-01 00:44:12,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-01 00:44:12,107 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:12,107 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 101 states. [2018-10-01 00:44:15,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:15,454 INFO L93 Difference]: Finished difference Result 209 states and 211 transitions. [2018-10-01 00:44:15,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-01 00:44:15,454 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 136 [2018-10-01 00:44:15,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:15,455 INFO L225 Difference]: With dead ends: 209 [2018-10-01 00:44:15,455 INFO L226 Difference]: Without dead ends: 139 [2018-10-01 00:44:15,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time [2018-10-01 00:44:15,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-01 00:44:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-01 00:44:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-01 00:44:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-01 00:44:15,470 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-01 00:44:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:15,470 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-01 00:44:15,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-01 00:44:15,470 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-01 00:44:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-01 00:44:15,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:15,470 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-01 00:44:15,471 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:15,471 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:15,471 INFO L82 PathProgramCache]: Analyzing trace with hash -442130305, now seen corresponding path program 48 times [2018-10-01 00:44:15,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:15,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:15,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:15,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:44:15,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:16,386 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:16,386 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 [2018-10-01 00:44:16,393 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:44:16,542 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-01 00:44:16,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:44:16,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:17,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:17,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 101 [2018-10-01 00:44:17,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-01 00:44:17,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-01 00:44:17,362 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:17,362 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 102 states. [2018-10-01 00:44:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:20,994 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2018-10-01 00:44:20,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-01 00:44:20,994 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 138 [2018-10-01 00:44:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:20,995 INFO L225 Difference]: With dead ends: 211 [2018-10-01 00:44:20,995 INFO L226 Difference]: Without dead ends: 141 [2018-10-01 00:44:20,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-10-01 00:44:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-01 00:44:21,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-01 00:44:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-01 00:44:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-01 00:44:21,015 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-01 00:44:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:21,016 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-01 00:44:21,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-01 00:44:21,016 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-01 00:44:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-01 00:44:21,017 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:21,017 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-01 00:44:21,017 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:21,017 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:21,017 INFO L82 PathProgramCache]: Analyzing trace with hash 768229499, now seen corresponding path program 49 times [2018-10-01 00:44:21,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:21,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:21,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:21,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:44:21,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:21,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:21,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:44:21,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:44:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:21,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:22,145 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:22,146 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-01 00:44:22,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 00:44:22,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 00:44:22,146 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:22,147 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-01 00:44:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:23,769 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2018-10-01 00:44:23,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-01 00:44:23,769 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-01 00:44:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:23,771 INFO L225 Difference]: With dead ends: 148 [2018-10-01 00:44:23,771 INFO L226 Difference]: Without dead ends: 146 [2018-10-01 00:44:23,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 00:44:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-01 00:44:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2018-10-01 00:44:23,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-01 00:44:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-01 00:44:23,787 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2018-10-01 00:44:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:23,787 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-01 00:44:23,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 00:44:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-01 00:44:23,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-01 00:44:23,788 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:23,788 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-01 00:44:23,789 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:23,789 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:23,789 INFO L82 PathProgramCache]: Analyzing trace with hash -932188817, now seen corresponding path program 50 times [2018-10-01 00:44:23,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:23,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:23,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:23,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:44:23,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:24,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:24,813 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 [2018-10-01 00:44:24,822 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:44:24,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:44:24,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:44:24,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1258 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:44:25,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:25,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 105 [2018-10-01 00:44:25,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-01 00:44:25,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-01 00:44:25,926 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:25,926 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 106 states. [2018-10-01 00:44:29,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:29,399 INFO L93 Difference]: Finished difference Result 221 states and 223 transitions. [2018-10-01 00:44:29,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-01 00:44:29,399 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 144 [2018-10-01 00:44:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:29,400 INFO L225 Difference]: With dead ends: 221 [2018-10-01 00:44:29,400 INFO L226 Difference]: Without dead ends: 147 [2018-10-01 00:44:29,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time [2018-10-01 00:44:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-01 00:44:29,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-01 00:44:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-01 00:44:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-01 00:44:29,416 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-01 00:44:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:29,416 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-01 00:44:29,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-01 00:44:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-01 00:44:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-01 00:44:29,417 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:29,417 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-01 00:44:29,417 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:29,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:29,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1996726379, now seen corresponding path program 51 times [2018-10-01 00:44:29,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:29,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:29,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:29,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:44:29,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:30,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:30,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:30,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:44:30,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:44:30,323 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-01 00:44:30,323 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:44:30,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:31,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:31,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 107 [2018-10-01 00:44:31,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-01 00:44:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-01 00:44:31,401 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:31,401 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 108 states. [2018-10-01 00:44:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:35,125 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2018-10-01 00:44:35,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-01 00:44:35,125 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 146 [2018-10-01 00:44:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:35,126 INFO L225 Difference]: With dead ends: 223 [2018-10-01 00:44:35,126 INFO L226 Difference]: Without dead ends: 149 [2018-10-01 00:44:35,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-10-01 00:44:35,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-01 00:44:35,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-01 00:44:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-01 00:44:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-01 00:44:35,142 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-01 00:44:35,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:35,142 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-01 00:44:35,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-01 00:44:35,142 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-01 00:44:35,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-01 00:44:35,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:35,143 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-01 00:44:35,143 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:35,143 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:35,143 INFO L82 PathProgramCache]: Analyzing trace with hash -814316441, now seen corresponding path program 52 times [2018-10-01 00:44:35,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:35,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:35,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:35,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:44:35,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:35,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:35,678 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 [2018-10-01 00:44:35,685 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:44:35,802 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:44:35,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:44:35,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:36,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:36,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-01 00:44:36,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 00:44:36,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 00:44:36,092 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:36,092 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-01 00:44:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:37,830 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2018-10-01 00:44:37,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-01 00:44:37,830 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-01 00:44:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:37,832 INFO L225 Difference]: With dead ends: 156 [2018-10-01 00:44:37,832 INFO L226 Difference]: Without dead ends: 154 [2018-10-01 00:44:37,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 00:44:37,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-01 00:44:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2018-10-01 00:44:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-01 00:44:37,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-01 00:44:37,852 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 148 [2018-10-01 00:44:37,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:37,853 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-01 00:44:37,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 00:44:37,853 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-01 00:44:37,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-01 00:44:37,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:37,854 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-01 00:44:37,854 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:37,854 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:37,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1900043099, now seen corresponding path program 53 times [2018-10-01 00:44:37,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:37,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:37,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:37,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:44:37,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:38,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:38,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:38,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:44:38,646 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:44:38,855 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2018-10-01 00:44:38,856 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:44:38,862 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:39,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:39,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 112 [2018-10-01 00:44:39,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-01 00:44:39,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-01 00:44:39,784 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:39,784 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 113 states. [2018-10-01 00:44:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:43,757 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2018-10-01 00:44:43,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-01 00:44:43,758 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 152 [2018-10-01 00:44:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:43,759 INFO L225 Difference]: With dead ends: 233 [2018-10-01 00:44:43,759 INFO L226 Difference]: Without dead ends: 155 [2018-10-01 00:44:43,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-10-01 00:44:43,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-01 00:44:43,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-01 00:44:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-01 00:44:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-01 00:44:43,778 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-01 00:44:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:43,778 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-01 00:44:43,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-01 00:44:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-01 00:44:43,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-01 00:44:43,778 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:43,779 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-01 00:44:43,779 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:43,779 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:43,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1700745815, now seen corresponding path program 54 times [2018-10-01 00:44:43,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:43,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:43,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:43,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:44:43,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:44,513 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:44,513 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 [2018-10-01 00:44:44,520 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:44:44,693 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-01 00:44:44,693 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:44:44,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:45,699 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:45,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 113 [2018-10-01 00:44:45,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-01 00:44:45,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-01 00:44:45,701 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:45,701 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 114 states. [2018-10-01 00:44:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:50,032 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2018-10-01 00:44:50,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-01 00:44:50,032 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 154 [2018-10-01 00:44:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:50,033 INFO L225 Difference]: With dead ends: 235 [2018-10-01 00:44:50,033 INFO L226 Difference]: Without dead ends: 157 [2018-10-01 00:44:50,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-10-01 00:44:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-01 00:44:50,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-01 00:44:50,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-01 00:44:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-01 00:44:50,050 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-01 00:44:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:50,051 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-01 00:44:50,051 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-01 00:44:50,051 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-01 00:44:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-01 00:44:50,051 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:50,052 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-01 00:44:50,052 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:50,052 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:50,052 INFO L82 PathProgramCache]: Analyzing trace with hash -845383085, now seen corresponding path program 55 times [2018-10-01 00:44:50,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:50,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:50,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:50,053 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:44:50,053 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:50,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:50,450 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 [2018-10-01 00:44:50,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:44:50,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:50,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:51,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:51,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-01 00:44:51,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-01 00:44:51,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-01 00:44:51,206 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:51,206 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-01 00:44:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:53,054 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-01 00:44:53,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-01 00:44:53,055 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-01 00:44:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:53,056 INFO L225 Difference]: With dead ends: 164 [2018-10-01 00:44:53,056 INFO L226 Difference]: Without dead ends: 162 [2018-10-01 00:44:53,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 00:44:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-10-01 00:44:53,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2018-10-01 00:44:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-01 00:44:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-01 00:44:53,075 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 156 [2018-10-01 00:44:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:53,075 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-01 00:44:53,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-01 00:44:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-01 00:44:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-01 00:44:53,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:53,076 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-01 00:44:53,076 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:53,077 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:53,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1583446855, now seen corresponding path program 56 times [2018-10-01 00:44:53,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:53,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:53,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:53,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:44:53,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:44:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:44:53,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:44:53,884 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 [2018-10-01 00:44:53,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:44:54,012 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:44:54,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:44:54,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:44:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1558 proven. 1482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:44:55,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:44:55,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78] total 117 [2018-10-01 00:44:55,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-01 00:44:55,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-01 00:44:55,031 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:44:55,031 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 118 states. [2018-10-01 00:44:59,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:44:59,502 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2018-10-01 00:44:59,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-01 00:44:59,503 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 160 [2018-10-01 00:44:59,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:44:59,503 INFO L225 Difference]: With dead ends: 245 [2018-10-01 00:44:59,503 INFO L226 Difference]: Without dead ends: 163 [2018-10-01 00:44:59,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time [2018-10-01 00:44:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-01 00:44:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-01 00:44:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-01 00:44:59,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-01 00:44:59,523 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-01 00:44:59,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:44:59,523 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-01 00:44:59,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-01 00:44:59,523 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-01 00:44:59,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-01 00:44:59,524 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:44:59,524 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-01 00:44:59,524 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:44:59,524 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:44:59,524 INFO L82 PathProgramCache]: Analyzing trace with hash 176666179, now seen corresponding path program 57 times [2018-10-01 00:44:59,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:44:59,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:44:59,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:59,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:44:59,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:44:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:45:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:00,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:45:00,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:45:00,301 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:45:00,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-01 00:45:00,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:45:00,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:45:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:01,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:45:01,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 119 [2018-10-01 00:45:01,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-10-01 00:45:01,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-10-01 00:45:01,741 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:45:01,741 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 120 states. [2018-10-01 00:45:06,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:45:06,222 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2018-10-01 00:45:06,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-01 00:45:06,222 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 162 [2018-10-01 00:45:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:45:06,223 INFO L225 Difference]: With dead ends: 247 [2018-10-01 00:45:06,223 INFO L226 Difference]: Without dead ends: 165 [2018-10-01 00:45:06,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time [2018-10-01 00:45:06,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-01 00:45:06,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-01 00:45:06,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-01 00:45:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-01 00:45:06,242 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-01 00:45:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:45:06,243 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-01 00:45:06,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-10-01 00:45:06,243 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-01 00:45:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-01 00:45:06,243 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:45:06,243 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-01 00:45:06,244 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:45:06,244 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:45:06,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1175134783, now seen corresponding path program 58 times [2018-10-01 00:45:06,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:45:06,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:45:06,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:06,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:45:06,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:45:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:06,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:45:06,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:45:06,807 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:45:06,939 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:45:06,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:45:06,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:45:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:07,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:45:07,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-01 00:45:07,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 00:45:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 00:45:07,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:45:07,244 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-10-01 00:45:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:45:09,066 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2018-10-01 00:45:09,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-01 00:45:09,067 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-10-01 00:45:09,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:45:09,068 INFO L225 Difference]: With dead ends: 172 [2018-10-01 00:45:09,068 INFO L226 Difference]: Without dead ends: 170 [2018-10-01 00:45:09,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 00:45:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-10-01 00:45:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2018-10-01 00:45:09,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-01 00:45:09,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-01 00:45:09,099 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2018-10-01 00:45:09,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:45:09,099 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-01 00:45:09,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 00:45:09,099 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-01 00:45:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-01 00:45:09,100 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:45:09,100 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-10-01 00:45:09,100 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:45:09,100 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:45:09,101 INFO L82 PathProgramCache]: Analyzing trace with hash 773999923, now seen corresponding path program 59 times [2018-10-01 00:45:09,101 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:45:09,101 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:45:09,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:09,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:45:09,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:45:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:09,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:45:09,883 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 [2018-10-01 00:45:09,890 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:45:10,087 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-01 00:45:10,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:45:10,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:45:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:11,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:45:11,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 124 [2018-10-01 00:45:11,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-10-01 00:45:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-10-01 00:45:11,154 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:45:11,154 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 125 states. [2018-10-01 00:45:16,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:45:16,062 INFO L93 Difference]: Finished difference Result 257 states and 259 transitions. [2018-10-01 00:45:16,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-01 00:45:16,062 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 168 [2018-10-01 00:45:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:45:16,063 INFO L225 Difference]: With dead ends: 257 [2018-10-01 00:45:16,063 INFO L226 Difference]: Without dead ends: 171 [2018-10-01 00:45:16,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time [2018-10-01 00:45:16,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-01 00:45:16,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-01 00:45:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-01 00:45:16,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-01 00:45:16,093 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-10-01 00:45:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:45:16,093 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-01 00:45:16,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-10-01 00:45:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-01 00:45:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-01 00:45:16,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:45:16,094 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-01 00:45:16,094 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:45:16,095 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:45:16,095 INFO L82 PathProgramCache]: Analyzing trace with hash -926168017, now seen corresponding path program 60 times [2018-10-01 00:45:16,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:45:16,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:45:16,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:16,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:45:16,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:45:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:17,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:45:17,145 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:45:17,154 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:45:17,358 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2018-10-01 00:45:17,359 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:45:17,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:45:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:18,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:45:18,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 125 [2018-10-01 00:45:18,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-01 00:45:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-01 00:45:18,559 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:45:18,559 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 126 states. [2018-10-01 00:45:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:45:23,501 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2018-10-01 00:45:23,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-01 00:45:23,501 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 170 [2018-10-01 00:45:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:45:23,502 INFO L225 Difference]: With dead ends: 259 [2018-10-01 00:45:23,502 INFO L226 Difference]: Without dead ends: 173 [2018-10-01 00:45:23,503 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-10-01 00:45:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-01 00:45:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-01 00:45:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-01 00:45:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-01 00:45:23,529 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-10-01 00:45:23,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:45:23,529 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-01 00:45:23,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-01 00:45:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-01 00:45:23,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-01 00:45:23,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:45:23,531 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-10-01 00:45:23,531 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:45:23,531 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:45:23,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1594981419, now seen corresponding path program 61 times [2018-10-01 00:45:23,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:45:23,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:45:23,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:23,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:45:23,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:45:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:24,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:45:24,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:45:24,021 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:45:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:45:24,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:45:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:24,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:45:24,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-01 00:45:24,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 00:45:24,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 00:45:24,549 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:45:24,549 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-10-01 00:45:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:45:26,492 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2018-10-01 00:45:26,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-01 00:45:26,493 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-10-01 00:45:26,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:45:26,494 INFO L225 Difference]: With dead ends: 180 [2018-10-01 00:45:26,494 INFO L226 Difference]: Without dead ends: 178 [2018-10-01 00:45:26,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 00:45:26,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-10-01 00:45:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2018-10-01 00:45:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-01 00:45:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-10-01 00:45:26,525 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 172 [2018-10-01 00:45:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:45:26,526 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-10-01 00:45:26,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 00:45:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-10-01 00:45:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-01 00:45:26,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:45:26,526 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-10-01 00:45:26,527 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:45:26,527 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:45:26,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1196544287, now seen corresponding path program 62 times [2018-10-01 00:45:26,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:45:26,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:45:26,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:26,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:45:26,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:45:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:27,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:45:27,612 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 [2018-10-01 00:45:27,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:45:27,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:45:27,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:45:27,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:45:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1890 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:45:28,978 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:45:28,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 129 [2018-10-01 00:45:28,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-01 00:45:28,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-01 00:45:28,979 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:45:28,980 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 130 states. [2018-10-01 00:45:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:45:34,227 INFO L93 Difference]: Finished difference Result 269 states and 271 transitions. [2018-10-01 00:45:34,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-01 00:45:34,227 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 176 [2018-10-01 00:45:34,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:45:34,228 INFO L225 Difference]: With dead ends: 269 [2018-10-01 00:45:34,228 INFO L226 Difference]: Without dead ends: 179 [2018-10-01 00:45:34,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-10-01 00:45:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-01 00:45:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-01 00:45:34,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-01 00:45:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-01 00:45:34,251 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-10-01 00:45:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:45:34,251 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-01 00:45:34,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-01 00:45:34,252 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-01 00:45:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-01 00:45:34,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:45:34,253 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-10-01 00:45:34,253 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:45:34,253 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:45:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash -889547749, now seen corresponding path program 63 times [2018-10-01 00:45:34,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:45:34,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:45:34,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:34,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:45:34,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:45:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:35,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:45:35,130 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 [2018-10-01 00:45:35,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:45:35,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2018-10-01 00:45:35,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:45:35,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:45:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:36,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:45:36,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 131 [2018-10-01 00:45:36,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-10-01 00:45:36,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-10-01 00:45:36,492 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:45:36,492 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 132 states. [2018-10-01 00:45:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:45:41,897 INFO L93 Difference]: Finished difference Result 271 states and 273 transitions. [2018-10-01 00:45:41,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-01 00:45:41,897 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 178 [2018-10-01 00:45:41,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:45:41,898 INFO L225 Difference]: With dead ends: 271 [2018-10-01 00:45:41,898 INFO L226 Difference]: Without dead ends: 181 [2018-10-01 00:45:41,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time [2018-10-01 00:45:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-01 00:45:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-01 00:45:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-01 00:45:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-10-01 00:45:41,921 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-10-01 00:45:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:45:41,921 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-10-01 00:45:41,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-10-01 00:45:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-10-01 00:45:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-01 00:45:41,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:45:41,922 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-10-01 00:45:41,922 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:45:41,922 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:45:41,922 INFO L82 PathProgramCache]: Analyzing trace with hash 125732887, now seen corresponding path program 64 times [2018-10-01 00:45:41,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:45:41,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:45:41,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:41,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:45:41,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:45:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:42,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:45:42,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:45:42,558 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:45:42,698 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:45:42,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:45:42,705 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:45:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:43,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:45:43,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-10-01 00:45:43,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 00:45:43,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 00:45:43,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:45:43,054 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-10-01 00:45:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:45:45,052 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-01 00:45:45,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-01 00:45:45,052 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-10-01 00:45:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:45:45,053 INFO L225 Difference]: With dead ends: 188 [2018-10-01 00:45:45,053 INFO L226 Difference]: Without dead ends: 186 [2018-10-01 00:45:45,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 00:45:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-01 00:45:45,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2018-10-01 00:45:45,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-01 00:45:45,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-10-01 00:45:45,081 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 180 [2018-10-01 00:45:45,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:45:45,082 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-10-01 00:45:45,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 00:45:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-10-01 00:45:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-01 00:45:45,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:45:45,083 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-10-01 00:45:45,083 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:45:45,083 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:45:45,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1723922677, now seen corresponding path program 65 times [2018-10-01 00:45:45,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:45:45,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:45:45,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:45,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:45:45,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:45:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:46,119 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:45:46,119 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 [2018-10-01 00:45:46,140 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:45:46,371 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-01 00:45:46,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:45:46,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:45:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:47,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:45:47,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 136 [2018-10-01 00:45:47,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-10-01 00:45:47,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-10-01 00:45:47,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:45:47,769 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 137 states. [2018-10-01 00:45:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:45:51,827 INFO L93 Difference]: Finished difference Result 281 states and 283 transitions. [2018-10-01 00:45:51,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-01 00:45:51,828 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 184 [2018-10-01 00:45:51,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:45:51,828 INFO L225 Difference]: With dead ends: 281 [2018-10-01 00:45:51,829 INFO L226 Difference]: Without dead ends: 187 [2018-10-01 00:45:51,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time [2018-10-01 00:45:51,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-01 00:45:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-01 00:45:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-01 00:45:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-10-01 00:45:51,854 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-10-01 00:45:51,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:45:51,854 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-10-01 00:45:51,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-10-01 00:45:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-10-01 00:45:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-01 00:45:51,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:45:51,855 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-10-01 00:45:51,856 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:45:51,856 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:45:51,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1000141305, now seen corresponding path program 66 times [2018-10-01 00:45:51,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:45:51,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:45:51,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:51,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:45:51,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:45:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:45:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:53,044 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:45:53,044 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:45:53,050 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:45:53,291 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-01 00:45:53,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:45:53,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:45:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:45:54,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:45:54,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 137 [2018-10-01 00:45:54,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-01 00:45:54,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-01 00:45:54,524 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:45:54,524 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 138 states. [2018-10-01 00:46:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:46:00,417 INFO L93 Difference]: Finished difference Result 283 states and 285 transitions. [2018-10-01 00:46:00,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-01 00:46:00,417 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 186 [2018-10-01 00:46:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:46:00,418 INFO L225 Difference]: With dead ends: 283 [2018-10-01 00:46:00,418 INFO L226 Difference]: Without dead ends: 189 [2018-10-01 00:46:00,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time [2018-10-01 00:46:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-01 00:46:00,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-01 00:46:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-01 00:46:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-10-01 00:46:00,447 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-10-01 00:46:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:46:00,448 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-10-01 00:46:00,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-01 00:46:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-10-01 00:46:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-01 00:46:00,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:46:00,449 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-10-01 00:46:00,449 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:46:00,449 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:46:00,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1230944765, now seen corresponding path program 67 times [2018-10-01 00:46:00,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:46:00,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:46:00,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:00,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:46:00,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:01,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:46:01,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:46:01,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:46:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:01,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:46:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:01,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:46:01,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-10-01 00:46:01,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-01 00:46:01,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-01 00:46:01,708 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:46:01,709 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-10-01 00:46:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:46:04,015 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2018-10-01 00:46:04,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-01 00:46:04,016 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-10-01 00:46:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:46:04,017 INFO L225 Difference]: With dead ends: 196 [2018-10-01 00:46:04,017 INFO L226 Difference]: Without dead ends: 194 [2018-10-01 00:46:04,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 00:46:04,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-01 00:46:04,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2018-10-01 00:46:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-01 00:46:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-10-01 00:46:04,044 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 188 [2018-10-01 00:46:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:46:04,044 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-10-01 00:46:04,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-01 00:46:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-10-01 00:46:04,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-01 00:46:04,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:46:04,045 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-10-01 00:46:04,046 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:46:04,046 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:46:04,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1538846455, now seen corresponding path program 68 times [2018-10-01 00:46:04,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:46:04,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:46:04,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:04,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:46:04,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:05,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:46:05,001 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 [2018-10-01 00:46:05,008 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:46:05,155 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:46:05,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:46:05,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:46:06,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2254 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:46:06,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:46:06,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94] total 141 [2018-10-01 00:46:06,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-01 00:46:06,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-01 00:46:06,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:46:06,370 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 142 states. [2018-10-01 00:46:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:46:10,709 INFO L93 Difference]: Finished difference Result 293 states and 295 transitions. [2018-10-01 00:46:10,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-01 00:46:10,709 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 192 [2018-10-01 00:46:10,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:46:10,710 INFO L225 Difference]: With dead ends: 293 [2018-10-01 00:46:10,710 INFO L226 Difference]: Without dead ends: 195 [2018-10-01 00:46:10,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-10-01 00:46:10,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-01 00:46:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-01 00:46:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-01 00:46:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-10-01 00:46:10,736 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-10-01 00:46:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:46:10,736 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-10-01 00:46:10,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-01 00:46:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-10-01 00:46:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-01 00:46:10,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:46:10,737 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-10-01 00:46:10,738 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:46:10,738 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:46:10,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1328268813, now seen corresponding path program 69 times [2018-10-01 00:46:10,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:46:10,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:46:10,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:10,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:46:10,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:11,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:46:11,742 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 [2018-10-01 00:46:11,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:46:11,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-01 00:46:11,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:46:12,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:46:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:13,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:46:13,403 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 143 [2018-10-01 00:46:13,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-10-01 00:46:13,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-10-01 00:46:13,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:46:13,404 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 144 states. [2018-10-01 00:46:17,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:46:17,725 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2018-10-01 00:46:17,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-01 00:46:17,725 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 194 [2018-10-01 00:46:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:46:17,726 INFO L225 Difference]: With dead ends: 295 [2018-10-01 00:46:17,726 INFO L226 Difference]: Without dead ends: 197 [2018-10-01 00:46:17,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time [2018-10-01 00:46:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-01 00:46:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-01 00:46:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-01 00:46:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-10-01 00:46:17,757 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-10-01 00:46:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:46:17,757 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-10-01 00:46:17,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-10-01 00:46:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-10-01 00:46:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-01 00:46:17,758 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:46:17,758 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-10-01 00:46:17,758 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:46:17,758 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:46:17,758 INFO L82 PathProgramCache]: Analyzing trace with hash 742962671, now seen corresponding path program 70 times [2018-10-01 00:46:17,759 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:46:17,759 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:46:17,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:17,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:46:17,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:18,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:46:18,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:46:18,517 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:46:18,674 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:46:18,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:46:18,681 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:46:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:19,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:46:19,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-10-01 00:46:19,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 00:46:19,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 00:46:19,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:46:19,069 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-10-01 00:46:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:46:21,281 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2018-10-01 00:46:21,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-01 00:46:21,281 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-10-01 00:46:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:46:21,282 INFO L225 Difference]: With dead ends: 204 [2018-10-01 00:46:21,282 INFO L226 Difference]: Without dead ends: 202 [2018-10-01 00:46:21,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 00:46:21,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2018-10-01 00:46:21,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2018-10-01 00:46:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-01 00:46:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-10-01 00:46:21,311 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 196 [2018-10-01 00:46:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:46:21,311 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-10-01 00:46:21,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 00:46:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-10-01 00:46:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-01 00:46:21,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:46:21,312 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-10-01 00:46:21,313 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:46:21,313 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:46:21,313 INFO L82 PathProgramCache]: Analyzing trace with hash -821131037, now seen corresponding path program 71 times [2018-10-01 00:46:21,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:46:21,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:46:21,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:21,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:46:21,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:22,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:46:22,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:46:22,434 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:46:22,693 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2018-10-01 00:46:22,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:46:22,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:46:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:24,225 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:46:24,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 148 [2018-10-01 00:46:24,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-10-01 00:46:24,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-10-01 00:46:24,227 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:46:24,227 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 149 states. [2018-10-01 00:46:28,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:46:28,964 INFO L93 Difference]: Finished difference Result 305 states and 307 transitions. [2018-10-01 00:46:28,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-01 00:46:28,964 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 200 [2018-10-01 00:46:28,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:46:28,965 INFO L225 Difference]: With dead ends: 305 [2018-10-01 00:46:28,965 INFO L226 Difference]: Without dead ends: 203 [2018-10-01 00:46:28,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time [2018-10-01 00:46:28,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-01 00:46:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-01 00:46:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-01 00:46:28,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-01 00:46:28,997 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-10-01 00:46:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:46:28,998 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-01 00:46:28,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-10-01 00:46:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-01 00:46:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-01 00:46:28,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:46:28,999 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-10-01 00:46:28,999 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:46:29,000 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:46:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1801644065, now seen corresponding path program 72 times [2018-10-01 00:46:29,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:46:29,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:46:29,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:29,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:46:29,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:30,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:30,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:46:30,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:46:30,108 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:46:30,374 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-01 00:46:30,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:46:30,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:46:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:31,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:46:31,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 149 [2018-10-01 00:46:31,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-01 00:46:31,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-01 00:46:31,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:46:31,725 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 150 states. [2018-10-01 00:46:36,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:46:36,584 INFO L93 Difference]: Finished difference Result 307 states and 309 transitions. [2018-10-01 00:46:36,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-01 00:46:36,584 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 202 [2018-10-01 00:46:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:46:36,585 INFO L225 Difference]: With dead ends: 307 [2018-10-01 00:46:36,585 INFO L226 Difference]: Without dead ends: 205 [2018-10-01 00:46:36,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time [2018-10-01 00:46:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-01 00:46:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-01 00:46:36,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-01 00:46:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-10-01 00:46:36,613 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-10-01 00:46:36,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:46:36,614 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-10-01 00:46:36,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-01 00:46:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-10-01 00:46:36,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-01 00:46:36,615 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:46:36,615 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-10-01 00:46:36,615 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:46:36,615 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:46:36,615 INFO L82 PathProgramCache]: Analyzing trace with hash 818141147, now seen corresponding path program 73 times [2018-10-01 00:46:36,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:46:36,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:46:36,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:36,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:46:36,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:37,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:46:37,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:46:37,237 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:46:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:37,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:46:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:37,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:46:37,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2018-10-01 00:46:37,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-01 00:46:37,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-01 00:46:37,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:46:37,773 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 56 states. [2018-10-01 00:46:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:46:40,605 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-01 00:46:40,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-01 00:46:40,605 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 204 [2018-10-01 00:46:40,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:46:40,606 INFO L225 Difference]: With dead ends: 212 [2018-10-01 00:46:40,606 INFO L226 Difference]: Without dead ends: 210 [2018-10-01 00:46:40,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 00:46:40,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2018-10-01 00:46:40,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2018-10-01 00:46:40,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-01 00:46:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2018-10-01 00:46:40,638 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 204 [2018-10-01 00:46:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:46:40,638 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2018-10-01 00:46:40,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-01 00:46:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2018-10-01 00:46:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-01 00:46:40,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:46:40,639 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 50, 1, 1, 1, 1] [2018-10-01 00:46:40,639 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:46:40,639 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:46:40,639 INFO L82 PathProgramCache]: Analyzing trace with hash -66136881, now seen corresponding path program 74 times [2018-10-01 00:46:40,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:46:40,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:46:40,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:40,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:46:40,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2652 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:41,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:46:41,734 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 [2018-10-01 00:46:41,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:46:41,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:46:41,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:46:41,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:46:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2650 proven. 2550 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:46:43,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:46:43,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102] total 153 [2018-10-01 00:46:43,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-01 00:46:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-01 00:46:43,286 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:46:43,286 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand 154 states. [2018-10-01 00:46:48,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:46:48,310 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2018-10-01 00:46:48,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-01 00:46:48,310 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 208 [2018-10-01 00:46:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:46:48,311 INFO L225 Difference]: With dead ends: 317 [2018-10-01 00:46:48,311 INFO L226 Difference]: Without dead ends: 211 [2018-10-01 00:46:48,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time [2018-10-01 00:46:48,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-01 00:46:48,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-01 00:46:48,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-01 00:46:48,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-10-01 00:46:48,342 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 208 [2018-10-01 00:46:48,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:46:48,342 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-10-01 00:46:48,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-01 00:46:48,342 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-10-01 00:46:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-01 00:46:48,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:46:48,343 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-10-01 00:46:48,343 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:46:48,344 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:46:48,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1015850955, now seen corresponding path program 75 times [2018-10-01 00:46:48,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:46:48,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:46:48,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:48,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:46:48,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:49,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:46:49,684 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:46:49,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:46:49,980 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-01 00:46:49,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:46:49,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:46:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:51,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:46:51,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 155 [2018-10-01 00:46:51,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-10-01 00:46:51,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-10-01 00:46:51,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:46:51,465 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 156 states. [2018-10-01 00:46:56,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:46:56,508 INFO L93 Difference]: Finished difference Result 319 states and 321 transitions. [2018-10-01 00:46:56,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-01 00:46:56,508 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 210 [2018-10-01 00:46:56,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:46:56,509 INFO L225 Difference]: With dead ends: 319 [2018-10-01 00:46:56,509 INFO L226 Difference]: Without dead ends: 213 [2018-10-01 00:46:56,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time [2018-10-01 00:46:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-01 00:46:56,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-10-01 00:46:56,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-01 00:46:56,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2018-10-01 00:46:56,546 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2018-10-01 00:46:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:46:56,546 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2018-10-01 00:46:56,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-10-01 00:46:56,546 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2018-10-01 00:46:56,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-01 00:46:56,547 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:46:56,547 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 51, 1, 1, 1, 1] [2018-10-01 00:46:56,547 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:46:56,547 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:46:56,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1424075719, now seen corresponding path program 76 times [2018-10-01 00:46:56,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:46:56,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:46:56,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:56,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:46:56,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:46:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:46:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:57,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:46:57,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:46:57,145 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:46:57,315 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:46:57,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:46:57,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:46:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:46:57,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:46:57,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2018-10-01 00:46:57,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 00:46:57,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 00:46:57,736 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:46:57,736 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 58 states. [2018-10-01 00:47:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:47:00,319 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2018-10-01 00:47:00,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-01 00:47:00,320 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 212 [2018-10-01 00:47:00,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:47:00,321 INFO L225 Difference]: With dead ends: 220 [2018-10-01 00:47:00,321 INFO L226 Difference]: Without dead ends: 218 [2018-10-01 00:47:00,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 00:47:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-10-01 00:47:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2018-10-01 00:47:00,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-01 00:47:00,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2018-10-01 00:47:00,355 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 212 [2018-10-01 00:47:00,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:47:00,356 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2018-10-01 00:47:00,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 00:47:00,356 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2018-10-01 00:47:00,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-01 00:47:00,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:47:00,357 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 52, 1, 1, 1, 1] [2018-10-01 00:47:00,357 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:47:00,357 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:47:00,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1946735291, now seen corresponding path program 77 times [2018-10-01 00:47:00,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:47:00,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:47:00,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:00,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:47:00,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:47:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:01,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:47:01,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:47:01,503 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:47:01,807 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-01 00:47:01,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:47:01,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:47:03,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:03,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:47:03,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 160 [2018-10-01 00:47:03,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-10-01 00:47:03,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-10-01 00:47:03,320 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:47:03,320 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 161 states. [2018-10-01 00:47:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:47:08,712 INFO L93 Difference]: Finished difference Result 329 states and 331 transitions. [2018-10-01 00:47:08,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-01 00:47:08,712 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 216 [2018-10-01 00:47:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:47:08,713 INFO L225 Difference]: With dead ends: 329 [2018-10-01 00:47:08,729 INFO L226 Difference]: Without dead ends: 219 [2018-10-01 00:47:08,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time [2018-10-01 00:47:08,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-01 00:47:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-01 00:47:08,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-01 00:47:08,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-10-01 00:47:08,763 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2018-10-01 00:47:08,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:47:08,764 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-10-01 00:47:08,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-10-01 00:47:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-10-01 00:47:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-01 00:47:08,765 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:47:08,765 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-10-01 00:47:08,765 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:47:08,765 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:47:08,765 INFO L82 PathProgramCache]: Analyzing trace with hash -34477641, now seen corresponding path program 78 times [2018-10-01 00:47:08,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:47:08,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:47:08,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:08,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:47:08,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:47:10,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:10,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:47:10,088 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 [2018-10-01 00:47:10,096 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:47:10,393 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 54 check-sat command(s) [2018-10-01 00:47:10,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:47:10,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:47:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:11,915 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:47:11,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 161 [2018-10-01 00:47:11,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-01 00:47:11,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-01 00:47:11,917 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:47:11,917 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 162 states. [2018-10-01 00:47:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:47:16,098 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2018-10-01 00:47:16,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-01 00:47:16,098 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 218 [2018-10-01 00:47:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:47:16,099 INFO L225 Difference]: With dead ends: 331 [2018-10-01 00:47:16,099 INFO L226 Difference]: Without dead ends: 221 [2018-10-01 00:47:16,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time [2018-10-01 00:47:16,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-01 00:47:16,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-01 00:47:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-01 00:47:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2018-10-01 00:47:16,133 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 218 [2018-10-01 00:47:16,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:47:16,133 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2018-10-01 00:47:16,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-01 00:47:16,133 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2018-10-01 00:47:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-01 00:47:16,134 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:47:16,134 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 54, 53, 1, 1, 1, 1] [2018-10-01 00:47:16,134 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:47:16,134 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:47:16,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1309593165, now seen corresponding path program 79 times [2018-10-01 00:47:16,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:47:16,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:47:16,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:16,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:47:16,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:47:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:16,794 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:47:16,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:47:16,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:47:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:47:16,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:47:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:17,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:47:17,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2018-10-01 00:47:17,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 00:47:17,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 00:47:17,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:47:17,385 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand 60 states. [2018-10-01 00:47:20,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:47:20,124 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2018-10-01 00:47:20,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-01 00:47:20,125 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 220 [2018-10-01 00:47:20,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:47:20,126 INFO L225 Difference]: With dead ends: 228 [2018-10-01 00:47:20,126 INFO L226 Difference]: Without dead ends: 226 [2018-10-01 00:47:20,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 00:47:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-01 00:47:20,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2018-10-01 00:47:20,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-01 00:47:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2018-10-01 00:47:20,163 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 220 [2018-10-01 00:47:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:47:20,163 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2018-10-01 00:47:20,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 00:47:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2018-10-01 00:47:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-01 00:47:20,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:47:20,164 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 54, 1, 1, 1, 1] [2018-10-01 00:47:20,164 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:47:20,164 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:47:20,164 INFO L82 PathProgramCache]: Analyzing trace with hash 281772711, now seen corresponding path program 80 times [2018-10-01 00:47:20,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:47:20,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:47:20,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:20,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:47:20,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:47:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3080 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:21,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:47:21,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:47:21,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:47:21,617 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:47:21,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:47:21,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:47:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3078 proven. 2970 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:47:23,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:47:23,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 110] total 165 [2018-10-01 00:47:23,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-10-01 00:47:23,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-10-01 00:47:23,119 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:47:23,119 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 166 states. [2018-10-01 00:47:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:47:28,768 INFO L93 Difference]: Finished difference Result 341 states and 343 transitions. [2018-10-01 00:47:28,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-01 00:47:28,768 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 224 [2018-10-01 00:47:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:47:28,769 INFO L225 Difference]: With dead ends: 341 [2018-10-01 00:47:28,769 INFO L226 Difference]: Without dead ends: 227 [2018-10-01 00:47:28,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time [2018-10-01 00:47:28,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-01 00:47:28,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-10-01 00:47:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-01 00:47:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-10-01 00:47:28,812 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 224 [2018-10-01 00:47:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:47:28,812 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-10-01 00:47:28,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-10-01 00:47:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-10-01 00:47:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-01 00:47:28,813 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:47:28,813 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-10-01 00:47:28,814 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:47:28,814 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:47:28,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1989926307, now seen corresponding path program 81 times [2018-10-01 00:47:28,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:47:28,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:47:28,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:28,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:47:28,815 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:47:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3080 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:30,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:47:30,202 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 [2018-10-01 00:47:30,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:47:30,540 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2018-10-01 00:47:30,540 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:47:30,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:47:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3080 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:32,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:47:32,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 167 [2018-10-01 00:47:32,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-10-01 00:47:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-10-01 00:47:32,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:47:32,035 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 168 states. [2018-10-01 00:47:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:47:37,830 INFO L93 Difference]: Finished difference Result 343 states and 345 transitions. [2018-10-01 00:47:37,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-01 00:47:37,830 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 226 [2018-10-01 00:47:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:47:37,831 INFO L225 Difference]: With dead ends: 343 [2018-10-01 00:47:37,831 INFO L226 Difference]: Without dead ends: 229 [2018-10-01 00:47:37,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time [2018-10-01 00:47:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-01 00:47:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-10-01 00:47:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-01 00:47:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2018-10-01 00:47:37,867 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 226 [2018-10-01 00:47:37,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:47:37,867 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2018-10-01 00:47:37,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-10-01 00:47:37,867 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2018-10-01 00:47:37,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-01 00:47:37,868 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:47:37,868 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 56, 55, 1, 1, 1, 1] [2018-10-01 00:47:37,868 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:47:37,868 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:47:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1446942305, now seen corresponding path program 82 times [2018-10-01 00:47:37,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:47:37,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:47:37,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:37,870 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:47:37,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:47:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 3192 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:38,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:47:38,510 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:47:38,519 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:47:38,699 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:47:38,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:47:38,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:47:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 3192 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:39,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:47:39,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2018-10-01 00:47:39,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 00:47:39,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 00:47:39,141 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:47:39,141 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand 62 states. [2018-10-01 00:47:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:47:41,746 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-01 00:47:41,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-10-01 00:47:41,746 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 228 [2018-10-01 00:47:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:47:41,747 INFO L225 Difference]: With dead ends: 236 [2018-10-01 00:47:41,747 INFO L226 Difference]: Without dead ends: 234 [2018-10-01 00:47:41,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 00:47:41,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-01 00:47:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2018-10-01 00:47:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-10-01 00:47:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 234 transitions. [2018-10-01 00:47:41,786 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 234 transitions. Word has length 228 [2018-10-01 00:47:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:47:41,786 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 234 transitions. [2018-10-01 00:47:41,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 00:47:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 234 transitions. [2018-10-01 00:47:41,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-01 00:47:41,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:47:41,787 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 57, 56, 1, 1, 1, 1] [2018-10-01 00:47:41,787 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:47:41,787 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:47:41,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1264196461, now seen corresponding path program 83 times [2018-10-01 00:47:41,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:47:41,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:47:41,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:41,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:47:41,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:47:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 3306 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:43,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:47:43,097 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 [2018-10-01 00:47:43,104 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:47:43,438 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-10-01 00:47:43,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:47:43,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:47:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 3306 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:45,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:47:45,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 172 [2018-10-01 00:47:45,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-10-01 00:47:45,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-10-01 00:47:45,226 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:47:45,226 INFO L87 Difference]: Start difference. First operand 233 states and 234 transitions. Second operand 173 states. [2018-10-01 00:47:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:47:51,418 INFO L93 Difference]: Finished difference Result 353 states and 355 transitions. [2018-10-01 00:47:51,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-10-01 00:47:51,419 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 232 [2018-10-01 00:47:51,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:47:51,420 INFO L225 Difference]: With dead ends: 353 [2018-10-01 00:47:51,420 INFO L226 Difference]: Without dead ends: 235 [2018-10-01 00:47:51,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time [2018-10-01 00:47:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-10-01 00:47:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-10-01 00:47:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-01 00:47:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2018-10-01 00:47:51,458 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 232 [2018-10-01 00:47:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:47:51,459 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2018-10-01 00:47:51,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-10-01 00:47:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2018-10-01 00:47:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-10-01 00:47:51,460 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:47:51,460 INFO L375 BasicCegarLoop]: trace histogram [58, 58, 57, 57, 1, 1, 1, 1] [2018-10-01 00:47:51,461 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:47:51,461 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:47:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1289323407, now seen corresponding path program 84 times [2018-10-01 00:47:51,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:47:51,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:47:51,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:51,462 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:47:51,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:47:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:47:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3306 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:52,728 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:47:52,728 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 [2018-10-01 00:47:52,738 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:47:53,090 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-10-01 00:47:53,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:47:53,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:47:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6612 backedges. 3306 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:47:54,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:47:54,718 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 173 [2018-10-01 00:47:54,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-10-01 00:47:54,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-10-01 00:47:54,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:47:54,720 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 174 states. [2018-10-01 00:48:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:01,232 INFO L93 Difference]: Finished difference Result 355 states and 357 transitions. [2018-10-01 00:48:01,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-10-01 00:48:01,233 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 234 [2018-10-01 00:48:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:01,234 INFO L225 Difference]: With dead ends: 355 [2018-10-01 00:48:01,234 INFO L226 Difference]: Without dead ends: 237 [2018-10-01 00:48:01,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time [2018-10-01 00:48:01,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-10-01 00:48:01,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-10-01 00:48:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-10-01 00:48:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2018-10-01 00:48:01,272 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 234 [2018-10-01 00:48:01,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:01,272 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2018-10-01 00:48:01,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-10-01 00:48:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2018-10-01 00:48:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-10-01 00:48:01,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:01,273 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 58, 57, 1, 1, 1, 1] [2018-10-01 00:48:01,273 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:01,273 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:01,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1499376757, now seen corresponding path program 85 times [2018-10-01 00:48:01,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:01,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:01,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:01,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:01,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:01,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 3422 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:02,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:48:02,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:48:02,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:02,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:02,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6728 backedges. 3422 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:02,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:48:02,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61] total 63 [2018-10-01 00:48:02,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-01 00:48:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-01 00:48:02,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:02,856 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand 64 states. [2018-10-01 00:48:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:05,843 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2018-10-01 00:48:05,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-10-01 00:48:05,844 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 236 [2018-10-01 00:48:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:05,845 INFO L225 Difference]: With dead ends: 244 [2018-10-01 00:48:05,845 INFO L226 Difference]: Without dead ends: 242 [2018-10-01 00:48:05,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 00:48:05,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2018-10-01 00:48:05,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2018-10-01 00:48:05,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-10-01 00:48:05,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2018-10-01 00:48:05,899 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 236 [2018-10-01 00:48:05,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:05,899 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2018-10-01 00:48:05,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-01 00:48:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2018-10-01 00:48:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-10-01 00:48:05,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:05,900 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 59, 58, 1, 1, 1, 1] [2018-10-01 00:48:05,901 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:05,901 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash 174520447, now seen corresponding path program 86 times [2018-10-01 00:48:05,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:05,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:05,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:05,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:05,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 3540 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:07,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:48:07,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:48:07,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:48:07,476 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:48:07,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:07,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6962 backedges. 3538 proven. 3422 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:48:09,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:48:09,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 118] total 177 [2018-10-01 00:48:09,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-10-01 00:48:09,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-10-01 00:48:09,354 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:09,354 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 178 states. [2018-10-01 00:48:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:16,040 INFO L93 Difference]: Finished difference Result 365 states and 367 transitions. [2018-10-01 00:48:16,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-10-01 00:48:16,040 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 240 [2018-10-01 00:48:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:16,041 INFO L225 Difference]: With dead ends: 365 [2018-10-01 00:48:16,041 INFO L226 Difference]: Without dead ends: 243 [2018-10-01 00:48:16,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time [2018-10-01 00:48:16,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-01 00:48:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-10-01 00:48:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-10-01 00:48:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2018-10-01 00:48:16,081 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 240 [2018-10-01 00:48:16,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:16,082 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2018-10-01 00:48:16,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-10-01 00:48:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2018-10-01 00:48:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-01 00:48:16,083 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:16,083 INFO L375 BasicCegarLoop]: trace histogram [60, 60, 59, 59, 1, 1, 1, 1] [2018-10-01 00:48:16,083 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:16,083 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:16,083 INFO L82 PathProgramCache]: Analyzing trace with hash -277226629, now seen corresponding path program 87 times [2018-10-01 00:48:16,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:16,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:16,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:16,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:16,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3540 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:17,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:48:17,413 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 [2018-10-01 00:48:17,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:48:17,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-10-01 00:48:17,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:17,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 3540 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:19,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:48:19,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 179 [2018-10-01 00:48:19,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 180 states [2018-10-01 00:48:19,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2018-10-01 00:48:19,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:19,573 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 180 states. [2018-10-01 00:48:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:24,551 INFO L93 Difference]: Finished difference Result 367 states and 369 transitions. [2018-10-01 00:48:24,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-01 00:48:24,551 INFO L78 Accepts]: Start accepts. Automaton has 180 states. Word has length 242 [2018-10-01 00:48:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:24,552 INFO L225 Difference]: With dead ends: 367 [2018-10-01 00:48:24,552 INFO L226 Difference]: Without dead ends: 245 [2018-10-01 00:48:24,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time [2018-10-01 00:48:24,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-10-01 00:48:24,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-10-01 00:48:24,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-01 00:48:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2018-10-01 00:48:24,594 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 242 [2018-10-01 00:48:24,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:24,594 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2018-10-01 00:48:24,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 180 states. [2018-10-01 00:48:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2018-10-01 00:48:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-01 00:48:24,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:24,595 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 60, 59, 1, 1, 1, 1] [2018-10-01 00:48:24,596 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:24,596 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:24,596 INFO L82 PathProgramCache]: Analyzing trace with hash -614469769, now seen corresponding path program 88 times [2018-10-01 00:48:24,596 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:24,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:24,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:24,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:24,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 3660 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:25,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:48:25,312 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 [2018-10-01 00:48:25,320 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:48:25,511 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:48:25,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:25,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7200 backedges. 3660 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:26,112 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:48:26,112 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 65 [2018-10-01 00:48:26,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-01 00:48:26,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-01 00:48:26,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:26,113 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand 66 states. [2018-10-01 00:48:28,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:28,846 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2018-10-01 00:48:28,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-10-01 00:48:28,846 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 244 [2018-10-01 00:48:28,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:28,847 INFO L225 Difference]: With dead ends: 252 [2018-10-01 00:48:28,848 INFO L226 Difference]: Without dead ends: 250 [2018-10-01 00:48:28,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-10-01 00:48:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2018-10-01 00:48:28,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2018-10-01 00:48:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-10-01 00:48:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2018-10-01 00:48:28,904 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 244 [2018-10-01 00:48:28,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:28,904 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2018-10-01 00:48:28,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-01 00:48:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2018-10-01 00:48:28,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-01 00:48:28,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:28,905 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 61, 60, 1, 1, 1, 1] [2018-10-01 00:48:28,905 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:28,906 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:28,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1163771499, now seen corresponding path program 89 times [2018-10-01 00:48:28,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:28,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:28,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:28,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:28,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7442 backedges. 3782 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:30,331 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:48:30,331 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 [2018-10-01 00:48:30,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:48:30,708 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 62 check-sat command(s) [2018-10-01 00:48:30,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:30,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7442 backedges. 3782 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:32,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:48:32,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 184 [2018-10-01 00:48:32,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 185 states [2018-10-01 00:48:32,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2018-10-01 00:48:32,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:32,628 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand 185 states. [2018-10-01 00:48:39,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:39,604 INFO L93 Difference]: Finished difference Result 377 states and 379 transitions. [2018-10-01 00:48:39,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-10-01 00:48:39,604 INFO L78 Accepts]: Start accepts. Automaton has 185 states. Word has length 248 [2018-10-01 00:48:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:39,605 INFO L225 Difference]: With dead ends: 377 [2018-10-01 00:48:39,605 INFO L226 Difference]: Without dead ends: 251 [2018-10-01 00:48:39,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time [2018-10-01 00:48:39,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-01 00:48:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-10-01 00:48:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-01 00:48:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 252 transitions. [2018-10-01 00:48:39,648 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 252 transitions. Word has length 248 [2018-10-01 00:48:39,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:39,649 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 252 transitions. [2018-10-01 00:48:39,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 185 states. [2018-10-01 00:48:39,649 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 252 transitions. [2018-10-01 00:48:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-10-01 00:48:39,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:39,650 INFO L375 BasicCegarLoop]: trace histogram [62, 62, 61, 61, 1, 1, 1, 1] [2018-10-01 00:48:39,650 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:39,650 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1439425895, now seen corresponding path program 90 times [2018-10-01 00:48:39,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:39,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:39,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:39,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:39,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3782 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:41,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:48:41,110 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:48:41,116 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:48:41,484 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-10-01 00:48:41,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:41,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7564 backedges. 3782 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:43,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:48:43,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 185 [2018-10-01 00:48:43,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-10-01 00:48:43,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-10-01 00:48:43,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:43,258 INFO L87 Difference]: Start difference. First operand 251 states and 252 transitions. Second operand 186 states. [2018-10-01 00:48:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:50,396 INFO L93 Difference]: Finished difference Result 379 states and 381 transitions. [2018-10-01 00:48:50,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-10-01 00:48:50,396 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 250 [2018-10-01 00:48:50,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:50,397 INFO L225 Difference]: With dead ends: 379 [2018-10-01 00:48:50,397 INFO L226 Difference]: Without dead ends: 253 [2018-10-01 00:48:50,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time [2018-10-01 00:48:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-10-01 00:48:50,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-10-01 00:48:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-10-01 00:48:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2018-10-01 00:48:50,440 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 250 [2018-10-01 00:48:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:50,440 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2018-10-01 00:48:50,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-10-01 00:48:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2018-10-01 00:48:50,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-01 00:48:50,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:50,442 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 62, 61, 1, 1, 1, 1] [2018-10-01 00:48:50,442 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:50,442 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:50,442 INFO L82 PathProgramCache]: Analyzing trace with hash 55328099, now seen corresponding path program 91 times [2018-10-01 00:48:50,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:50,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:50,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:50,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:48:50,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 3906 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:51,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:48:51,209 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 [2018-10-01 00:48:51,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:51,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7688 backedges. 3906 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:52,039 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:48:52,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65] total 67 [2018-10-01 00:48:52,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-01 00:48:52,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-01 00:48:52,040 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:52,040 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 68 states. [2018-10-01 00:48:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:48:55,125 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-10-01 00:48:55,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-10-01 00:48:55,125 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 252 [2018-10-01 00:48:55,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:48:55,127 INFO L225 Difference]: With dead ends: 260 [2018-10-01 00:48:55,127 INFO L226 Difference]: Without dead ends: 258 [2018-10-01 00:48:55,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 312 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 00:48:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-10-01 00:48:55,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2018-10-01 00:48:55,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-10-01 00:48:55,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 258 transitions. [2018-10-01 00:48:55,181 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 258 transitions. Word has length 252 [2018-10-01 00:48:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:48:55,181 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 258 transitions. [2018-10-01 00:48:55,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-01 00:48:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 258 transitions. [2018-10-01 00:48:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-10-01 00:48:55,182 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:48:55,182 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 63, 62, 1, 1, 1, 1] [2018-10-01 00:48:55,182 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:48:55,182 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:48:55,183 INFO L82 PathProgramCache]: Analyzing trace with hash -514247081, now seen corresponding path program 92 times [2018-10-01 00:48:55,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:48:55,183 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:48:55,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:55,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:48:55,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:48:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:48:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 4032 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:48:56,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:48:56,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-01 00:48:56,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:48:56,956 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:48:56,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:48:56,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:48:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7938 backedges. 4030 proven. 3906 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:48:58,856 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:48:58,856 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 126] total 189 [2018-10-01 00:48:58,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-10-01 00:48:58,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-10-01 00:48:58,858 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:48:58,858 INFO L87 Difference]: Start difference. First operand 257 states and 258 transitions. Second operand 190 states. [2018-10-01 00:49:06,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:06,281 INFO L93 Difference]: Finished difference Result 389 states and 391 transitions. [2018-10-01 00:49:06,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-10-01 00:49:06,281 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 256 [2018-10-01 00:49:06,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:06,282 INFO L225 Difference]: With dead ends: 389 [2018-10-01 00:49:06,282 INFO L226 Difference]: Without dead ends: 259 [2018-10-01 00:49:06,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time [2018-10-01 00:49:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-01 00:49:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-10-01 00:49:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-10-01 00:49:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2018-10-01 00:49:06,328 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 256 [2018-10-01 00:49:06,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:06,328 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2018-10-01 00:49:06,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-10-01 00:49:06,328 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2018-10-01 00:49:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-01 00:49:06,329 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:06,329 INFO L375 BasicCegarLoop]: trace histogram [64, 64, 63, 63, 1, 1, 1, 1] [2018-10-01 00:49:06,329 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:06,329 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:06,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1080123053, now seen corresponding path program 93 times [2018-10-01 00:49:06,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:06,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:06,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:06,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:06,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:49:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4032 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:07,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:49:07,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:49:07,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:49:08,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-01 00:49:08,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:08,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8064 backedges. 4032 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:10,321 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:49:10,321 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 191 [2018-10-01 00:49:10,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2018-10-01 00:49:10,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2018-10-01 00:49:10,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:10,324 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 192 states. [2018-10-01 00:49:16,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:16,017 INFO L93 Difference]: Finished difference Result 391 states and 393 transitions. [2018-10-01 00:49:16,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-10-01 00:49:16,017 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 258 [2018-10-01 00:49:16,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:16,018 INFO L225 Difference]: With dead ends: 391 [2018-10-01 00:49:16,018 INFO L226 Difference]: Without dead ends: 261 [2018-10-01 00:49:16,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time [2018-10-01 00:49:16,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-01 00:49:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-10-01 00:49:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-10-01 00:49:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2018-10-01 00:49:16,063 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 258 [2018-10-01 00:49:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:16,064 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2018-10-01 00:49:16,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 192 states. [2018-10-01 00:49:16,064 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2018-10-01 00:49:16,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-10-01 00:49:16,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:16,065 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 64, 63, 1, 1, 1, 1] [2018-10-01 00:49:16,065 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:16,065 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:16,065 INFO L82 PathProgramCache]: Analyzing trace with hash 573914447, now seen corresponding path program 94 times [2018-10-01 00:49:16,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:16,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:16,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:16,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:16,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:49:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8192 backedges. 4160 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:16,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:49:16,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:49:16,865 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:49:17,100 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:49:17,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:17,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8192 backedges. 4160 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:18,015 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:49:18,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 70 [2018-10-01 00:49:18,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-01 00:49:18,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-01 00:49:18,017 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:18,017 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 71 states. [2018-10-01 00:49:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:21,077 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2018-10-01 00:49:21,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-10-01 00:49:21,078 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 260 [2018-10-01 00:49:21,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:21,079 INFO L225 Difference]: With dead ends: 268 [2018-10-01 00:49:21,080 INFO L226 Difference]: Without dead ends: 266 [2018-10-01 00:49:21,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-10-01 00:49:21,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-01 00:49:21,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2018-10-01 00:49:21,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-10-01 00:49:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2018-10-01 00:49:21,128 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 260 [2018-10-01 00:49:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:21,128 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2018-10-01 00:49:21,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-01 00:49:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2018-10-01 00:49:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-10-01 00:49:21,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:21,129 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 65, 64, 1, 1, 1, 1] [2018-10-01 00:49:21,129 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:21,129 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:21,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1655201859, now seen corresponding path program 95 times [2018-10-01 00:49:21,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:21,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:21,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:21,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:21,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:49:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8450 backedges. 4290 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:22,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:49:22,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:49:22,848 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:49:23,269 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-01 00:49:23,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:23,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8450 backedges. 4290 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:25,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:49:25,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 196 [2018-10-01 00:49:25,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2018-10-01 00:49:25,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2018-10-01 00:49:25,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:25,205 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand 197 states. [2018-10-01 00:49:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:32,905 INFO L93 Difference]: Finished difference Result 401 states and 403 transitions. [2018-10-01 00:49:32,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-10-01 00:49:32,906 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 264 [2018-10-01 00:49:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:32,907 INFO L225 Difference]: With dead ends: 401 [2018-10-01 00:49:32,907 INFO L226 Difference]: Without dead ends: 267 [2018-10-01 00:49:32,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s Time [2018-10-01 00:49:32,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-01 00:49:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-10-01 00:49:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-10-01 00:49:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 268 transitions. [2018-10-01 00:49:32,951 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 268 transitions. Word has length 264 [2018-10-01 00:49:32,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:32,951 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 268 transitions. [2018-10-01 00:49:32,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 197 states. [2018-10-01 00:49:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 268 transitions. [2018-10-01 00:49:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-10-01 00:49:32,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:32,952 INFO L375 BasicCegarLoop]: trace histogram [66, 66, 65, 65, 1, 1, 1, 1] [2018-10-01 00:49:32,952 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:32,952 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:32,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1967198015, now seen corresponding path program 96 times [2018-10-01 00:49:32,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:32,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:32,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:32,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:32,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:49:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4290 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:34,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:49:34,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:49:34,534 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:49:34,958 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2018-10-01 00:49:34,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:34,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4290 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:36,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:49:36,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 197 [2018-10-01 00:49:36,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-10-01 00:49:36,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-10-01 00:49:36,940 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:36,940 INFO L87 Difference]: Start difference. First operand 267 states and 268 transitions. Second operand 198 states. [2018-10-01 00:49:45,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:45,002 INFO L93 Difference]: Finished difference Result 403 states and 405 transitions. [2018-10-01 00:49:45,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-10-01 00:49:45,003 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 266 [2018-10-01 00:49:45,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:45,004 INFO L225 Difference]: With dead ends: 403 [2018-10-01 00:49:45,004 INFO L226 Difference]: Without dead ends: 269 [2018-10-01 00:49:45,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s Time [2018-10-01 00:49:45,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-01 00:49:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-10-01 00:49:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-10-01 00:49:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2018-10-01 00:49:45,047 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 266 [2018-10-01 00:49:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:45,047 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2018-10-01 00:49:45,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-10-01 00:49:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2018-10-01 00:49:45,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-10-01 00:49:45,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:45,048 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 66, 65, 1, 1, 1, 1] [2018-10-01 00:49:45,049 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:45,049 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:45,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1147793211, now seen corresponding path program 97 times [2018-10-01 00:49:45,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:45,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:45,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:45,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:49:45,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:49:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8712 backedges. 4422 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:45,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:49:45,917 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:49:45,924 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:49:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:49:46,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8712 backedges. 4422 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:46,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:49:46,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 72 [2018-10-01 00:49:46,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-01 00:49:46,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-01 00:49:46,649 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:46,649 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand 73 states. [2018-10-01 00:49:50,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:49:50,243 INFO L93 Difference]: Finished difference Result 276 states and 278 transitions. [2018-10-01 00:49:50,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-10-01 00:49:50,243 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 268 [2018-10-01 00:49:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:49:50,245 INFO L225 Difference]: With dead ends: 276 [2018-10-01 00:49:50,245 INFO L226 Difference]: Without dead ends: 274 [2018-10-01 00:49:50,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 00:49:50,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-10-01 00:49:50,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2018-10-01 00:49:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-10-01 00:49:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 274 transitions. [2018-10-01 00:49:50,296 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 274 transitions. Word has length 268 [2018-10-01 00:49:50,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:49:50,296 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 274 transitions. [2018-10-01 00:49:50,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-01 00:49:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 274 transitions. [2018-10-01 00:49:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-10-01 00:49:50,297 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:49:50,297 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 67, 66, 1, 1, 1, 1] [2018-10-01 00:49:50,297 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:49:50,298 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:49:50,298 INFO L82 PathProgramCache]: Analyzing trace with hash 370818095, now seen corresponding path program 98 times [2018-10-01 00:49:50,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:49:50,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:49:50,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:50,298 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:49:50,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:49:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:49:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8978 backedges. 4556 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:49:51,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:49:51,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:49:51,938 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:49:52,147 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:49:52,148 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:49:52,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:49:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8978 backedges. 4554 proven. 4422 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:49:54,322 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:49:54,322 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 134] total 201 [2018-10-01 00:49:54,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-10-01 00:49:54,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-10-01 00:49:54,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:49:54,325 INFO L87 Difference]: Start difference. First operand 273 states and 274 transitions. Second operand 202 states. [2018-10-01 00:50:02,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:02,712 INFO L93 Difference]: Finished difference Result 413 states and 415 transitions. [2018-10-01 00:50:02,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-01 00:50:02,713 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 272 [2018-10-01 00:50:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:02,714 INFO L225 Difference]: With dead ends: 413 [2018-10-01 00:50:02,714 INFO L226 Difference]: Without dead ends: 275 [2018-10-01 00:50:02,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s Time [2018-10-01 00:50:02,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-10-01 00:50:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-10-01 00:50:02,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-10-01 00:50:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2018-10-01 00:50:02,768 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 272 [2018-10-01 00:50:02,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:02,768 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2018-10-01 00:50:02,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-10-01 00:50:02,768 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2018-10-01 00:50:02,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-10-01 00:50:02,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:02,769 INFO L375 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 1, 1, 1, 1] [2018-10-01 00:50:02,770 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:02,770 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:02,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2021511381, now seen corresponding path program 99 times [2018-10-01 00:50:02,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:02,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:02,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:02,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:50:02,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:50:04,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4556 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:04,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:50:04,593 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:50:04,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:50:05,060 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2018-10-01 00:50:05,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:05,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9112 backedges. 4556 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:07,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:50:07,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 203 [2018-10-01 00:50:07,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 204 states [2018-10-01 00:50:07,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2018-10-01 00:50:07,120 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:07,120 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand 204 states. [2018-10-01 00:50:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:15,522 INFO L93 Difference]: Finished difference Result 415 states and 417 transitions. [2018-10-01 00:50:15,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-10-01 00:50:15,522 INFO L78 Accepts]: Start accepts. Automaton has 204 states. Word has length 274 [2018-10-01 00:50:15,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:15,523 INFO L225 Difference]: With dead ends: 415 [2018-10-01 00:50:15,523 INFO L226 Difference]: Without dead ends: 277 [2018-10-01 00:50:15,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s Time [2018-10-01 00:50:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-10-01 00:50:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-10-01 00:50:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-10-01 00:50:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2018-10-01 00:50:15,578 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 274 [2018-10-01 00:50:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:15,578 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2018-10-01 00:50:15,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 204 states. [2018-10-01 00:50:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2018-10-01 00:50:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-10-01 00:50:15,580 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:15,580 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 68, 67, 1, 1, 1, 1] [2018-10-01 00:50:15,580 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:15,580 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:15,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1052332839, now seen corresponding path program 100 times [2018-10-01 00:50:15,581 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:15,581 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:15,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:15,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:50:15,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:50:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9248 backedges. 4692 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:16,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:50:16,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:50:16,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:50:16,713 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:50:16,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:16,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 9248 backedges. 4692 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:17,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:50:17,265 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 74 [2018-10-01 00:50:17,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-01 00:50:17,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-01 00:50:17,266 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:17,267 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 75 states. [2018-10-01 00:50:20,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:20,767 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-10-01 00:50:20,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-10-01 00:50:20,767 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 276 [2018-10-01 00:50:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:20,769 INFO L225 Difference]: With dead ends: 284 [2018-10-01 00:50:20,769 INFO L226 Difference]: Without dead ends: 282 [2018-10-01 00:50:20,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-10-01 00:50:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2018-10-01 00:50:20,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2018-10-01 00:50:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-10-01 00:50:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 282 transitions. [2018-10-01 00:50:20,825 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 282 transitions. Word has length 276 [2018-10-01 00:50:20,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:20,825 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 282 transitions. [2018-10-01 00:50:20,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-01 00:50:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 282 transitions. [2018-10-01 00:50:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-10-01 00:50:20,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:20,826 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 69, 68, 1, 1, 1, 1] [2018-10-01 00:50:20,827 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:20,827 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:20,827 INFO L82 PathProgramCache]: Analyzing trace with hash -788674021, now seen corresponding path program 101 times [2018-10-01 00:50:20,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:20,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:20,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:20,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:50:20,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:50:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9522 backedges. 4830 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:22,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:50:22,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:50:22,516 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:50:22,979 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-10-01 00:50:22,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:22,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9522 backedges. 4830 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:25,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:50:25,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 208 [2018-10-01 00:50:25,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 209 states [2018-10-01 00:50:25,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2018-10-01 00:50:25,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:25,198 INFO L87 Difference]: Start difference. First operand 281 states and 282 transitions. Second operand 209 states. [2018-10-01 00:50:34,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:34,194 INFO L93 Difference]: Finished difference Result 425 states and 427 transitions. [2018-10-01 00:50:34,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-10-01 00:50:34,195 INFO L78 Accepts]: Start accepts. Automaton has 209 states. Word has length 280 [2018-10-01 00:50:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:34,196 INFO L225 Difference]: With dead ends: 425 [2018-10-01 00:50:34,196 INFO L226 Difference]: Without dead ends: 283 [2018-10-01 00:50:34,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s Time [2018-10-01 00:50:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-10-01 00:50:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-10-01 00:50:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-10-01 00:50:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2018-10-01 00:50:34,250 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 280 [2018-10-01 00:50:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:34,250 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2018-10-01 00:50:34,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 209 states. [2018-10-01 00:50:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2018-10-01 00:50:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-10-01 00:50:34,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:34,251 INFO L375 BasicCegarLoop]: trace histogram [70, 70, 69, 69, 1, 1, 1, 1] [2018-10-01 00:50:34,251 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:34,251 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:34,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1884225257, now seen corresponding path program 102 times [2018-10-01 00:50:34,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:34,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:34,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:34,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:50:34,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:50:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 4830 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:35,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:50:35,990 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:50:35,997 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:50:36,448 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-10-01 00:50:36,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:36,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:38,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9660 backedges. 4830 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:38,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:50:38,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 209 [2018-10-01 00:50:38,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-10-01 00:50:38,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-10-01 00:50:38,603 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:38,603 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand 210 states. [2018-10-01 00:50:47,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:47,589 INFO L93 Difference]: Finished difference Result 427 states and 429 transitions. [2018-10-01 00:50:47,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-10-01 00:50:47,590 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 282 [2018-10-01 00:50:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:47,590 INFO L225 Difference]: With dead ends: 427 [2018-10-01 00:50:47,590 INFO L226 Difference]: Without dead ends: 285 [2018-10-01 00:50:47,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s Time [2018-10-01 00:50:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-10-01 00:50:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-10-01 00:50:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-10-01 00:50:47,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2018-10-01 00:50:47,645 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 282 [2018-10-01 00:50:47,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:47,645 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2018-10-01 00:50:47,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-10-01 00:50:47,646 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2018-10-01 00:50:47,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-10-01 00:50:47,646 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:47,647 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 70, 69, 1, 1, 1, 1] [2018-10-01 00:50:47,647 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:47,647 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:47,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1852991763, now seen corresponding path program 103 times [2018-10-01 00:50:47,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:47,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:47,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:47,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:50:47,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:50:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9800 backedges. 4970 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:48,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:50:48,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:50:48,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:50:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:50:48,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:49,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9800 backedges. 4970 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:49,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:50:49,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 76 [2018-10-01 00:50:49,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-01 00:50:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-01 00:50:49,436 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:49,436 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand 77 states. [2018-10-01 00:50:52,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:50:52,948 INFO L93 Difference]: Finished difference Result 292 states and 294 transitions. [2018-10-01 00:50:52,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-10-01 00:50:52,948 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 284 [2018-10-01 00:50:52,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:50:52,949 INFO L225 Difference]: With dead ends: 292 [2018-10-01 00:50:52,949 INFO L226 Difference]: Without dead ends: 290 [2018-10-01 00:50:52,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 350 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-10-01 00:50:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-10-01 00:50:53,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2018-10-01 00:50:53,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-10-01 00:50:53,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2018-10-01 00:50:53,008 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 284 [2018-10-01 00:50:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:50:53,009 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2018-10-01 00:50:53,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-01 00:50:53,009 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2018-10-01 00:50:53,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-10-01 00:50:53,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:50:53,010 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 71, 70, 1, 1, 1, 1] [2018-10-01 00:50:53,010 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:50:53,010 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:50:53,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1323169273, now seen corresponding path program 104 times [2018-10-01 00:50:53,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:50:53,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:50:53,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:53,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:50:53,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:50:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:50:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10082 backedges. 5112 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:50:54,957 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:50:54,957 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:50:54,965 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:50:55,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:50:55,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:50:55,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:50:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10082 backedges. 5110 proven. 4970 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:50:57,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:50:57,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 142] total 213 [2018-10-01 00:50:57,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-10-01 00:50:57,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-10-01 00:50:57,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:50:57,322 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 214 states. [2018-10-01 00:51:06,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:51:06,311 INFO L93 Difference]: Finished difference Result 437 states and 439 transitions. [2018-10-01 00:51:06,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-10-01 00:51:06,311 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 288 [2018-10-01 00:51:06,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:51:06,312 INFO L225 Difference]: With dead ends: 437 [2018-10-01 00:51:06,312 INFO L226 Difference]: Without dead ends: 291 [2018-10-01 00:51:06,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s Time [2018-10-01 00:51:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-01 00:51:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-10-01 00:51:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-10-01 00:51:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 292 transitions. [2018-10-01 00:51:06,369 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 292 transitions. Word has length 288 [2018-10-01 00:51:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:51:06,369 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 292 transitions. [2018-10-01 00:51:06,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-10-01 00:51:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 292 transitions. [2018-10-01 00:51:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-10-01 00:51:06,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:51:06,370 INFO L375 BasicCegarLoop]: trace histogram [72, 72, 71, 71, 1, 1, 1, 1] [2018-10-01 00:51:06,370 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:51:06,370 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:51:06,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1872528643, now seen corresponding path program 105 times [2018-10-01 00:51:06,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:51:06,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:51:06,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:06,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:51:06,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:51:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5112 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:08,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:51:08,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:51:08,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:51:08,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-10-01 00:51:08,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:51:08,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:51:11,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5112 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:11,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:51:11,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 215 [2018-10-01 00:51:11,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 216 states [2018-10-01 00:51:11,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 216 interpolants. [2018-10-01 00:51:11,060 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:51:11,060 INFO L87 Difference]: Start difference. First operand 291 states and 292 transitions. Second operand 216 states. [2018-10-01 00:51:20,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:51:20,532 INFO L93 Difference]: Finished difference Result 439 states and 441 transitions. [2018-10-01 00:51:20,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-10-01 00:51:20,532 INFO L78 Accepts]: Start accepts. Automaton has 216 states. Word has length 290 [2018-10-01 00:51:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:51:20,533 INFO L225 Difference]: With dead ends: 439 [2018-10-01 00:51:20,533 INFO L226 Difference]: Without dead ends: 293 [2018-10-01 00:51:20,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9s Time [2018-10-01 00:51:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-10-01 00:51:20,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-10-01 00:51:20,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-01 00:51:20,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 294 transitions. [2018-10-01 00:51:20,589 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 294 transitions. Word has length 290 [2018-10-01 00:51:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:51:20,589 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 294 transitions. [2018-10-01 00:51:20,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 216 states. [2018-10-01 00:51:20,590 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 294 transitions. [2018-10-01 00:51:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-01 00:51:20,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:51:20,591 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 72, 71, 1, 1, 1, 1] [2018-10-01 00:51:20,591 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:51:20,591 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:51:20,591 INFO L82 PathProgramCache]: Analyzing trace with hash 2036609279, now seen corresponding path program 106 times [2018-10-01 00:51:20,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:51:20,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:51:20,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:20,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:51:20,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:51:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10368 backedges. 5256 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:21,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:51:21,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:51:21,566 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:51:21,808 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:51:21,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:51:21,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:51:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10368 backedges. 5256 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:22,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:51:22,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 78 [2018-10-01 00:51:22,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-01 00:51:22,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-01 00:51:22,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:51:22,422 INFO L87 Difference]: Start difference. First operand 293 states and 294 transitions. Second operand 79 states. [2018-10-01 00:51:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:51:26,429 INFO L93 Difference]: Finished difference Result 300 states and 302 transitions. [2018-10-01 00:51:26,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-10-01 00:51:26,429 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 292 [2018-10-01 00:51:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:51:26,430 INFO L225 Difference]: With dead ends: 300 [2018-10-01 00:51:26,430 INFO L226 Difference]: Without dead ends: 298 [2018-10-01 00:51:26,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 360 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-10-01 00:51:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-10-01 00:51:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2018-10-01 00:51:26,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-10-01 00:51:26,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 298 transitions. [2018-10-01 00:51:26,498 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 298 transitions. Word has length 292 [2018-10-01 00:51:26,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:51:26,499 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 298 transitions. [2018-10-01 00:51:26,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-01 00:51:26,499 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 298 transitions. [2018-10-01 00:51:26,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-10-01 00:51:26,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:51:26,500 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 73, 72, 1, 1, 1, 1] [2018-10-01 00:51:26,500 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:51:26,500 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:51:26,500 INFO L82 PathProgramCache]: Analyzing trace with hash -589956109, now seen corresponding path program 107 times [2018-10-01 00:51:26,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:51:26,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:51:26,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:26,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:51:26,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:51:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 10658 backedges. 5402 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:28,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:51:28,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:51:28,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:51:28,979 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) [2018-10-01 00:51:28,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:51:28,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:51:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10658 backedges. 5402 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:31,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:51:31,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 220 [2018-10-01 00:51:31,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 221 states [2018-10-01 00:51:31,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2018-10-01 00:51:31,424 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:51:31,424 INFO L87 Difference]: Start difference. First operand 297 states and 298 transitions. Second operand 221 states. [2018-10-01 00:51:41,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:51:41,108 INFO L93 Difference]: Finished difference Result 449 states and 451 transitions. [2018-10-01 00:51:41,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-10-01 00:51:41,108 INFO L78 Accepts]: Start accepts. Automaton has 221 states. Word has length 296 [2018-10-01 00:51:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:51:41,109 INFO L225 Difference]: With dead ends: 449 [2018-10-01 00:51:41,109 INFO L226 Difference]: Without dead ends: 299 [2018-10-01 00:51:41,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s Time [2018-10-01 00:51:41,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-10-01 00:51:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-10-01 00:51:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-10-01 00:51:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2018-10-01 00:51:41,170 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 296 [2018-10-01 00:51:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:51:41,170 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2018-10-01 00:51:41,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 221 states. [2018-10-01 00:51:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2018-10-01 00:51:41,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-10-01 00:51:41,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:51:41,171 INFO L375 BasicCegarLoop]: trace histogram [74, 74, 73, 73, 1, 1, 1, 1] [2018-10-01 00:51:41,171 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:51:41,172 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:51:41,172 INFO L82 PathProgramCache]: Analyzing trace with hash 294894319, now seen corresponding path program 108 times [2018-10-01 00:51:41,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:51:41,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:51:41,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:41,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:51:41,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:41,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:51:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5402 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:43,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:51:43,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:51:43,043 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:51:43,545 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-10-01 00:51:43,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:51:43,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:51:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10804 backedges. 5402 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:46,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:51:46,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 221 [2018-10-01 00:51:46,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-10-01 00:51:46,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-10-01 00:51:46,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:51:46,024 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand 222 states. [2018-10-01 00:51:55,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:51:55,711 INFO L93 Difference]: Finished difference Result 451 states and 453 transitions. [2018-10-01 00:51:55,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-01 00:51:55,711 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 298 [2018-10-01 00:51:55,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:51:55,712 INFO L225 Difference]: With dead ends: 451 [2018-10-01 00:51:55,712 INFO L226 Difference]: Without dead ends: 301 [2018-10-01 00:51:55,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s Time [2018-10-01 00:51:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-10-01 00:51:55,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-10-01 00:51:55,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-10-01 00:51:55,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 302 transitions. [2018-10-01 00:51:55,773 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 302 transitions. Word has length 298 [2018-10-01 00:51:55,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:51:55,773 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 302 transitions. [2018-10-01 00:51:55,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-10-01 00:51:55,774 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 302 transitions. [2018-10-01 00:51:55,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-10-01 00:51:55,775 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:51:55,775 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 74, 73, 1, 1, 1, 1] [2018-10-01 00:51:55,775 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:51:55,775 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:51:55,775 INFO L82 PathProgramCache]: Analyzing trace with hash 232631019, now seen corresponding path program 109 times [2018-10-01 00:51:55,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:51:55,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:51:55,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:55,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:51:55,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:51:55,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:51:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10952 backedges. 5550 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:56,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:51:56,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:51:56,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:51:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:51:57,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:51:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 10952 backedges. 5550 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:51:57,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:51:57,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 80 [2018-10-01 00:51:57,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-01 00:51:57,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-01 00:51:57,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:51:57,671 INFO L87 Difference]: Start difference. First operand 301 states and 302 transitions. Second operand 81 states. [2018-10-01 00:52:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:52:01,827 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2018-10-01 00:52:01,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-10-01 00:52:01,827 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 300 [2018-10-01 00:52:01,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:52:01,828 INFO L225 Difference]: With dead ends: 308 [2018-10-01 00:52:01,828 INFO L226 Difference]: Without dead ends: 306 [2018-10-01 00:52:01,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-10-01 00:52:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2018-10-01 00:52:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2018-10-01 00:52:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2018-10-01 00:52:01,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2018-10-01 00:52:01,897 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 300 [2018-10-01 00:52:01,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:52:01,897 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2018-10-01 00:52:01,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-01 00:52:01,898 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2018-10-01 00:52:01,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2018-10-01 00:52:01,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:52:01,899 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 75, 74, 1, 1, 1, 1] [2018-10-01 00:52:01,899 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:52:01,899 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:52:01,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1122541535, now seen corresponding path program 110 times [2018-10-01 00:52:01,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:52:01,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:52:01,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:01,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:52:01,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:52:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 11250 backedges. 5700 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:03,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:52:03,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:52:03,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:52:04,102 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:52:04,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:52:04,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:52:06,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11250 backedges. 5698 proven. 5550 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:52:06,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:52:06,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 150] total 225 [2018-10-01 00:52:06,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 226 states [2018-10-01 00:52:06,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2018-10-01 00:52:06,639 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:52:06,640 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand 226 states. [2018-10-01 00:52:17,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:52:17,207 INFO L93 Difference]: Finished difference Result 461 states and 463 transitions. [2018-10-01 00:52:17,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-10-01 00:52:17,207 INFO L78 Accepts]: Start accepts. Automaton has 226 states. Word has length 304 [2018-10-01 00:52:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:52:17,208 INFO L225 Difference]: With dead ends: 461 [2018-10-01 00:52:17,208 INFO L226 Difference]: Without dead ends: 307 [2018-10-01 00:52:17,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s Time [2018-10-01 00:52:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2018-10-01 00:52:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2018-10-01 00:52:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2018-10-01 00:52:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2018-10-01 00:52:17,271 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 304 [2018-10-01 00:52:17,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:52:17,271 INFO L480 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2018-10-01 00:52:17,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 226 states. [2018-10-01 00:52:17,271 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2018-10-01 00:52:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2018-10-01 00:52:17,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:52:17,272 INFO L375 BasicCegarLoop]: trace histogram [76, 76, 75, 75, 1, 1, 1, 1] [2018-10-01 00:52:17,272 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:52:17,272 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:52:17,272 INFO L82 PathProgramCache]: Analyzing trace with hash 677749467, now seen corresponding path program 111 times [2018-10-01 00:52:17,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:52:17,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:52:17,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:17,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:52:17,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:52:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5700 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:19,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:52:19,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:52:19,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:52:19,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-01 00:52:19,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:52:19,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:52:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 11400 backedges. 5700 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:22,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:52:22,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 227 [2018-10-01 00:52:22,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 228 states [2018-10-01 00:52:22,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2018-10-01 00:52:22,328 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:52:22,328 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 228 states. [2018-10-01 00:52:33,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:52:33,026 INFO L93 Difference]: Finished difference Result 463 states and 465 transitions. [2018-10-01 00:52:33,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-10-01 00:52:33,026 INFO L78 Accepts]: Start accepts. Automaton has 228 states. Word has length 306 [2018-10-01 00:52:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:52:33,027 INFO L225 Difference]: With dead ends: 463 [2018-10-01 00:52:33,027 INFO L226 Difference]: Without dead ends: 309 [2018-10-01 00:52:33,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s Time [2018-10-01 00:52:33,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-10-01 00:52:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2018-10-01 00:52:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2018-10-01 00:52:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2018-10-01 00:52:33,088 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 306 [2018-10-01 00:52:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:52:33,089 INFO L480 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2018-10-01 00:52:33,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 228 states. [2018-10-01 00:52:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2018-10-01 00:52:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2018-10-01 00:52:33,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:52:33,090 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 76, 75, 1, 1, 1, 1] [2018-10-01 00:52:33,090 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:52:33,090 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:52:33,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1565665577, now seen corresponding path program 112 times [2018-10-01 00:52:33,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:52:33,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:52:33,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:33,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:52:33,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:33,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:52:34,140 INFO L134 CoverageAnalysis]: Checked inductivity of 11552 backedges. 5852 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:34,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:52:34,140 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:52:34,147 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:52:34,400 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:52:34,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:52:34,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:52:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11552 backedges. 5852 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:35,003 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:52:35,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 82 [2018-10-01 00:52:35,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-01 00:52:35,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-01 00:52:35,005 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:52:35,005 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand 83 states. [2018-10-01 00:52:39,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:52:39,109 INFO L93 Difference]: Finished difference Result 316 states and 318 transitions. [2018-10-01 00:52:39,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-10-01 00:52:39,110 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 308 [2018-10-01 00:52:39,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:52:39,110 INFO L225 Difference]: With dead ends: 316 [2018-10-01 00:52:39,110 INFO L226 Difference]: Without dead ends: 314 [2018-10-01 00:52:39,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 380 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-10-01 00:52:39,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2018-10-01 00:52:39,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2018-10-01 00:52:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-10-01 00:52:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2018-10-01 00:52:39,172 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 308 [2018-10-01 00:52:39,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:52:39,172 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2018-10-01 00:52:39,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-01 00:52:39,172 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2018-10-01 00:52:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-10-01 00:52:39,173 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:52:39,173 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 77, 76, 1, 1, 1, 1] [2018-10-01 00:52:39,174 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:52:39,174 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:52:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1521022411, now seen corresponding path program 113 times [2018-10-01 00:52:39,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:52:39,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:52:39,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:39,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:52:39,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:39,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:52:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11858 backedges. 6006 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:41,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:52:41,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:52:41,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:52:41,623 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-01 00:52:41,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:52:41,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:52:44,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11858 backedges. 6006 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:44,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:52:44,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 232 [2018-10-01 00:52:44,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 233 states [2018-10-01 00:52:44,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 233 interpolants. [2018-10-01 00:52:44,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:52:44,168 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 233 states. [2018-10-01 00:52:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:52:54,941 INFO L93 Difference]: Finished difference Result 473 states and 475 transitions. [2018-10-01 00:52:54,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-10-01 00:52:54,941 INFO L78 Accepts]: Start accepts. Automaton has 233 states. Word has length 312 [2018-10-01 00:52:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:52:54,942 INFO L225 Difference]: With dead ends: 473 [2018-10-01 00:52:54,942 INFO L226 Difference]: Without dead ends: 315 [2018-10-01 00:52:54,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4s Time [2018-10-01 00:52:54,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-01 00:52:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2018-10-01 00:52:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-10-01 00:52:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 316 transitions. [2018-10-01 00:52:55,005 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 316 transitions. Word has length 312 [2018-10-01 00:52:55,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:52:55,005 INFO L480 AbstractCegarLoop]: Abstraction has 315 states and 316 transitions. [2018-10-01 00:52:55,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 233 states. [2018-10-01 00:52:55,005 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 316 transitions. [2018-10-01 00:52:55,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2018-10-01 00:52:55,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:52:55,006 INFO L375 BasicCegarLoop]: trace histogram [78, 78, 77, 77, 1, 1, 1, 1] [2018-10-01 00:52:55,007 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:52:55,007 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:52:55,007 INFO L82 PathProgramCache]: Analyzing trace with hash -278840121, now seen corresponding path program 114 times [2018-10-01 00:52:55,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:52:55,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:52:55,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:55,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:52:55,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:52:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:52:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6006 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:52:56,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:52:56,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:52:56,993 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:52:57,577 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2018-10-01 00:52:57,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:52:57,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:53:00,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6006 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:00,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:53:00,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 233 [2018-10-01 00:53:00,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 234 states [2018-10-01 00:53:00,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 234 interpolants. [2018-10-01 00:53:00,130 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:53:00,130 INFO L87 Difference]: Start difference. First operand 315 states and 316 transitions. Second operand 234 states. [2018-10-01 00:53:11,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:53:11,552 INFO L93 Difference]: Finished difference Result 475 states and 477 transitions. [2018-10-01 00:53:11,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-10-01 00:53:11,552 INFO L78 Accepts]: Start accepts. Automaton has 234 states. Word has length 314 [2018-10-01 00:53:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:53:11,553 INFO L225 Difference]: With dead ends: 475 [2018-10-01 00:53:11,553 INFO L226 Difference]: Without dead ends: 317 [2018-10-01 00:53:11,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s Time [2018-10-01 00:53:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2018-10-01 00:53:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2018-10-01 00:53:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-10-01 00:53:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 318 transitions. [2018-10-01 00:53:11,618 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 318 transitions. Word has length 314 [2018-10-01 00:53:11,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:53:11,619 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 318 transitions. [2018-10-01 00:53:11,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 234 states. [2018-10-01 00:53:11,619 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 318 transitions. [2018-10-01 00:53:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-01 00:53:11,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:53:11,620 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 78, 77, 1, 1, 1, 1] [2018-10-01 00:53:11,620 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:53:11,620 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:53:11,620 INFO L82 PathProgramCache]: Analyzing trace with hash 925086915, now seen corresponding path program 115 times [2018-10-01 00:53:11,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:53:11,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:53:11,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:11,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:53:11,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:53:12,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12168 backedges. 6162 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:12,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:53:12,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:53:12,717 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:53:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:53:12,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:53:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12168 backedges. 6162 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:13,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:53:13,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 84 [2018-10-01 00:53:13,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-01 00:53:13,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-01 00:53:13,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:53:13,576 INFO L87 Difference]: Start difference. First operand 317 states and 318 transitions. Second operand 85 states. [2018-10-01 00:53:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:53:17,427 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2018-10-01 00:53:17,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-10-01 00:53:17,427 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 316 [2018-10-01 00:53:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:53:17,428 INFO L225 Difference]: With dead ends: 324 [2018-10-01 00:53:17,428 INFO L226 Difference]: Without dead ends: 322 [2018-10-01 00:53:17,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time [2018-10-01 00:53:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-10-01 00:53:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2018-10-01 00:53:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2018-10-01 00:53:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 322 transitions. [2018-10-01 00:53:17,497 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 322 transitions. Word has length 316 [2018-10-01 00:53:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:53:17,498 INFO L480 AbstractCegarLoop]: Abstraction has 321 states and 322 transitions. [2018-10-01 00:53:17,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-01 00:53:17,498 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 322 transitions. [2018-10-01 00:53:17,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2018-10-01 00:53:17,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:53:17,499 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 79, 78, 1, 1, 1, 1] [2018-10-01 00:53:17,499 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:53:17,499 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:53:17,499 INFO L82 PathProgramCache]: Analyzing trace with hash -471466569, now seen corresponding path program 116 times [2018-10-01 00:53:17,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:53:17,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:53:17,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:17,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:53:17,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:53:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12482 backedges. 6320 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:19,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:53:19,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:53:19,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:53:19,906 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:53:19,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:53:19,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:53:22,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12482 backedges. 6318 proven. 6162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:53:22,442 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:53:22,442 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 158] total 237 [2018-10-01 00:53:22,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 238 states [2018-10-01 00:53:22,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 238 interpolants. [2018-10-01 00:53:22,444 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:53:22,445 INFO L87 Difference]: Start difference. First operand 321 states and 322 transitions. Second operand 238 states. [2018-10-01 00:53:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:53:33,715 INFO L93 Difference]: Finished difference Result 485 states and 487 transitions. [2018-10-01 00:53:33,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-10-01 00:53:33,715 INFO L78 Accepts]: Start accepts. Automaton has 238 states. Word has length 320 [2018-10-01 00:53:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:53:33,716 INFO L225 Difference]: With dead ends: 485 [2018-10-01 00:53:33,716 INFO L226 Difference]: Without dead ends: 323 [2018-10-01 00:53:33,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s Time [2018-10-01 00:53:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-10-01 00:53:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-10-01 00:53:33,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-10-01 00:53:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 324 transitions. [2018-10-01 00:53:33,783 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 324 transitions. Word has length 320 [2018-10-01 00:53:33,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:53:33,783 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 324 transitions. [2018-10-01 00:53:33,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 238 states. [2018-10-01 00:53:33,783 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 324 transitions. [2018-10-01 00:53:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-10-01 00:53:33,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:53:33,785 INFO L375 BasicCegarLoop]: trace histogram [80, 80, 79, 79, 1, 1, 1, 1] [2018-10-01 00:53:33,785 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:53:33,785 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:53:33,785 INFO L82 PathProgramCache]: Analyzing trace with hash -363493197, now seen corresponding path program 117 times [2018-10-01 00:53:33,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:53:33,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:53:33,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:33,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:53:33,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:53:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 6320 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:35,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:53:35,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:53:35,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:53:36,497 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 80 check-sat command(s) [2018-10-01 00:53:36,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:53:36,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:53:39,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 6320 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:39,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:53:39,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160] total 239 [2018-10-01 00:53:39,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 240 states [2018-10-01 00:53:39,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 240 interpolants. [2018-10-01 00:53:39,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:53:39,223 INFO L87 Difference]: Start difference. First operand 323 states and 324 transitions. Second operand 240 states. [2018-10-01 00:53:50,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:53:50,111 INFO L93 Difference]: Finished difference Result 487 states and 489 transitions. [2018-10-01 00:53:50,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-10-01 00:53:50,112 INFO L78 Accepts]: Start accepts. Automaton has 240 states. Word has length 322 [2018-10-01 00:53:50,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:53:50,112 INFO L225 Difference]: With dead ends: 487 [2018-10-01 00:53:50,112 INFO L226 Difference]: Without dead ends: 325 [2018-10-01 00:53:50,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s Time [2018-10-01 00:53:50,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2018-10-01 00:53:50,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2018-10-01 00:53:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2018-10-01 00:53:50,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2018-10-01 00:53:50,186 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 322 [2018-10-01 00:53:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:53:50,187 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2018-10-01 00:53:50,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 240 states. [2018-10-01 00:53:50,187 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2018-10-01 00:53:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2018-10-01 00:53:50,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:53:50,188 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 80, 79, 1, 1, 1, 1] [2018-10-01 00:53:50,189 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:53:50,189 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:53:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash 319702191, now seen corresponding path program 118 times [2018-10-01 00:53:50,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:53:50,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:53:50,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:50,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:53:50,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:53:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12800 backedges. 6480 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:51,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:53:51,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:53:51,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:53:51,596 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:53:51,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:53:51,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:53:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12800 backedges. 6480 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:52,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:53:52,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 86 [2018-10-01 00:53:52,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-01 00:53:52,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-01 00:53:52,264 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:53:52,264 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 87 states. [2018-10-01 00:53:56,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:53:56,634 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2018-10-01 00:53:56,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-10-01 00:53:56,634 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 324 [2018-10-01 00:53:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:53:56,635 INFO L225 Difference]: With dead ends: 332 [2018-10-01 00:53:56,635 INFO L226 Difference]: Without dead ends: 330 [2018-10-01 00:53:56,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 400 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-10-01 00:53:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2018-10-01 00:53:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2018-10-01 00:53:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2018-10-01 00:53:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 330 transitions. [2018-10-01 00:53:56,706 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 330 transitions. Word has length 324 [2018-10-01 00:53:56,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:53:56,706 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 330 transitions. [2018-10-01 00:53:56,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-01 00:53:56,707 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 330 transitions. [2018-10-01 00:53:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2018-10-01 00:53:56,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:53:56,708 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 81, 80, 1, 1, 1, 1] [2018-10-01 00:53:56,708 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:53:56,708 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:53:56,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1494304861, now seen corresponding path program 119 times [2018-10-01 00:53:56,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:53:56,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:53:56,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:56,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:53:56,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:53:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:53:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 13122 backedges. 6642 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:53:58,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:53:58,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:53:58,879 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:53:59,509 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-10-01 00:53:59,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:53:59,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:54:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13122 backedges. 6642 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:54:02,162 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:54:02,162 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163] total 244 [2018-10-01 00:54:02,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 245 states [2018-10-01 00:54:02,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2018-10-01 00:54:02,165 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:54:02,165 INFO L87 Difference]: Start difference. First operand 329 states and 330 transitions. Second operand 245 states. [2018-10-01 00:54:11,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:54:11,498 INFO L93 Difference]: Finished difference Result 497 states and 499 transitions. [2018-10-01 00:54:11,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-10-01 00:54:11,499 INFO L78 Accepts]: Start accepts. Automaton has 245 states. Word has length 328 [2018-10-01 00:54:11,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:54:11,499 INFO L225 Difference]: With dead ends: 497 [2018-10-01 00:54:11,499 INFO L226 Difference]: Without dead ends: 331 [2018-10-01 00:54:11,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s Time [2018-10-01 00:54:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2018-10-01 00:54:11,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2018-10-01 00:54:11,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2018-10-01 00:54:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2018-10-01 00:54:11,572 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 328 [2018-10-01 00:54:11,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:54:11,572 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2018-10-01 00:54:11,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 245 states. [2018-10-01 00:54:11,572 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2018-10-01 00:54:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2018-10-01 00:54:11,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:54:11,573 INFO L375 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 1, 1, 1, 1] [2018-10-01 00:54:11,573 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:54:11,573 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:54:11,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1517189473, now seen corresponding path program 120 times [2018-10-01 00:54:11,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:54:11,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:54:11,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:11,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:54:11,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:54:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 6642 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:54:13,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:54:13,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:54:13,696 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:54:14,321 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2018-10-01 00:54:14,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:54:14,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:54:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13284 backedges. 6642 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:54:17,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:54:17,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 164] total 245 [2018-10-01 00:54:17,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 246 states [2018-10-01 00:54:17,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 246 interpolants. [2018-10-01 00:54:17,011 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:54:17,012 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 246 states. [2018-10-01 00:54:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:54:24,887 INFO L93 Difference]: Finished difference Result 499 states and 501 transitions. [2018-10-01 00:54:24,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-10-01 00:54:24,888 INFO L78 Accepts]: Start accepts. Automaton has 246 states. Word has length 330 [2018-10-01 00:54:24,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:54:24,889 INFO L225 Difference]: With dead ends: 499 [2018-10-01 00:54:24,889 INFO L226 Difference]: Without dead ends: 333 [2018-10-01 00:54:24,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s Time [2018-10-01 00:54:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-10-01 00:54:24,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2018-10-01 00:54:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-10-01 00:54:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 334 transitions. [2018-10-01 00:54:24,957 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 334 transitions. Word has length 330 [2018-10-01 00:54:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:54:24,957 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 334 transitions. [2018-10-01 00:54:24,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 246 states. [2018-10-01 00:54:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 334 transitions. [2018-10-01 00:54:24,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-10-01 00:54:24,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:54:24,958 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 82, 81, 1, 1, 1, 1] [2018-10-01 00:54:24,958 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:54:24,958 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:54:24,958 INFO L82 PathProgramCache]: Analyzing trace with hash -2034465125, now seen corresponding path program 121 times [2018-10-01 00:54:24,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:54:24,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:54:24,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:24,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:54:24,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:54:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13448 backedges. 6806 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:54:26,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:54:26,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:54:26,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:54:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:54:26,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:54:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 13448 backedges. 6806 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:54:27,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:54:27,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 88 [2018-10-01 00:54:27,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-01 00:54:27,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-01 00:54:27,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:54:27,085 INFO L87 Difference]: Start difference. First operand 333 states and 334 transitions. Second operand 89 states. [2018-10-01 00:54:31,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:54:31,472 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2018-10-01 00:54:31,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-10-01 00:54:31,472 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 332 [2018-10-01 00:54:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:54:31,473 INFO L225 Difference]: With dead ends: 340 [2018-10-01 00:54:31,473 INFO L226 Difference]: Without dead ends: 338 [2018-10-01 00:54:31,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 410 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time [2018-10-01 00:54:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-10-01 00:54:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 337. [2018-10-01 00:54:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2018-10-01 00:54:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 338 transitions. [2018-10-01 00:54:31,550 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 338 transitions. Word has length 332 [2018-10-01 00:54:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:54:31,550 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 338 transitions. [2018-10-01 00:54:31,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-01 00:54:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 338 transitions. [2018-10-01 00:54:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2018-10-01 00:54:31,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:54:31,552 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 83, 82, 1, 1, 1, 1] [2018-10-01 00:54:31,552 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:54:31,552 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:54:31,552 INFO L82 PathProgramCache]: Analyzing trace with hash 881992591, now seen corresponding path program 122 times [2018-10-01 00:54:31,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:54:31,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:54:31,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:31,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:54:31,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:54:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13778 backedges. 6972 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:54:33,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:54:33,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:54:33,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:54:34,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:54:34,234 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:54:34,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:54:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13778 backedges. 6970 proven. 6806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-10-01 00:54:37,231 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:54:37,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 166] total 249 [2018-10-01 00:54:37,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 250 states [2018-10-01 00:54:37,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 250 interpolants. [2018-10-01 00:54:37,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:54:37,235 INFO L87 Difference]: Start difference. First operand 337 states and 338 transitions. Second operand 250 states. [2018-10-01 00:54:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:54:47,477 INFO L93 Difference]: Finished difference Result 509 states and 511 transitions. [2018-10-01 00:54:47,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-10-01 00:54:47,477 INFO L78 Accepts]: Start accepts. Automaton has 250 states. Word has length 336 [2018-10-01 00:54:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:54:47,478 INFO L225 Difference]: With dead ends: 509 [2018-10-01 00:54:47,478 INFO L226 Difference]: Without dead ends: 339 [2018-10-01 00:54:47,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8s Time [2018-10-01 00:54:47,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-01 00:54:47,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2018-10-01 00:54:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2018-10-01 00:54:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 340 transitions. [2018-10-01 00:54:47,554 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 340 transitions. Word has length 336 [2018-10-01 00:54:47,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:54:47,554 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 340 transitions. [2018-10-01 00:54:47,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 250 states. [2018-10-01 00:54:47,554 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 340 transitions. [2018-10-01 00:54:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2018-10-01 00:54:47,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:54:47,555 INFO L375 BasicCegarLoop]: trace histogram [84, 84, 83, 83, 1, 1, 1, 1] [2018-10-01 00:54:47,555 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:54:47,555 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:54:47,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1977890443, now seen corresponding path program 123 times [2018-10-01 00:54:47,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:54:47,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:54:47,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:47,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:54:47,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:54:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:54:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 6972 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:54:49,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:54:49,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:54:49,686 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:54:50,418 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2018-10-01 00:54:50,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:54:50,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:54:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13944 backedges. 6972 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:54:53,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:54:53,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168, 168] total 251 [2018-10-01 00:54:53,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 252 states [2018-10-01 00:54:53,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 252 interpolants. [2018-10-01 00:54:53,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:54:53,064 INFO L87 Difference]: Start difference. First operand 339 states and 340 transitions. Second operand 252 states. [2018-10-01 00:55:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:55:03,221 INFO L93 Difference]: Finished difference Result 511 states and 513 transitions. [2018-10-01 00:55:03,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-10-01 00:55:03,221 INFO L78 Accepts]: Start accepts. Automaton has 252 states. Word has length 338 [2018-10-01 00:55:03,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:55:03,222 INFO L225 Difference]: With dead ends: 511 [2018-10-01 00:55:03,222 INFO L226 Difference]: Without dead ends: 341 [2018-10-01 00:55:03,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0s Time [2018-10-01 00:55:03,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2018-10-01 00:55:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2018-10-01 00:55:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-10-01 00:55:03,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 342 transitions. [2018-10-01 00:55:03,358 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 342 transitions. Word has length 338 [2018-10-01 00:55:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:55:03,358 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 342 transitions. [2018-10-01 00:55:03,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has 252 states. [2018-10-01 00:55:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 342 transitions. [2018-10-01 00:55:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-01 00:55:03,360 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:55:03,360 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 84, 83, 1, 1, 1, 1] [2018-10-01 00:55:03,360 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:55:03,360 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:55:03,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1426228601, now seen corresponding path program 124 times [2018-10-01 00:55:03,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:55:03,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:55:03,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:55:03,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:55:03,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:55:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:55:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 14112 backedges. 7140 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:55:04,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:55:04,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:55:04,617 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:55:04,900 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:55:04,901 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:55:04,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:55:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14112 backedges. 7140 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:55:05,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:55:05,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 90 [2018-10-01 00:55:05,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-01 00:55:05,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-01 00:55:05,848 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:55:05,848 INFO L87 Difference]: Start difference. First operand 341 states and 342 transitions. Second operand 91 states. [2018-10-01 00:55:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:55:10,169 INFO L93 Difference]: Finished difference Result 348 states and 350 transitions. [2018-10-01 00:55:10,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-10-01 00:55:10,169 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 340 [2018-10-01 00:55:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:55:10,170 INFO L225 Difference]: With dead ends: 348 [2018-10-01 00:55:10,170 INFO L226 Difference]: Without dead ends: 346 [2018-10-01 00:55:10,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 420 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time [2018-10-01 00:55:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2018-10-01 00:55:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2018-10-01 00:55:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2018-10-01 00:55:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 346 transitions. [2018-10-01 00:55:10,250 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 346 transitions. Word has length 340 [2018-10-01 00:55:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:55:10,250 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 346 transitions. [2018-10-01 00:55:10,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-01 00:55:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 346 transitions. [2018-10-01 00:55:10,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2018-10-01 00:55:10,252 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:55:10,252 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 85, 84, 1, 1, 1, 1] [2018-10-01 00:55:10,252 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:55:10,253 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:55:10,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1507901061, now seen corresponding path program 125 times [2018-10-01 00:55:10,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:55:10,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:55:10,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:55:10,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:55:10,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:55:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:55:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 14450 backedges. 7310 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:55:12,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:55:12,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:55:12,737 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:55:13,491 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 86 check-sat command(s) [2018-10-01 00:55:13,491 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:55:13,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:55:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14450 backedges. 7310 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:55:16,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:55:16,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171, 171] total 256 [2018-10-01 00:55:16,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 257 states [2018-10-01 00:55:16,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 257 interpolants. [2018-10-01 00:55:16,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:55:16,577 INFO L87 Difference]: Start difference. First operand 345 states and 346 transitions. Second operand 257 states. Received shutdown request... [2018-10-01 00:55:21,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-10-01 00:55:21,421 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 00:55:21,427 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 00:55:21,427 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 12:55:21 BoogieIcfgContainer [2018-10-01 00:55:21,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 00:55:21,429 INFO L168 Benchmark]: Toolchain (without parser) took 778267.72 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 481.3 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 201.0 MB). Peak memory consumption was 682.3 MB. Max. memory is 7.1 GB. [2018-10-01 00:55:21,430 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 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. [2018-10-01 00:55:21,431 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.64 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. [2018-10-01 00:55:21,431 INFO L168 Benchmark]: Boogie Preprocessor took 23.32 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. [2018-10-01 00:55:21,432 INFO L168 Benchmark]: RCFGBuilder took 338.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 00:55:21,432 INFO L168 Benchmark]: TraceAbstraction took 777861.34 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 481.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 179.9 MB). Peak memory consumption was 661.2 MB. Max. memory is 7.1 GB. [2018-10-01 00:55:21,435 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 0.25 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 36.64 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 23.32 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 338.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 777861.34 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 481.3 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 179.9 MB). Peak memory consumption was 661.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 75). Cancelled while BasicCegarLoop was constructing difference of abstraction (345states) and FLOYD_HOARE automaton (currently 116 states, 257 states before enhancement), while ReachableStatesComputation was computing reachable states (284 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 777.7s OverallTime, 127 OverallIterations, 86 TraceHistogramMax, 495.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 5869 SDtfs, 4645 SDslu, 77549 SDs, 0 SdLazy, 82571 SolverSat, 11807 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 108.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38574 GetRequests, 20355 SyntacticMatches, 11 SemanticMatches, 18208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 343.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=345occurred in iteration=126, 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: 3.8s AutomataMinimizationTime, 126 MinimizatonAttempts, 42 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 3.1s SsaConstructionTime, 31.5s SatisfiabilityAnalysisTime, 234.9s InterpolantComputationTime, 44506 NumberOfCodeBlocks, 44506 NumberOfCodeBlocksAsserted, 3002 NumberOfCheckSat, 44254 ConstructedInterpolants, 0 QuantifiedInterpolants, 40280425 SizeOfPredicates, 397 NumberOfNonLiveVariables, 121353 ConjunctsInSsa, 11406 ConjunctsInUnsatCore, 252 InterpolantComputations, 2 PerfectInterpolantSequences, 625022/1235446 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/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_00-55-21-448.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_00-55-21-448.csv Completed graceful shutdown