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/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 09:07:39,123 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 09:07:39,125 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 09:07:39,143 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-03 09:07:39,197 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-03 09:07:39,226 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 09:07:39,227 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 09:07:39,228 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 09:07:39,228 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 09:07:39,231 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 09:07:39,231 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 09:07:39,231 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 09:07:39,232 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 09:07:39,232 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 09:07:39,232 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 09:07:39,232 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 09:07:39,233 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 09:07:39,234 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 09:07:39,234 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 09:07:39,234 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 09:07:39,234 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 09:07:39,234 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 09:07:39,235 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 09:07:39,235 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 09:07:39,235 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 09:07:39,235 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 09:07:39,236 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 09:07:39,237 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:07:39,237 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 09:07:39,237 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 09:07:39,237 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 09:07:39,237 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 09:07:39,238 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 09:07:39,238 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 09:07:39,238 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 09:07:39,238 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-03 09:07:39,303 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 09:07:39,319 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 09:07:39,325 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 09:07:39,327 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 09:07:39,327 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 09:07:39,328 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-10-03 09:07:39,328 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-10-03 09:07:39,395 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 09:07:39,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 09:07:39,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 09:07:39,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 09:07:39,399 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 09:07:39,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:07:39" (1/1) ... [2018-10-03 09:07:39,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:07:39" (1/1) ... [2018-10-03 09:07:39,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 09:07:39,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 09:07:39,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 09:07:39,441 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 09:07:39,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:07:39" (1/1) ... [2018-10-03 09:07:39,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:07:39" (1/1) ... [2018-10-03 09:07:39,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:07:39" (1/1) ... [2018-10-03 09:07:39,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:07:39" (1/1) ... [2018-10-03 09:07:39,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:07:39" (1/1) ... [2018-10-03 09:07:39,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:07:39" (1/1) ... [2018-10-03 09:07:39,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:07:39" (1/1) ... [2018-10-03 09:07:39,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 09:07:39,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 09:07:39,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 09:07:39,463 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 09:07:39,464 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:07:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 09:07:39,532 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-03 09:07:39,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 09:07:39,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 09:07:39,734 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 09:07:39,734 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:07:39 BoogieIcfgContainer [2018-10-03 09:07:39,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 09:07:39,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 09:07:39,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 09:07:39,739 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 09:07:39,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 09:07:39" (1/2) ... [2018-10-03 09:07:39,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bbf6cb9 and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 09:07:39, skipping insertion in model container [2018-10-03 09:07:39,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 09:07:39" (2/2) ... [2018-10-03 09:07:39,743 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-10-03 09:07:39,754 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 09:07:39,762 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 09:07:39,814 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 09:07:39,815 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 09:07:39,815 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 09:07:39,816 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 09:07:39,816 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 09:07:39,816 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 09:07:39,816 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 09:07:39,816 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 09:07:39,817 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 09:07:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-03 09:07:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-03 09:07:39,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:39,839 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-03 09:07:39,840 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:39,846 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:39,847 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-10-03 09:07:39,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:39,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:39,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:39,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:07:39,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:39,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:40,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:07:40,008 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:07:40,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 09:07:40,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 09:07:40,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 09:07:40,028 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:40,030 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-03 09:07:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:40,080 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-10-03 09:07:40,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 09:07:40,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-03 09:07:40,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:40,119 INFO L225 Difference]: With dead ends: 11 [2018-10-03 09:07:40,120 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 09:07:40,131 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-03 09:07:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 09:07:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-10-03 09:07:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 09:07:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-10-03 09:07:40,194 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-10-03 09:07:40,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:40,194 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-10-03 09:07:40,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 09:07:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-10-03 09:07:40,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 09:07:40,195 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:40,195 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-03 09:07:40,196 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:40,196 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:40,196 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-10-03 09:07:40,196 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:40,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:40,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:40,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:07:40,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:07:40,270 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 09:07:40,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 09:07:40,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 09:07:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 09:07:40,272 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:40,273 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-10-03 09:07:40,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:40,299 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-10-03 09:07:40,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 09:07:40,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-03 09:07:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:40,300 INFO L225 Difference]: With dead ends: 11 [2018-10-03 09:07:40,300 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 09:07:40,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-03 09:07:40,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 09:07:40,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 09:07:40,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 09:07:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-10-03 09:07:40,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-10-03 09:07:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:40,304 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-10-03 09:07:40,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 09:07:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-10-03 09:07:40,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 09:07:40,305 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:40,305 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-03 09:07:40,305 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:40,306 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:40,306 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-10-03 09:07:40,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:40,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:40,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:40,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:07:40,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:07:40,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:40,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:40,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:07:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:40,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:07:40,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:40,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 09:07:40,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 09:07:40,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 09:07:40,475 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:40,475 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-10-03 09:07:40,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:40,520 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-10-03 09:07:40,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 09:07:40,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-03 09:07:40,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:40,521 INFO L225 Difference]: With dead ends: 13 [2018-10-03 09:07:40,521 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 09:07:40,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 2 [2018-10-03 09:07:40,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 09:07:40,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 09:07:40,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 09:07:40,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-10-03 09:07:40,525 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-10-03 09:07:40,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:40,525 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-10-03 09:07:40,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 09:07:40,525 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-10-03 09:07:40,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 09:07:40,526 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:40,526 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-10-03 09:07:40,526 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:40,527 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:40,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-10-03 09:07:40,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:40,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:40,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:40,529 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:07:40,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-03 09:07:40,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:40,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:40,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:07:40,627 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:07:40,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:40,629 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 09:07:40,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:40,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2018-10-03 09:07:40,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 09:07:40,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 09:07:40,753 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:40,753 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 7 states. [2018-10-03 09:07:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:41,255 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2018-10-03 09:07:41,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 09:07:41,256 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-03 09:07:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:41,256 INFO L225 Difference]: With dead ends: 24 [2018-10-03 09:07:41,257 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 09:07:41,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 7 [2018-10-03 09:07:41,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 09:07:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-10-03 09:07:41,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 09:07:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-03 09:07:41,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-10-03 09:07:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:41,263 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-03 09:07:41,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 09:07:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-03 09:07:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 09:07:41,264 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:41,265 INFO L375 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-10-03 09:07:41,265 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:41,265 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:41,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 3 times [2018-10-03 09:07:41,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:41,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:41,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:41,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:41,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-03 09:07:41,345 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:41,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:41,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:07:41,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 09:07:41,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:41,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:41,414 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-03 09:07:41,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:41,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 09:07:41,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 09:07:41,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 09:07:41,436 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:41,436 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-10-03 09:07:41,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:41,595 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-10-03 09:07:41,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 09:07:41,596 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-03 09:07:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:41,597 INFO L225 Difference]: With dead ends: 24 [2018-10-03 09:07:41,597 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 09:07:41,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 4 [2018-10-03 09:07:41,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 09:07:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 09:07:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 09:07:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-03 09:07:41,602 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-10-03 09:07:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:41,602 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-03 09:07:41,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 09:07:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-03 09:07:41,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 09:07:41,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:41,603 INFO L375 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-10-03 09:07:41,603 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:41,604 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:41,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 4 times [2018-10-03 09:07:41,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:41,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:41,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:41,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:41,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-03 09:07:41,715 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:41,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:41,723 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:07:41,737 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:07:41,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:41,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-03 09:07:41,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:41,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2018-10-03 09:07:41,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 09:07:41,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 09:07:41,852 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:41,852 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 10 states. [2018-10-03 09:07:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:42,664 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2018-10-03 09:07:42,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 09:07:42,665 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-10-03 09:07:42,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:42,666 INFO L225 Difference]: With dead ends: 40 [2018-10-03 09:07:42,666 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 09:07:42,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 10 [2018-10-03 09:07:42,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 09:07:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-10-03 09:07:42,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 09:07:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-10-03 09:07:42,673 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-10-03 09:07:42,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:42,674 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-10-03 09:07:42,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 09:07:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-10-03 09:07:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 09:07:42,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:42,675 INFO L375 BasicCegarLoop]: trace histogram [15, 3, 3, 1, 1, 1] [2018-10-03 09:07:42,675 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:42,676 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:42,677 INFO L82 PathProgramCache]: Analyzing trace with hash 198739950, now seen corresponding path program 5 times [2018-10-03 09:07:42,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:42,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:42,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:42,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:42,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-03 09:07:42,812 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:42,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:42,820 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:07:42,887 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 09:07:42,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:42,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-10-03 09:07:43,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:43,093 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2018-10-03 09:07:43,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 09:07:43,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 09:07:43,094 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:43,094 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 12 states. [2018-10-03 09:07:43,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:43,612 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2018-10-03 09:07:43,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 09:07:43,614 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-10-03 09:07:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:43,615 INFO L225 Difference]: With dead ends: 60 [2018-10-03 09:07:43,615 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 09:07:43,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 12 [2018-10-03 09:07:43,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 09:07:43,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2018-10-03 09:07:43,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 09:07:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-10-03 09:07:43,625 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2018-10-03 09:07:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:43,625 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-10-03 09:07:43,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 09:07:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-10-03 09:07:43,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 09:07:43,626 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:43,627 INFO L375 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-10-03 09:07:43,627 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:43,627 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:43,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 6 times [2018-10-03 09:07:43,627 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:43,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:43,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:43,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:43,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-10-03 09:07:43,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:43,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:43,773 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:07:43,814 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 09:07:43,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:43,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-03 09:07:43,880 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:43,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 09:07:43,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 09:07:43,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 09:07:43,881 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:43,881 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-10-03 09:07:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:43,917 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-10-03 09:07:43,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 09:07:43,917 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-10-03 09:07:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:43,918 INFO L225 Difference]: With dead ends: 67 [2018-10-03 09:07:43,918 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 09:07:43,919 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-03 09:07:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 09:07:43,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 09:07:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 09:07:43,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-10-03 09:07:43,930 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-10-03 09:07:43,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:43,930 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-10-03 09:07:43,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 09:07:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-10-03 09:07:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-03 09:07:43,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:43,932 INFO L375 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-10-03 09:07:43,932 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:43,932 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:43,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 7 times [2018-10-03 09:07:43,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:43,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:43,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:43,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:43,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-03 09:07:44,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:44,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:44,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:07:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:44,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-10-03 09:07:44,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:44,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2018-10-03 09:07:44,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 09:07:44,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 09:07:44,331 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:44,331 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2018-10-03 09:07:45,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:45,376 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2018-10-03 09:07:45,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 09:07:45,378 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-10-03 09:07:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:45,378 INFO L225 Difference]: With dead ends: 93 [2018-10-03 09:07:45,379 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 09:07:45,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 15 [2018-10-03 09:07:45,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 09:07:45,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-10-03 09:07:45,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 09:07:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-10-03 09:07:45,391 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2018-10-03 09:07:45,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:45,392 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-10-03 09:07:45,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 09:07:45,392 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-10-03 09:07:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 09:07:45,393 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:45,394 INFO L375 BasicCegarLoop]: trace histogram [40, 5, 5, 1, 1, 1] [2018-10-03 09:07:45,394 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:45,394 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:45,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1154943019, now seen corresponding path program 8 times [2018-10-03 09:07:45,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:45,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:45,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:45,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:07:45,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 825 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-10-03 09:07:45,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:45,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:45,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:07:45,604 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:07:45,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:45,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-10-03 09:07:45,917 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:45,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2018-10-03 09:07:45,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:07:45,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:07:45,918 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:45,918 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2018-10-03 09:07:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:47,801 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2018-10-03 09:07:47,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 09:07:47,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-10-03 09:07:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:47,809 INFO L225 Difference]: With dead ends: 123 [2018-10-03 09:07:47,809 INFO L226 Difference]: Without dead ends: 80 [2018-10-03 09:07:47,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.4s impTime 17 [2018-10-03 09:07:47,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-03 09:07:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2018-10-03 09:07:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 09:07:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-10-03 09:07:47,834 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2018-10-03 09:07:47,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:47,837 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-10-03 09:07:47,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:07:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-10-03 09:07:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-03 09:07:47,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:47,839 INFO L375 BasicCegarLoop]: trace histogram [54, 6, 6, 1, 1, 1] [2018-10-03 09:07:47,839 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:47,839 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:47,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2076506525, now seen corresponding path program 9 times [2018-10-03 09:07:47,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:47,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:47,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:47,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:47,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-10-03 09:07:48,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:48,066 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:48,077 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:07:48,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 09:07:48,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:48,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-03 09:07:48,358 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:48,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2018-10-03 09:07:48,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 09:07:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 09:07:48,359 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:48,359 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2018-10-03 09:07:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:50,438 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2018-10-03 09:07:50,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 09:07:50,442 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2018-10-03 09:07:50,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:50,443 INFO L225 Difference]: With dead ends: 157 [2018-10-03 09:07:50,443 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 09:07:50,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.8s impTime 19 [2018-10-03 09:07:50,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 09:07:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-10-03 09:07:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-03 09:07:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2018-10-03 09:07:50,459 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 69 [2018-10-03 09:07:50,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:50,460 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2018-10-03 09:07:50,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 09:07:50,460 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2018-10-03 09:07:50,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-03 09:07:50,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:50,461 INFO L375 BasicCegarLoop]: trace histogram [70, 7, 7, 1, 1, 1] [2018-10-03 09:07:50,462 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:50,462 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:50,462 INFO L82 PathProgramCache]: Analyzing trace with hash -815084279, now seen corresponding path program 10 times [2018-10-03 09:07:50,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:50,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:50,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:50,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:50,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-10-03 09:07:50,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:50,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:50,620 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:07:50,689 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:07:50,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:50,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-10-03 09:07:51,068 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:51,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 09:07:51,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 09:07:51,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 09:07:51,069 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:51,069 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 10 states. [2018-10-03 09:07:51,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:51,117 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2018-10-03 09:07:51,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 09:07:51,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2018-10-03 09:07:51,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:51,118 INFO L225 Difference]: With dead ends: 113 [2018-10-03 09:07:51,119 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 09:07:51,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.0s impTime 8 [2018-10-03 09:07:51,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 09:07:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2018-10-03 09:07:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-03 09:07:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-10-03 09:07:51,142 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 87 [2018-10-03 09:07:51,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:51,142 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-10-03 09:07:51,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 09:07:51,142 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-10-03 09:07:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-03 09:07:51,144 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:51,144 INFO L375 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-10-03 09:07:51,144 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:51,145 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:51,145 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 11 times [2018-10-03 09:07:51,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:51,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:51,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:51,146 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:51,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-03 09:07:51,346 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:51,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:51,353 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:07:51,546 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-03 09:07:51,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:51,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-03 09:07:51,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:51,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 09:07:51,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 09:07:51,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 09:07:51,757 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:51,757 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-10-03 09:07:51,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:51,896 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-10-03 09:07:51,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 09:07:51,896 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-10-03 09:07:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:51,898 INFO L225 Difference]: With dead ends: 125 [2018-10-03 09:07:51,898 INFO L226 Difference]: Without dead ends: 123 [2018-10-03 09:07:51,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-03 09:07:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-03 09:07:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-10-03 09:07:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-03 09:07:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-10-03 09:07:51,924 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-10-03 09:07:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:51,924 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-10-03 09:07:51,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 09:07:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-10-03 09:07:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-03 09:07:51,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:51,927 INFO L375 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-10-03 09:07:51,927 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:51,927 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:51,928 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 12 times [2018-10-03 09:07:51,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:51,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:51,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:51,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:51,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-03 09:07:52,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:52,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:52,210 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:07:52,305 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-10-03 09:07:52,306 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:52,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-03 09:07:52,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:52,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 09:07:52,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 09:07:52,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 09:07:52,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:52,787 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-10-03 09:07:52,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:52,891 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-10-03 09:07:52,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 09:07:52,892 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-10-03 09:07:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:52,893 INFO L225 Difference]: With dead ends: 137 [2018-10-03 09:07:52,893 INFO L226 Difference]: Without dead ends: 135 [2018-10-03 09:07:52,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.0s impTime 10 [2018-10-03 09:07:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-03 09:07:52,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-10-03 09:07:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-03 09:07:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-10-03 09:07:52,914 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-10-03 09:07:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:52,914 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-10-03 09:07:52,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 09:07:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-10-03 09:07:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-03 09:07:52,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:52,916 INFO L375 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-10-03 09:07:52,917 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:52,917 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 13 times [2018-10-03 09:07:52,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:52,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:52,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:52,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:52,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-03 09:07:53,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:53,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:53,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:07:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:53,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-03 09:07:53,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:53,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 09:07:53,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 09:07:53,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 09:07:53,506 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:53,506 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-10-03 09:07:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:53,697 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-10-03 09:07:53,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 09:07:53,698 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-10-03 09:07:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:53,699 INFO L225 Difference]: With dead ends: 149 [2018-10-03 09:07:53,699 INFO L226 Difference]: Without dead ends: 147 [2018-10-03 09:07:53,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 11 [2018-10-03 09:07:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-03 09:07:53,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-10-03 09:07:53,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-03 09:07:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-10-03 09:07:53,719 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-10-03 09:07:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:53,720 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-10-03 09:07:53,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 09:07:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-10-03 09:07:53,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-03 09:07:53,722 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:53,722 INFO L375 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-10-03 09:07:53,722 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:53,723 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:53,723 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 14 times [2018-10-03 09:07:53,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:53,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:53,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:53,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:07:53,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-10-03 09:07:54,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:54,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:54,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:07:54,260 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:07:54,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:54,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-10-03 09:07:54,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:54,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 09:07:54,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 09:07:54,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 09:07:54,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:54,731 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-10-03 09:07:54,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:54,831 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-10-03 09:07:54,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 09:07:54,831 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-10-03 09:07:54,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:54,832 INFO L225 Difference]: With dead ends: 161 [2018-10-03 09:07:54,832 INFO L226 Difference]: Without dead ends: 159 [2018-10-03 09:07:54,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.2s impTime 12 [2018-10-03 09:07:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-03 09:07:54,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-10-03 09:07:54,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-03 09:07:54,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-10-03 09:07:54,854 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-10-03 09:07:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:54,854 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-10-03 09:07:54,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 09:07:54,854 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-10-03 09:07:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-03 09:07:54,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:54,856 INFO L375 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-10-03 09:07:54,856 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:54,856 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:54,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 15 times [2018-10-03 09:07:54,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:54,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:54,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:54,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:54,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-03 09:07:55,171 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:55,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:55,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:07:55,313 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-10-03 09:07:55,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:55,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:55,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-03 09:07:55,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:55,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 09:07:55,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 09:07:55,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 09:07:55,580 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:55,580 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-10-03 09:07:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:55,727 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-10-03 09:07:55,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 09:07:55,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-10-03 09:07:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:55,729 INFO L225 Difference]: With dead ends: 173 [2018-10-03 09:07:55,729 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 09:07:55,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 13 [2018-10-03 09:07:55,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 09:07:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-10-03 09:07:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-03 09:07:55,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-10-03 09:07:55,755 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-10-03 09:07:55,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:55,756 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-10-03 09:07:55,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 09:07:55,756 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-10-03 09:07:55,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-03 09:07:55,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:55,757 INFO L375 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-10-03 09:07:55,758 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:55,758 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:55,758 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 16 times [2018-10-03 09:07:55,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:55,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:55,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:55,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:55,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-10-03 09:07:56,055 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:56,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:56,065 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:07:56,158 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:07:56,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:56,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-10-03 09:07:56,508 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:56,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 09:07:56,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 09:07:56,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 09:07:56,509 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:56,509 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-10-03 09:07:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:56,630 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-10-03 09:07:56,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 09:07:56,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-10-03 09:07:56,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:56,632 INFO L225 Difference]: With dead ends: 185 [2018-10-03 09:07:56,632 INFO L226 Difference]: Without dead ends: 183 [2018-10-03 09:07:56,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 14 [2018-10-03 09:07:56,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-03 09:07:56,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-10-03 09:07:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-03 09:07:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-10-03 09:07:56,661 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-10-03 09:07:56,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:56,661 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-10-03 09:07:56,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 09:07:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-10-03 09:07:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-03 09:07:56,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:56,662 INFO L375 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-10-03 09:07:56,663 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:56,663 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:56,663 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 17 times [2018-10-03 09:07:56,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:56,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:56,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:56,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:56,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-03 09:07:57,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:57,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:57,123 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:07:57,329 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-10-03 09:07:57,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:07:57,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:07:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-03 09:07:57,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:07:57,693 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 09:07:57,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 09:07:57,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 09:07:57,694 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:07:57,694 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-10-03 09:07:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:07:57,828 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-10-03 09:07:57,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 09:07:57,828 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-10-03 09:07:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:07:57,829 INFO L225 Difference]: With dead ends: 197 [2018-10-03 09:07:57,829 INFO L226 Difference]: Without dead ends: 195 [2018-10-03 09:07:57,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 15 [2018-10-03 09:07:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-03 09:07:57,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-10-03 09:07:57,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-03 09:07:57,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-10-03 09:07:57,861 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-10-03 09:07:57,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:07:57,862 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-10-03 09:07:57,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 09:07:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-10-03 09:07:57,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-03 09:07:57,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:07:57,863 INFO L375 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-10-03 09:07:57,863 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:07:57,863 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:07:57,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 18 times [2018-10-03 09:07:57,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:07:57,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:07:57,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:57,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:07:57,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:07:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:07:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-10-03 09:07:58,882 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:07:58,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:07:58,889 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:07:59,997 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-10-03 09:07:59,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:00,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-10-03 09:08:00,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:00,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 09:08:00,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 09:08:00,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 09:08:00,313 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:00,313 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-10-03 09:08:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:00,419 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-10-03 09:08:00,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 09:08:00,419 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-10-03 09:08:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:00,421 INFO L225 Difference]: With dead ends: 209 [2018-10-03 09:08:00,421 INFO L226 Difference]: Without dead ends: 207 [2018-10-03 09:08:00,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 16 [2018-10-03 09:08:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-03 09:08:00,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-10-03 09:08:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-03 09:08:00,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-10-03 09:08:00,463 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-10-03 09:08:00,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:00,463 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-10-03 09:08:00,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 09:08:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-10-03 09:08:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-03 09:08:00,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:00,465 INFO L375 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-10-03 09:08:00,465 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:00,465 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:00,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 19 times [2018-10-03 09:08:00,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:00,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:00,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:00,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:00,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-03 09:08:01,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:01,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:01,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:08:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:01,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-03 09:08:01,587 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:01,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 09:08:01,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 09:08:01,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 09:08:01,587 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:01,588 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-10-03 09:08:01,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:01,702 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-10-03 09:08:01,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 09:08:01,702 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-10-03 09:08:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:01,704 INFO L225 Difference]: With dead ends: 221 [2018-10-03 09:08:01,704 INFO L226 Difference]: Without dead ends: 219 [2018-10-03 09:08:01,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 17 [2018-10-03 09:08:01,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-03 09:08:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-10-03 09:08:01,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-03 09:08:01,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-10-03 09:08:01,744 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-10-03 09:08:01,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:01,744 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-10-03 09:08:01,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 09:08:01,745 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-10-03 09:08:01,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-03 09:08:01,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:01,746 INFO L375 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-10-03 09:08:01,746 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:01,746 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:01,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 20 times [2018-10-03 09:08:01,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:01,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:01,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:01,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:08:01,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-10-03 09:08:02,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:02,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:02,958 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:08:03,069 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:08:03,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:03,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-10-03 09:08:03,435 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:03,435 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 09:08:03,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 09:08:03,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 09:08:03,436 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:03,436 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-10-03 09:08:03,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:03,576 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-10-03 09:08:03,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 09:08:03,578 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-10-03 09:08:03,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:03,580 INFO L225 Difference]: With dead ends: 233 [2018-10-03 09:08:03,580 INFO L226 Difference]: Without dead ends: 231 [2018-10-03 09:08:03,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 18 [2018-10-03 09:08:03,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-03 09:08:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-10-03 09:08:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-03 09:08:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-10-03 09:08:03,626 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-10-03 09:08:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:03,626 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-10-03 09:08:03,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 09:08:03,626 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-10-03 09:08:03,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-03 09:08:03,627 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:03,627 INFO L375 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-10-03 09:08:03,627 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:03,627 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:03,627 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 21 times [2018-10-03 09:08:03,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:03,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:03,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:03,628 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:03,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-03 09:08:04,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:04,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:04,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:08:04,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 109 check-sat command(s) [2018-10-03 09:08:04,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:04,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-03 09:08:04,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:04,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 09:08:04,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 09:08:04,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 09:08:04,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:04,951 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-10-03 09:08:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:05,100 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-10-03 09:08:05,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 09:08:05,100 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-10-03 09:08:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:05,101 INFO L225 Difference]: With dead ends: 245 [2018-10-03 09:08:05,102 INFO L226 Difference]: Without dead ends: 243 [2018-10-03 09:08:05,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.2s impTime 19 [2018-10-03 09:08:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-03 09:08:05,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-10-03 09:08:05,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-03 09:08:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-10-03 09:08:05,151 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-10-03 09:08:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:05,152 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-10-03 09:08:05,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 09:08:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-10-03 09:08:05,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-03 09:08:05,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:05,153 INFO L375 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-10-03 09:08:05,154 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:05,154 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:05,154 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 22 times [2018-10-03 09:08:05,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:05,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:05,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:05,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:05,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:05,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-10-03 09:08:06,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:06,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:06,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:08:06,459 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:08:06,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:06,464 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-10-03 09:08:06,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:06,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 09:08:06,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 09:08:06,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 09:08:06,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:06,844 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-10-03 09:08:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:07,003 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-10-03 09:08:07,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 09:08:07,005 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-10-03 09:08:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:07,006 INFO L225 Difference]: With dead ends: 257 [2018-10-03 09:08:07,007 INFO L226 Difference]: Without dead ends: 255 [2018-10-03 09:08:07,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.7s impTime 20 [2018-10-03 09:08:07,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-03 09:08:07,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-10-03 09:08:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-03 09:08:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-10-03 09:08:07,083 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-10-03 09:08:07,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:07,083 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-10-03 09:08:07,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 09:08:07,083 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-10-03 09:08:07,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-03 09:08:07,085 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:07,085 INFO L375 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-10-03 09:08:07,085 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:07,085 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:07,086 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 23 times [2018-10-03 09:08:07,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:07,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:07,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:07,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:07,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-10-03 09:08:07,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:07,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:07,672 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:08:07,947 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2018-10-03 09:08:07,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:07,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-10-03 09:08:08,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:08,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 09:08:08,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 09:08:08,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 09:08:08,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:08,404 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-10-03 09:08:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:08,573 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-10-03 09:08:08,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 09:08:08,574 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-10-03 09:08:08,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:08,575 INFO L225 Difference]: With dead ends: 269 [2018-10-03 09:08:08,575 INFO L226 Difference]: Without dead ends: 267 [2018-10-03 09:08:08,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.2s impTime 21 [2018-10-03 09:08:08,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-03 09:08:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-10-03 09:08:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-03 09:08:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-10-03 09:08:08,635 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-10-03 09:08:08,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:08,635 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-10-03 09:08:08,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 09:08:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-10-03 09:08:08,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-03 09:08:08,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:08,637 INFO L375 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-10-03 09:08:08,637 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:08,638 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:08,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 24 times [2018-10-03 09:08:08,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:08,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:08,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:08,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:08,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-10-03 09:08:09,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:09,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:09,100 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:08:09,421 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2018-10-03 09:08:09,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:09,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-10-03 09:08:10,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:10,222 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 09:08:10,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 09:08:10,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 09:08:10,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:10,223 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-10-03 09:08:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:10,892 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-10-03 09:08:10,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 09:08:10,892 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-10-03 09:08:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:10,894 INFO L225 Difference]: With dead ends: 281 [2018-10-03 09:08:10,894 INFO L226 Difference]: Without dead ends: 279 [2018-10-03 09:08:10,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.2s impTime 22 [2018-10-03 09:08:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-03 09:08:10,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-10-03 09:08:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-03 09:08:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-10-03 09:08:10,962 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-10-03 09:08:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:10,962 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-10-03 09:08:10,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 09:08:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-10-03 09:08:10,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-03 09:08:10,964 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:10,964 INFO L375 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-10-03 09:08:10,964 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:10,965 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:10,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 25 times [2018-10-03 09:08:10,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:10,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:10,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:10,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:10,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-10-03 09:08:11,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:11,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:11,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:08:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:11,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-10-03 09:08:13,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:13,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 09:08:13,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 09:08:13,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 09:08:13,177 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:13,177 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-10-03 09:08:13,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:13,354 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-10-03 09:08:13,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 09:08:13,354 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-10-03 09:08:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:13,356 INFO L225 Difference]: With dead ends: 293 [2018-10-03 09:08:13,356 INFO L226 Difference]: Without dead ends: 291 [2018-10-03 09:08:13,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 0.3s impTime 23 [2018-10-03 09:08:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-03 09:08:13,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-10-03 09:08:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-03 09:08:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-10-03 09:08:13,454 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-10-03 09:08:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:13,455 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-10-03 09:08:13,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 09:08:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-10-03 09:08:13,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-03 09:08:13,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:13,457 INFO L375 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-10-03 09:08:13,457 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:13,457 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:13,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 26 times [2018-10-03 09:08:13,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:13,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:13,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:13,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:08:13,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:13,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-10-03 09:08:14,220 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:14,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:14,228 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:08:14,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:08:14,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:14,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-10-03 09:08:15,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:15,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 09:08:15,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 09:08:15,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 09:08:15,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:15,720 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-10-03 09:08:15,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:15,930 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-10-03 09:08:15,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 09:08:15,930 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-10-03 09:08:15,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:15,932 INFO L225 Difference]: With dead ends: 305 [2018-10-03 09:08:15,932 INFO L226 Difference]: Without dead ends: 303 [2018-10-03 09:08:15,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.4s impTime 24 [2018-10-03 09:08:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-03 09:08:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-10-03 09:08:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-03 09:08:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-10-03 09:08:16,009 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-10-03 09:08:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:16,010 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-10-03 09:08:16,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 09:08:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-10-03 09:08:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-03 09:08:16,011 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:16,012 INFO L375 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-10-03 09:08:16,012 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:16,012 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:16,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 27 times [2018-10-03 09:08:16,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:16,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:16,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:16,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:16,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:16,632 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-03 09:08:16,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:16,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:16,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:08:17,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 145 check-sat command(s) [2018-10-03 09:08:17,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:17,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-03 09:08:18,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:18,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 09:08:18,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 09:08:18,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 09:08:18,029 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:18,029 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-10-03 09:08:18,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:18,227 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-10-03 09:08:18,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 09:08:18,227 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-10-03 09:08:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:18,229 INFO L225 Difference]: With dead ends: 317 [2018-10-03 09:08:18,229 INFO L226 Difference]: Without dead ends: 315 [2018-10-03 09:08:18,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.3s impTime 25 [2018-10-03 09:08:18,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-03 09:08:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-10-03 09:08:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-03 09:08:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-10-03 09:08:18,313 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-10-03 09:08:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:18,313 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-10-03 09:08:18,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 09:08:18,314 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-10-03 09:08:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-03 09:08:18,315 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:18,315 INFO L375 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-10-03 09:08:18,316 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:18,316 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:18,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 28 times [2018-10-03 09:08:18,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:18,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:18,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:18,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:18,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-10-03 09:08:19,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:19,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:19,435 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:08:19,609 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:08:19,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:19,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-10-03 09:08:20,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:20,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 09:08:20,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 09:08:20,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 09:08:20,625 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:20,625 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-10-03 09:08:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:20,847 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-10-03 09:08:20,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 09:08:20,847 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-10-03 09:08:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:20,849 INFO L225 Difference]: With dead ends: 329 [2018-10-03 09:08:20,849 INFO L226 Difference]: Without dead ends: 327 [2018-10-03 09:08:20,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 0.6s impTime 26 [2018-10-03 09:08:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-03 09:08:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-10-03 09:08:20,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-03 09:08:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-10-03 09:08:20,954 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-10-03 09:08:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:20,955 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-10-03 09:08:20,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 09:08:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-10-03 09:08:20,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-03 09:08:20,957 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:20,957 INFO L375 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-10-03 09:08:20,957 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:20,957 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:20,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 29 times [2018-10-03 09:08:20,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:20,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:20,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:20,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:20,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-03 09:08:21,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:21,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:21,566 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:08:21,981 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 157 check-sat command(s) [2018-10-03 09:08:21,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:21,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-03 09:08:22,529 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:22,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 09:08:22,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 09:08:22,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 09:08:22,530 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:22,531 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-10-03 09:08:22,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:22,757 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-10-03 09:08:22,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 09:08:22,757 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-10-03 09:08:22,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:22,759 INFO L225 Difference]: With dead ends: 341 [2018-10-03 09:08:22,759 INFO L226 Difference]: Without dead ends: 339 [2018-10-03 09:08:22,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.3s impTime 27 [2018-10-03 09:08:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-03 09:08:22,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-10-03 09:08:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-03 09:08:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-10-03 09:08:22,863 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-10-03 09:08:22,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:22,863 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-10-03 09:08:22,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 09:08:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-10-03 09:08:22,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-03 09:08:22,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:22,865 INFO L375 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-10-03 09:08:22,866 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:22,866 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:22,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 30 times [2018-10-03 09:08:22,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:22,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:22,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:22,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:22,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:25,034 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-10-03 09:08:25,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:25,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:25,042 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:08:25,503 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 158 check-sat command(s) [2018-10-03 09:08:25,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:25,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-10-03 09:08:26,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:26,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 09:08:26,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 09:08:26,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 09:08:26,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:26,302 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-10-03 09:08:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:26,605 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-10-03 09:08:26,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 09:08:26,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-10-03 09:08:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:26,607 INFO L225 Difference]: With dead ends: 353 [2018-10-03 09:08:26,607 INFO L226 Difference]: Without dead ends: 351 [2018-10-03 09:08:26,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 1.5s impTime 28 [2018-10-03 09:08:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-10-03 09:08:26,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-10-03 09:08:26,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-03 09:08:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-10-03 09:08:26,709 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-10-03 09:08:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:26,709 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-10-03 09:08:26,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 09:08:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-10-03 09:08:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-03 09:08:26,711 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:26,711 INFO L375 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-10-03 09:08:26,712 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:26,712 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 31 times [2018-10-03 09:08:26,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:26,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:26,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:26,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:26,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-03 09:08:27,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:27,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:27,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:08:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:27,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-03 09:08:28,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:28,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 09:08:28,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 09:08:28,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 09:08:28,156 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:28,156 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-10-03 09:08:28,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:28,440 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-10-03 09:08:28,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 09:08:28,440 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-10-03 09:08:28,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:28,442 INFO L225 Difference]: With dead ends: 365 [2018-10-03 09:08:28,442 INFO L226 Difference]: Without dead ends: 363 [2018-10-03 09:08:28,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.3s impTime 29 [2018-10-03 09:08:28,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-03 09:08:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-10-03 09:08:28,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-03 09:08:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-10-03 09:08:28,556 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-10-03 09:08:28,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:28,557 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-10-03 09:08:28,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 09:08:28,557 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-10-03 09:08:28,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-03 09:08:28,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:28,559 INFO L375 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-10-03 09:08:28,559 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:28,560 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:28,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 32 times [2018-10-03 09:08:28,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:28,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:28,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:28,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:08:28,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-10-03 09:08:29,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:29,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:29,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:08:29,360 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:08:29,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:29,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-10-03 09:08:30,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:30,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 09:08:30,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 09:08:30,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 09:08:30,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:30,082 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-10-03 09:08:30,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:30,346 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-10-03 09:08:30,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 09:08:30,346 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-10-03 09:08:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:30,348 INFO L225 Difference]: With dead ends: 377 [2018-10-03 09:08:30,348 INFO L226 Difference]: Without dead ends: 375 [2018-10-03 09:08:30,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.2s impTime 30 [2018-10-03 09:08:30,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-10-03 09:08:30,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-10-03 09:08:30,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-03 09:08:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-10-03 09:08:30,484 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-10-03 09:08:30,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:30,485 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-10-03 09:08:30,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 09:08:30,485 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-10-03 09:08:30,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-03 09:08:30,487 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:30,487 INFO L375 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-10-03 09:08:30,487 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:30,487 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:30,488 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 33 times [2018-10-03 09:08:30,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:30,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:30,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:30,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:30,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-03 09:08:31,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:31,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:31,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:08:31,704 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 181 check-sat command(s) [2018-10-03 09:08:31,704 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:31,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-03 09:08:32,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:32,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 09:08:32,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 09:08:32,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 09:08:32,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:32,558 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-10-03 09:08:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:32,824 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-10-03 09:08:32,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 09:08:32,824 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-10-03 09:08:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:32,826 INFO L225 Difference]: With dead ends: 389 [2018-10-03 09:08:32,826 INFO L226 Difference]: Without dead ends: 387 [2018-10-03 09:08:32,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.2s impTime 31 [2018-10-03 09:08:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-10-03 09:08:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-10-03 09:08:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-03 09:08:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-10-03 09:08:32,950 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-10-03 09:08:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:32,950 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-10-03 09:08:32,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 09:08:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-10-03 09:08:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-03 09:08:32,953 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:32,953 INFO L375 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-10-03 09:08:32,953 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:32,953 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:32,954 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 34 times [2018-10-03 09:08:32,954 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:32,954 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:32,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:32,955 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:32,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:33,752 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-10-03 09:08:33,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:33,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:33,759 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:08:33,955 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:08:33,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:33,960 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-10-03 09:08:34,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:34,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 09:08:34,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 09:08:34,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 09:08:34,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:34,675 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-10-03 09:08:34,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:34,998 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-10-03 09:08:34,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 09:08:34,999 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-10-03 09:08:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:35,001 INFO L225 Difference]: With dead ends: 401 [2018-10-03 09:08:35,001 INFO L226 Difference]: Without dead ends: 399 [2018-10-03 09:08:35,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.4s impTime 32 [2018-10-03 09:08:35,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-10-03 09:08:35,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-10-03 09:08:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-03 09:08:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-10-03 09:08:35,168 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-10-03 09:08:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:35,168 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-10-03 09:08:35,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 09:08:35,168 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-10-03 09:08:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-03 09:08:35,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:35,171 INFO L375 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-10-03 09:08:35,171 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:35,171 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:35,171 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 35 times [2018-10-03 09:08:35,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:35,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:35,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:35,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:35,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:36,176 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-10-03 09:08:36,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:36,177 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:36,186 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:08:36,825 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 193 check-sat command(s) [2018-10-03 09:08:36,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:36,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-10-03 09:08:37,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:37,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 09:08:37,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 09:08:37,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 09:08:37,518 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:37,518 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-10-03 09:08:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:37,839 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-10-03 09:08:37,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 09:08:37,840 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-10-03 09:08:37,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:37,841 INFO L225 Difference]: With dead ends: 413 [2018-10-03 09:08:37,841 INFO L226 Difference]: Without dead ends: 411 [2018-10-03 09:08:37,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.6s impTime 33 [2018-10-03 09:08:37,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-10-03 09:08:37,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-10-03 09:08:37,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-03 09:08:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-10-03 09:08:37,989 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-10-03 09:08:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:37,989 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-10-03 09:08:37,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 09:08:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-10-03 09:08:37,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-03 09:08:37,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:37,992 INFO L375 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-10-03 09:08:37,992 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:37,992 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:37,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 36 times [2018-10-03 09:08:37,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:37,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:37,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:37,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:37,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-10-03 09:08:38,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:38,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:38,695 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:08:39,319 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 195 check-sat command(s) [2018-10-03 09:08:39,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:39,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-10-03 09:08:40,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:40,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 09:08:40,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 09:08:40,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 09:08:40,083 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:40,083 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-10-03 09:08:40,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:40,454 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-10-03 09:08:40,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 09:08:40,454 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-10-03 09:08:40,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:40,456 INFO L225 Difference]: With dead ends: 425 [2018-10-03 09:08:40,456 INFO L226 Difference]: Without dead ends: 423 [2018-10-03 09:08:40,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.3s impTime 34 [2018-10-03 09:08:40,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-10-03 09:08:40,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-10-03 09:08:40,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-03 09:08:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-10-03 09:08:40,606 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-10-03 09:08:40,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:40,606 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-10-03 09:08:40,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 09:08:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-10-03 09:08:40,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-03 09:08:40,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:40,609 INFO L375 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-10-03 09:08:40,609 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:40,609 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:40,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 37 times [2018-10-03 09:08:40,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:40,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:40,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:40,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:40,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-10-03 09:08:41,327 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:41,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:41,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:08:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:41,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-10-03 09:08:42,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:42,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 09:08:42,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 09:08:42,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 09:08:42,348 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:42,348 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-10-03 09:08:42,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:42,806 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-10-03 09:08:42,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 09:08:42,807 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-10-03 09:08:42,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:42,808 INFO L225 Difference]: With dead ends: 437 [2018-10-03 09:08:42,808 INFO L226 Difference]: Without dead ends: 435 [2018-10-03 09:08:42,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.3s impTime 35 [2018-10-03 09:08:42,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-10-03 09:08:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-10-03 09:08:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-03 09:08:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-10-03 09:08:42,962 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-10-03 09:08:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:42,963 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-10-03 09:08:42,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 09:08:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-10-03 09:08:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-03 09:08:42,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:42,965 INFO L375 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-10-03 09:08:42,966 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:42,966 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:42,966 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 38 times [2018-10-03 09:08:42,966 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:42,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:42,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:42,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:08:42,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:43,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-10-03 09:08:43,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:43,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:43,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:08:44,169 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:08:44,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:44,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-10-03 09:08:45,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:45,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 09:08:45,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 09:08:45,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 09:08:45,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:45,332 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-10-03 09:08:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:45,735 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-10-03 09:08:45,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 09:08:45,735 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-10-03 09:08:45,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:45,737 INFO L225 Difference]: With dead ends: 449 [2018-10-03 09:08:45,737 INFO L226 Difference]: Without dead ends: 447 [2018-10-03 09:08:45,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.5s impTime 36 [2018-10-03 09:08:45,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-10-03 09:08:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-10-03 09:08:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-03 09:08:45,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-10-03 09:08:45,902 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-10-03 09:08:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:45,902 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-10-03 09:08:45,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 09:08:45,903 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-10-03 09:08:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-03 09:08:45,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:45,905 INFO L375 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-10-03 09:08:45,906 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:45,906 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:45,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 39 times [2018-10-03 09:08:45,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:45,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:45,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:45,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:45,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-03 09:08:47,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:47,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:47,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:08:47,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 217 check-sat command(s) [2018-10-03 09:08:47,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:47,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-03 09:08:48,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:48,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 09:08:48,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 09:08:48,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 09:08:48,609 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:48,609 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-10-03 09:08:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:48,947 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-10-03 09:08:48,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 09:08:48,947 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-10-03 09:08:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:48,949 INFO L225 Difference]: With dead ends: 461 [2018-10-03 09:08:48,949 INFO L226 Difference]: Without dead ends: 459 [2018-10-03 09:08:48,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.6s impTime 37 [2018-10-03 09:08:48,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-10-03 09:08:49,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-10-03 09:08:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-10-03 09:08:49,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-10-03 09:08:49,124 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-10-03 09:08:49,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:49,124 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-10-03 09:08:49,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 09:08:49,124 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-10-03 09:08:49,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-10-03 09:08:49,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:49,126 INFO L375 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-10-03 09:08:49,126 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:49,126 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:49,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 40 times [2018-10-03 09:08:49,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:49,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:49,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:49,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:49,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-10-03 09:08:50,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:50,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:50,259 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:08:50,495 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:08:50,495 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:50,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-10-03 09:08:51,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:51,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 09:08:51,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 09:08:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 09:08:51,514 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:51,514 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-10-03 09:08:51,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:51,907 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-10-03 09:08:51,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 09:08:51,908 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-10-03 09:08:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:51,909 INFO L225 Difference]: With dead ends: 473 [2018-10-03 09:08:51,910 INFO L226 Difference]: Without dead ends: 471 [2018-10-03 09:08:51,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.5s impTime 38 [2018-10-03 09:08:51,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-10-03 09:08:52,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-10-03 09:08:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-10-03 09:08:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-10-03 09:08:52,113 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-10-03 09:08:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:52,114 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-10-03 09:08:52,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 09:08:52,114 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-10-03 09:08:52,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-10-03 09:08:52,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:52,116 INFO L375 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-10-03 09:08:52,117 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:52,117 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:52,117 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 41 times [2018-10-03 09:08:52,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:52,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:52,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:52,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:52,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-10-03 09:08:52,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:52,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:52,961 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:08:53,800 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 229 check-sat command(s) [2018-10-03 09:08:53,801 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:53,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-10-03 09:08:54,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:54,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 09:08:54,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 09:08:54,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 09:08:54,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:54,611 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-10-03 09:08:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:55,208 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-10-03 09:08:55,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 09:08:55,209 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-10-03 09:08:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:55,210 INFO L225 Difference]: With dead ends: 485 [2018-10-03 09:08:55,211 INFO L226 Difference]: Without dead ends: 483 [2018-10-03 09:08:55,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.4s impTime 39 [2018-10-03 09:08:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-10-03 09:08:55,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-10-03 09:08:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-10-03 09:08:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-10-03 09:08:55,420 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-10-03 09:08:55,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:55,420 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-10-03 09:08:55,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 09:08:55,420 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-10-03 09:08:55,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-10-03 09:08:55,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:55,423 INFO L375 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-10-03 09:08:55,423 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:55,423 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:55,423 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 42 times [2018-10-03 09:08:55,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:55,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:55,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:55,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:55,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:56,462 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-03 09:08:56,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:56,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:56,471 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:08:57,298 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 230 check-sat command(s) [2018-10-03 09:08:57,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:08:57,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:08:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-03 09:08:58,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:08:58,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 09:08:58,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 09:08:58,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 09:08:58,211 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:08:58,211 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-10-03 09:08:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:08:58,626 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-10-03 09:08:58,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 09:08:58,626 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-10-03 09:08:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:08:58,628 INFO L225 Difference]: With dead ends: 497 [2018-10-03 09:08:58,628 INFO L226 Difference]: Without dead ends: 495 [2018-10-03 09:08:58,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.4s impTime 40 [2018-10-03 09:08:58,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-10-03 09:08:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-10-03 09:08:58,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-10-03 09:08:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-10-03 09:08:58,848 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-10-03 09:08:58,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:08:58,848 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-10-03 09:08:58,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 09:08:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-10-03 09:08:58,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-10-03 09:08:58,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:08:58,851 INFO L375 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-10-03 09:08:58,851 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:08:58,851 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:08:58,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 43 times [2018-10-03 09:08:58,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:08:58,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:08:58,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:58,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:08:58,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:08:58,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-10-03 09:08:59,584 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:08:59,584 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:08:59,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:08:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:08:59,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-10-03 09:09:00,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:00,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 09:09:00,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 09:09:00,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 09:09:00,701 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:00,701 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-10-03 09:09:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:01,124 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-10-03 09:09:01,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 09:09:01,124 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-10-03 09:09:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:01,126 INFO L225 Difference]: With dead ends: 509 [2018-10-03 09:09:01,126 INFO L226 Difference]: Without dead ends: 507 [2018-10-03 09:09:01,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.3s impTime 41 [2018-10-03 09:09:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-10-03 09:09:01,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-10-03 09:09:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-10-03 09:09:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-10-03 09:09:01,343 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-10-03 09:09:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:01,344 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-10-03 09:09:01,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 09:09:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-10-03 09:09:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-10-03 09:09:01,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:01,346 INFO L375 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-10-03 09:09:01,346 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:01,346 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 44 times [2018-10-03 09:09:01,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:01,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:01,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:01,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:09:01,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-10-03 09:09:02,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:02,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:02,018 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:09:02,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:09:02,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:02,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-10-03 09:09:03,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:03,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 09:09:03,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 09:09:03,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 09:09:03,146 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:03,146 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-10-03 09:09:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:03,608 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-10-03 09:09:03,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 09:09:03,608 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-10-03 09:09:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:03,610 INFO L225 Difference]: With dead ends: 521 [2018-10-03 09:09:03,610 INFO L226 Difference]: Without dead ends: 519 [2018-10-03 09:09:03,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.2s impTime 42 [2018-10-03 09:09:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-10-03 09:09:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-10-03 09:09:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-10-03 09:09:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-10-03 09:09:03,861 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-10-03 09:09:03,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:03,862 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-10-03 09:09:03,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 09:09:03,862 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-10-03 09:09:03,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-10-03 09:09:03,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:03,864 INFO L375 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-10-03 09:09:03,864 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:03,864 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:03,864 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 45 times [2018-10-03 09:09:03,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:03,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:03,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:03,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:03,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:04,731 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-10-03 09:09:04,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:04,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:04,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:09:05,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 253 check-sat command(s) [2018-10-03 09:09:05,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:05,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-10-03 09:09:06,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:06,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 09:09:06,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 09:09:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 09:09:06,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:06,989 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-10-03 09:09:07,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:07,628 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-10-03 09:09:07,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 09:09:07,633 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-10-03 09:09:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:07,635 INFO L225 Difference]: With dead ends: 533 [2018-10-03 09:09:07,635 INFO L226 Difference]: Without dead ends: 531 [2018-10-03 09:09:07,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.4s impTime 43 [2018-10-03 09:09:07,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-10-03 09:09:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-10-03 09:09:07,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-10-03 09:09:07,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-10-03 09:09:07,912 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-10-03 09:09:07,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:07,912 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-10-03 09:09:07,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 09:09:07,912 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-10-03 09:09:07,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-10-03 09:09:07,914 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:07,915 INFO L375 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-10-03 09:09:07,915 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:07,915 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:07,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 46 times [2018-10-03 09:09:07,915 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:07,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:07,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:07,916 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:07,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-10-03 09:09:08,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:08,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:08,764 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:09:09,035 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:09:09,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:09,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-10-03 09:09:09,996 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:09,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 09:09:09,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 09:09:09,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 09:09:09,997 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:09,997 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-10-03 09:09:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:10,658 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-10-03 09:09:10,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 09:09:10,663 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-10-03 09:09:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:10,665 INFO L225 Difference]: With dead ends: 545 [2018-10-03 09:09:10,665 INFO L226 Difference]: Without dead ends: 543 [2018-10-03 09:09:10,666 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.4s impTime 44 [2018-10-03 09:09:10,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-10-03 09:09:10,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-10-03 09:09:10,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-10-03 09:09:10,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-10-03 09:09:10,956 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-10-03 09:09:10,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:10,957 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-10-03 09:09:10,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 09:09:10,957 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-10-03 09:09:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-10-03 09:09:10,959 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:10,959 INFO L375 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-10-03 09:09:10,959 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:10,959 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 47 times [2018-10-03 09:09:10,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:10,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:10,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:10,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:10,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-10-03 09:09:11,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:11,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:11,927 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:09:12,993 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 265 check-sat command(s) [2018-10-03 09:09:12,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:13,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-10-03 09:09:13,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:13,972 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 09:09:13,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 09:09:13,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 09:09:13,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:13,973 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-10-03 09:09:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:14,563 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-10-03 09:09:14,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 09:09:14,564 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-10-03 09:09:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:14,565 INFO L225 Difference]: With dead ends: 557 [2018-10-03 09:09:14,566 INFO L226 Difference]: Without dead ends: 555 [2018-10-03 09:09:14,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.4s impTime 45 [2018-10-03 09:09:14,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-10-03 09:09:14,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-10-03 09:09:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-10-03 09:09:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-10-03 09:09:14,856 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-10-03 09:09:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:14,856 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-10-03 09:09:14,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 09:09:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-10-03 09:09:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-10-03 09:09:14,858 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:14,859 INFO L375 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-10-03 09:09:14,859 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:14,859 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 48 times [2018-10-03 09:09:14,859 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:14,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:14,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:14,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:14,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-10-03 09:09:15,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:15,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:15,720 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:09:16,890 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 267 check-sat command(s) [2018-10-03 09:09:16,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:16,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-10-03 09:09:17,938 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:17,939 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 09:09:17,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 09:09:17,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 09:09:17,940 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:17,940 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-10-03 09:09:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:18,473 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-10-03 09:09:18,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 09:09:18,473 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-10-03 09:09:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:18,475 INFO L225 Difference]: With dead ends: 569 [2018-10-03 09:09:18,475 INFO L226 Difference]: Without dead ends: 567 [2018-10-03 09:09:18,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.4s impTime 46 [2018-10-03 09:09:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-10-03 09:09:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-10-03 09:09:18,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-10-03 09:09:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-10-03 09:09:18,754 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-10-03 09:09:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:18,754 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-10-03 09:09:18,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 09:09:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-10-03 09:09:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-10-03 09:09:18,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:18,757 INFO L375 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-10-03 09:09:18,757 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:18,757 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:18,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 49 times [2018-10-03 09:09:18,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:18,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:18,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:18,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:18,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-10-03 09:09:19,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:19,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:19,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:09:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:19,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-10-03 09:09:20,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:20,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 09:09:20,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 09:09:20,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 09:09:20,830 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:20,830 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-10-03 09:09:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:21,374 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-10-03 09:09:21,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 09:09:21,375 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-10-03 09:09:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:21,377 INFO L225 Difference]: With dead ends: 581 [2018-10-03 09:09:21,377 INFO L226 Difference]: Without dead ends: 579 [2018-10-03 09:09:21,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.2s impTime 47 [2018-10-03 09:09:21,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-10-03 09:09:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-10-03 09:09:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-10-03 09:09:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-10-03 09:09:21,668 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-10-03 09:09:21,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:21,669 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-10-03 09:09:21,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 09:09:21,669 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-10-03 09:09:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-10-03 09:09:21,672 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:21,672 INFO L375 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-10-03 09:09:21,672 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:21,672 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:21,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 50 times [2018-10-03 09:09:21,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:21,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:21,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:21,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:09:21,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-10-03 09:09:22,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:22,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:22,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:09:22,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:09:22,702 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:22,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-10-03 09:09:23,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:23,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 09:09:23,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 09:09:23,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 09:09:23,772 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:23,772 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-10-03 09:09:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:24,307 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-10-03 09:09:24,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 09:09:24,307 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-10-03 09:09:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:24,310 INFO L225 Difference]: With dead ends: 593 [2018-10-03 09:09:24,310 INFO L226 Difference]: Without dead ends: 591 [2018-10-03 09:09:24,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.2s impTime 48 [2018-10-03 09:09:24,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-10-03 09:09:24,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-10-03 09:09:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-10-03 09:09:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-10-03 09:09:24,627 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-10-03 09:09:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:24,627 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-10-03 09:09:24,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 09:09:24,628 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-10-03 09:09:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-10-03 09:09:24,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:24,630 INFO L375 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-10-03 09:09:24,631 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:24,631 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:24,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 51 times [2018-10-03 09:09:24,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:24,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:24,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:24,632 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:24,632 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-10-03 09:09:25,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:25,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:25,893 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:09:27,214 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 289 check-sat command(s) [2018-10-03 09:09:27,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:27,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-10-03 09:09:28,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:28,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 09:09:28,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 09:09:28,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 09:09:28,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:28,350 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-10-03 09:09:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:28,959 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-10-03 09:09:28,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 09:09:28,959 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-10-03 09:09:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:28,961 INFO L225 Difference]: With dead ends: 605 [2018-10-03 09:09:28,961 INFO L226 Difference]: Without dead ends: 603 [2018-10-03 09:09:28,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.6s impTime 49 [2018-10-03 09:09:28,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-10-03 09:09:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-10-03 09:09:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-10-03 09:09:29,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-10-03 09:09:29,273 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-10-03 09:09:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:29,273 INFO L480 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-10-03 09:09:29,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 09:09:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-10-03 09:09:29,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-10-03 09:09:29,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:29,276 INFO L375 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-10-03 09:09:29,276 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:29,276 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:29,277 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 52 times [2018-10-03 09:09:29,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:29,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:29,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:29,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:29,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-10-03 09:09:30,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:30,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:30,351 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:09:30,657 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:09:30,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:30,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-10-03 09:09:31,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:31,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 09:09:31,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 09:09:31,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 09:09:31,778 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:31,778 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-10-03 09:09:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:32,430 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-10-03 09:09:32,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 09:09:32,430 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-10-03 09:09:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:32,433 INFO L225 Difference]: With dead ends: 617 [2018-10-03 09:09:32,433 INFO L226 Difference]: Without dead ends: 615 [2018-10-03 09:09:32,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.5s impTime 50 [2018-10-03 09:09:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-10-03 09:09:32,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-10-03 09:09:32,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-10-03 09:09:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-10-03 09:09:32,782 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-10-03 09:09:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:32,782 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-10-03 09:09:32,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 09:09:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-10-03 09:09:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-10-03 09:09:32,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:32,785 INFO L375 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-10-03 09:09:32,785 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:32,785 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:32,786 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 53 times [2018-10-03 09:09:32,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:32,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:32,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:32,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:32,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-10-03 09:09:33,620 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:33,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:33,630 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:09:34,953 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 301 check-sat command(s) [2018-10-03 09:09:34,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:34,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-10-03 09:09:36,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:36,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 09:09:36,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 09:09:36,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 09:09:36,374 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:36,374 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-10-03 09:09:37,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:37,004 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-10-03 09:09:37,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 09:09:37,004 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-10-03 09:09:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:37,007 INFO L225 Difference]: With dead ends: 629 [2018-10-03 09:09:37,007 INFO L226 Difference]: Without dead ends: 627 [2018-10-03 09:09:37,007 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.3s impTime 51 [2018-10-03 09:09:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-10-03 09:09:37,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-10-03 09:09:37,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-10-03 09:09:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-10-03 09:09:37,374 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-10-03 09:09:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:37,374 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-10-03 09:09:37,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 09:09:37,374 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-10-03 09:09:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-10-03 09:09:37,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:37,377 INFO L375 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-10-03 09:09:37,377 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:37,377 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:37,378 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 54 times [2018-10-03 09:09:37,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:37,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:37,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:37,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:37,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:37,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-10-03 09:09:38,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:38,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:38,362 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:09:39,768 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 302 check-sat command(s) [2018-10-03 09:09:39,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:39,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-10-03 09:09:40,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:40,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 09:09:40,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 09:09:40,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 09:09:40,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:40,968 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-10-03 09:09:41,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:41,644 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-10-03 09:09:41,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 09:09:41,644 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-10-03 09:09:41,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:41,647 INFO L225 Difference]: With dead ends: 641 [2018-10-03 09:09:41,647 INFO L226 Difference]: Without dead ends: 639 [2018-10-03 09:09:41,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.3s impTime 52 [2018-10-03 09:09:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-10-03 09:09:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-10-03 09:09:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-10-03 09:09:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-10-03 09:09:42,016 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-10-03 09:09:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:42,017 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-10-03 09:09:42,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 09:09:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-10-03 09:09:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-10-03 09:09:42,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:42,019 INFO L375 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-10-03 09:09:42,020 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:42,020 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:42,020 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 55 times [2018-10-03 09:09:42,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:42,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:42,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:42,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:42,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:42,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-10-03 09:09:43,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:43,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:43,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:09:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:43,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-10-03 09:09:44,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:44,602 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 09:09:44,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 09:09:44,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 09:09:44,603 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:44,603 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-10-03 09:09:45,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:45,291 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-10-03 09:09:45,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 09:09:45,291 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-10-03 09:09:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:45,293 INFO L225 Difference]: With dead ends: 653 [2018-10-03 09:09:45,293 INFO L226 Difference]: Without dead ends: 651 [2018-10-03 09:09:45,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.4s impTime 53 [2018-10-03 09:09:45,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-10-03 09:09:45,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-10-03 09:09:45,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-10-03 09:09:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-10-03 09:09:45,662 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-10-03 09:09:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:45,662 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-10-03 09:09:45,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 09:09:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-10-03 09:09:45,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-10-03 09:09:45,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:45,665 INFO L375 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-10-03 09:09:45,666 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:45,666 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:45,666 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 56 times [2018-10-03 09:09:45,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:45,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:45,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:45,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:09:45,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-10-03 09:09:46,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:46,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:46,656 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:09:46,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:09:46,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:47,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-10-03 09:09:48,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:48,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 09:09:48,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 09:09:48,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 09:09:48,438 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:48,439 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-10-03 09:09:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:49,179 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-10-03 09:09:49,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 09:09:49,180 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-10-03 09:09:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:49,182 INFO L225 Difference]: With dead ends: 665 [2018-10-03 09:09:49,182 INFO L226 Difference]: Without dead ends: 663 [2018-10-03 09:09:49,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.4s impTime 54 [2018-10-03 09:09:49,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-10-03 09:09:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-10-03 09:09:49,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-10-03 09:09:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-10-03 09:09:49,556 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-10-03 09:09:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:49,557 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-10-03 09:09:49,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 09:09:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-10-03 09:09:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-10-03 09:09:49,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:49,560 INFO L375 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-10-03 09:09:49,560 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:49,560 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:49,560 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 57 times [2018-10-03 09:09:49,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:49,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:49,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:49,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:49,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-03 09:09:50,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:50,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:50,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:09:52,355 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 325 check-sat command(s) [2018-10-03 09:09:52,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:52,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-03 09:09:53,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:53,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 09:09:53,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 09:09:53,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 09:09:53,805 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:53,805 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-10-03 09:09:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:54,576 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-10-03 09:09:54,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 09:09:54,576 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-10-03 09:09:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:54,578 INFO L225 Difference]: With dead ends: 677 [2018-10-03 09:09:54,578 INFO L226 Difference]: Without dead ends: 675 [2018-10-03 09:09:54,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.6s impTime 55 [2018-10-03 09:09:54,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-10-03 09:09:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-10-03 09:09:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-10-03 09:09:54,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-10-03 09:09:54,967 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-10-03 09:09:54,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:54,967 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-10-03 09:09:54,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 09:09:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-10-03 09:09:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-10-03 09:09:54,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:54,970 INFO L375 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-10-03 09:09:54,971 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:54,971 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:54,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 58 times [2018-10-03 09:09:54,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:54,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:54,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:54,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:54,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:09:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-10-03 09:09:55,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:09:55,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:09:55,942 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:09:56,285 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:09:56,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:09:56,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:09:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-10-03 09:09:57,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:09:57,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 09:09:57,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 09:09:57,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 09:09:57,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:09:57,679 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-10-03 09:09:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:09:58,460 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-10-03 09:09:58,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 09:09:58,461 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-10-03 09:09:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:09:58,463 INFO L225 Difference]: With dead ends: 689 [2018-10-03 09:09:58,463 INFO L226 Difference]: Without dead ends: 687 [2018-10-03 09:09:58,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.3s impTime 56 [2018-10-03 09:09:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-10-03 09:09:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-10-03 09:09:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-10-03 09:09:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-10-03 09:09:58,886 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-10-03 09:09:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:09:58,887 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-10-03 09:09:58,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 09:09:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-10-03 09:09:58,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-10-03 09:09:58,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:09:58,890 INFO L375 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-10-03 09:09:58,890 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:09:58,891 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:09:58,891 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 59 times [2018-10-03 09:09:58,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:09:58,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:09:58,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:58,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:09:58,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:09:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-03 09:10:00,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:10:00,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:10:00,227 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:10:01,891 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 337 check-sat command(s) [2018-10-03 09:10:01,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:10:01,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:10:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-03 09:10:03,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:10:03,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 09:10:03,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 09:10:03,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 09:10:03,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:10:03,527 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-10-03 09:10:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:10:04,390 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-10-03 09:10:04,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 09:10:04,390 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-10-03 09:10:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:10:04,392 INFO L225 Difference]: With dead ends: 701 [2018-10-03 09:10:04,392 INFO L226 Difference]: Without dead ends: 699 [2018-10-03 09:10:04,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 0.7s impTime 57 [2018-10-03 09:10:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-10-03 09:10:04,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-10-03 09:10:04,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-10-03 09:10:04,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-10-03 09:10:04,853 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-10-03 09:10:04,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:10:04,854 INFO L480 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-10-03 09:10:04,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 09:10:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-10-03 09:10:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-10-03 09:10:04,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:10:04,857 INFO L375 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-10-03 09:10:04,857 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:10:04,858 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:10:04,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 60 times [2018-10-03 09:10:04,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:10:04,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:10:04,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:04,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:10:04,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-10-03 09:10:06,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:10:06,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:10:06,090 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:10:07,835 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 339 check-sat command(s) [2018-10-03 09:10:07,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:10:07,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:10:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-10-03 09:10:09,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:10:09,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 09:10:09,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 09:10:09,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 09:10:09,185 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:10:09,185 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-10-03 09:10:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:10:10,061 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-10-03 09:10:10,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 09:10:10,061 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-10-03 09:10:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:10:10,064 INFO L225 Difference]: With dead ends: 713 [2018-10-03 09:10:10,064 INFO L226 Difference]: Without dead ends: 711 [2018-10-03 09:10:10,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.6s impTime 58 [2018-10-03 09:10:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-10-03 09:10:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-10-03 09:10:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-10-03 09:10:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-10-03 09:10:10,503 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-10-03 09:10:10,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:10:10,504 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-10-03 09:10:10,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 09:10:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-10-03 09:10:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-10-03 09:10:10,507 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:10:10,507 INFO L375 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-10-03 09:10:10,507 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:10:10,507 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:10:10,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 61 times [2018-10-03 09:10:10,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:10:10,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:10:10,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:10,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:10:10,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:11,800 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-10-03 09:10:11,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:10:11,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:10:11,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:10:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:12,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:10:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-10-03 09:10:13,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:10:13,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 09:10:13,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 09:10:13,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 09:10:13,883 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:10:13,883 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-10-03 09:10:14,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:10:14,728 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-10-03 09:10:14,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 09:10:14,729 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-10-03 09:10:14,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:10:14,731 INFO L225 Difference]: With dead ends: 725 [2018-10-03 09:10:14,731 INFO L226 Difference]: Without dead ends: 723 [2018-10-03 09:10:14,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 0.6s impTime 59 [2018-10-03 09:10:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-10-03 09:10:15,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-10-03 09:10:15,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-10-03 09:10:15,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-10-03 09:10:15,211 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-10-03 09:10:15,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:10:15,211 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-10-03 09:10:15,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 09:10:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-10-03 09:10:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-10-03 09:10:15,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:10:15,215 INFO L375 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-10-03 09:10:15,215 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:10:15,215 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:10:15,216 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 62 times [2018-10-03 09:10:15,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:10:15,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:10:15,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:15,216 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:10:15,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-10-03 09:10:16,337 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:10:16,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:10:16,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:10:16,709 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:10:16,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:10:16,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:10:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-10-03 09:10:18,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:10:18,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 09:10:18,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 09:10:18,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 09:10:18,354 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:10:18,354 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-10-03 09:10:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:10:19,239 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-10-03 09:10:19,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 09:10:19,239 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-10-03 09:10:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:10:19,242 INFO L225 Difference]: With dead ends: 737 [2018-10-03 09:10:19,242 INFO L226 Difference]: Without dead ends: 735 [2018-10-03 09:10:19,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.4s impTime 60 [2018-10-03 09:10:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-10-03 09:10:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-10-03 09:10:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-03 09:10:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-10-03 09:10:19,730 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-10-03 09:10:19,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:10:19,731 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-10-03 09:10:19,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 09:10:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-10-03 09:10:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-10-03 09:10:19,735 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:10:19,735 INFO L375 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-10-03 09:10:19,735 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:10:19,735 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:10:19,736 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 63 times [2018-10-03 09:10:19,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:10:19,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:10:19,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:19,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:10:19,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-10-03 09:10:20,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:10:20,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:10:20,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:10:22,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 361 check-sat command(s) [2018-10-03 09:10:22,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:10:22,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:10:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-10-03 09:10:24,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:10:24,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 09:10:24,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 09:10:24,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 09:10:24,464 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:10:24,464 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-10-03 09:10:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:10:25,414 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-10-03 09:10:25,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 09:10:25,415 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-10-03 09:10:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:10:25,417 INFO L225 Difference]: With dead ends: 749 [2018-10-03 09:10:25,417 INFO L226 Difference]: Without dead ends: 747 [2018-10-03 09:10:25,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.4s impTime 61 [2018-10-03 09:10:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-10-03 09:10:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-10-03 09:10:25,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-10-03 09:10:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-10-03 09:10:25,961 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-10-03 09:10:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:10:25,962 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-10-03 09:10:25,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 09:10:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-10-03 09:10:25,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-10-03 09:10:25,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:10:25,966 INFO L375 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-10-03 09:10:25,966 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:10:25,966 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:10:25,966 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 64 times [2018-10-03 09:10:25,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:10:25,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:10:25,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:25,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:10:25,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-10-03 09:10:27,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:10:27,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:10:27,343 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:10:27,734 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:10:27,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:10:27,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:10:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-10-03 09:10:29,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:10:29,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 09:10:29,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 09:10:29,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 09:10:29,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:10:29,541 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-10-03 09:10:30,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:10:30,958 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-10-03 09:10:30,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 09:10:30,958 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-10-03 09:10:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:10:30,961 INFO L225 Difference]: With dead ends: 761 [2018-10-03 09:10:30,961 INFO L226 Difference]: Without dead ends: 759 [2018-10-03 09:10:30,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 0.6s impTime 62 [2018-10-03 09:10:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-10-03 09:10:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-10-03 09:10:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-10-03 09:10:31,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-10-03 09:10:31,500 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-10-03 09:10:31,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:10:31,500 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-10-03 09:10:31,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 09:10:31,500 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-10-03 09:10:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-10-03 09:10:31,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:10:31,504 INFO L375 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-10-03 09:10:31,504 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:10:31,504 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:10:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 65 times [2018-10-03 09:10:31,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:10:31,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:10:31,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:31,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:10:31,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-10-03 09:10:32,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:10:32,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:10:32,765 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:10:34,847 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 373 check-sat command(s) [2018-10-03 09:10:34,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:10:34,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:10:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-10-03 09:10:36,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:10:36,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 09:10:36,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 09:10:36,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 09:10:36,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:10:36,323 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-10-03 09:10:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:10:37,314 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-10-03 09:10:37,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 09:10:37,315 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-10-03 09:10:37,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:10:37,317 INFO L225 Difference]: With dead ends: 773 [2018-10-03 09:10:37,317 INFO L226 Difference]: Without dead ends: 771 [2018-10-03 09:10:37,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 747 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.4s impTime 63 [2018-10-03 09:10:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-10-03 09:10:37,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-10-03 09:10:37,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-10-03 09:10:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-10-03 09:10:37,905 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-10-03 09:10:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:10:37,905 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-10-03 09:10:37,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 09:10:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-10-03 09:10:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-10-03 09:10:37,909 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:10:37,909 INFO L375 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-10-03 09:10:37,909 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:10:37,909 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:10:37,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 66 times [2018-10-03 09:10:37,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:10:37,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:10:37,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:37,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:10:37,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-10-03 09:10:39,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:10:39,395 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:10:39,403 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:10:41,544 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 374 check-sat command(s) [2018-10-03 09:10:41,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:10:41,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:10:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-10-03 09:10:43,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:10:43,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 09:10:43,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 09:10:43,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 09:10:43,126 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:10:43,126 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-10-03 09:10:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:10:44,163 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-10-03 09:10:44,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 09:10:44,164 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-10-03 09:10:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:10:44,166 INFO L225 Difference]: With dead ends: 785 [2018-10-03 09:10:44,166 INFO L226 Difference]: Without dead ends: 783 [2018-10-03 09:10:44,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 0.6s impTime 64 [2018-10-03 09:10:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-10-03 09:10:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-10-03 09:10:44,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-10-03 09:10:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-10-03 09:10:44,723 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-10-03 09:10:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:10:44,723 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-10-03 09:10:44,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 09:10:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-10-03 09:10:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-10-03 09:10:44,727 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:10:44,727 INFO L375 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-10-03 09:10:44,727 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:10:44,727 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:10:44,728 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 67 times [2018-10-03 09:10:44,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:10:44,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:10:44,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:44,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:10:44,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-10-03 09:10:46,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:10:46,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:10:46,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:10:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:46,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:10:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-10-03 09:10:48,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:10:48,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 09:10:48,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 09:10:48,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 09:10:48,025 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:10:48,025 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-10-03 09:10:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:10:49,051 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-10-03 09:10:49,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 09:10:49,052 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-10-03 09:10:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:10:49,054 INFO L225 Difference]: With dead ends: 797 [2018-10-03 09:10:49,054 INFO L226 Difference]: Without dead ends: 795 [2018-10-03 09:10:49,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 0.5s impTime 65 [2018-10-03 09:10:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-10-03 09:10:49,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-10-03 09:10:49,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-10-03 09:10:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-10-03 09:10:49,686 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-10-03 09:10:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:10:49,687 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-10-03 09:10:49,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 09:10:49,687 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-10-03 09:10:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-10-03 09:10:49,691 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:10:49,691 INFO L375 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-10-03 09:10:49,692 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:10:49,692 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:10:49,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 68 times [2018-10-03 09:10:49,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:10:49,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:10:49,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:49,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:10:49,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-10-03 09:10:50,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:10:50,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:10:50,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:10:51,183 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:10:51,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:10:51,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:10:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-10-03 09:10:52,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:10:52,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 09:10:52,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 09:10:52,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 09:10:52,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:10:52,834 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-10-03 09:10:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:10:53,835 INFO L93 Difference]: Finished difference Result 809 states and 876 transitions. [2018-10-03 09:10:53,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 09:10:53,835 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 783 [2018-10-03 09:10:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:10:53,838 INFO L225 Difference]: With dead ends: 809 [2018-10-03 09:10:53,838 INFO L226 Difference]: Without dead ends: 807 [2018-10-03 09:10:53,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 0.2s impTime 66 [2018-10-03 09:10:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2018-10-03 09:10:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 796. [2018-10-03 09:10:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-10-03 09:10:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 862 transitions. [2018-10-03 09:10:54,478 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 862 transitions. Word has length 783 [2018-10-03 09:10:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:10:54,478 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 862 transitions. [2018-10-03 09:10:54,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 09:10:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 862 transitions. [2018-10-03 09:10:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-10-03 09:10:54,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:10:54,482 INFO L375 BasicCegarLoop]: trace histogram [660, 66, 66, 1, 1, 1] [2018-10-03 09:10:54,483 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:10:54,483 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:10:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1533429993, now seen corresponding path program 69 times [2018-10-03 09:10:54,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:10:54,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:10:54,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:54,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:10:54,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:10:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:10:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-10-03 09:10:56,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:10:56,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:10:56,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:10:58,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 397 check-sat command(s) [2018-10-03 09:10:58,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:10:58,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:11:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-10-03 09:11:00,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:11:00,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 09:11:00,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 09:11:00,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 09:11:00,505 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:11:00,505 INFO L87 Difference]: Start difference. First operand 796 states and 862 transitions. Second operand 69 states. [2018-10-03 09:11:01,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:11:01,622 INFO L93 Difference]: Finished difference Result 821 states and 889 transitions. [2018-10-03 09:11:01,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 09:11:01,623 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 795 [2018-10-03 09:11:01,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:11:01,625 INFO L225 Difference]: With dead ends: 821 [2018-10-03 09:11:01,625 INFO L226 Difference]: Without dead ends: 819 [2018-10-03 09:11:01,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 0.4s impTime 67 [2018-10-03 09:11:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-10-03 09:11:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 808. [2018-10-03 09:11:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-10-03 09:11:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 875 transitions. [2018-10-03 09:11:02,276 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 875 transitions. Word has length 795 [2018-10-03 09:11:02,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:11:02,276 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 875 transitions. [2018-10-03 09:11:02,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 09:11:02,276 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 875 transitions. [2018-10-03 09:11:02,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-10-03 09:11:02,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:11:02,280 INFO L375 BasicCegarLoop]: trace histogram [670, 67, 67, 1, 1, 1] [2018-10-03 09:11:02,281 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:11:02,281 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:11:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1888751713, now seen corresponding path program 70 times [2018-10-03 09:11:02,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:11:02,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:11:02,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:02,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:11:02,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:11:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-10-03 09:11:03,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:11:03,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:11:03,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:11:03,926 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:11:03,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:11:03,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:11:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-10-03 09:11:05,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:11:05,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 09:11:05,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 09:11:05,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 09:11:05,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:11:05,882 INFO L87 Difference]: Start difference. First operand 808 states and 875 transitions. Second operand 70 states. [2018-10-03 09:11:07,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:11:07,067 INFO L93 Difference]: Finished difference Result 833 states and 902 transitions. [2018-10-03 09:11:07,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 09:11:07,067 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 807 [2018-10-03 09:11:07,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:11:07,070 INFO L225 Difference]: With dead ends: 833 [2018-10-03 09:11:07,070 INFO L226 Difference]: Without dead ends: 831 [2018-10-03 09:11:07,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.3s impTime 68 [2018-10-03 09:11:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-10-03 09:11:07,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2018-10-03 09:11:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-10-03 09:11:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 888 transitions. [2018-10-03 09:11:07,761 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 888 transitions. Word has length 807 [2018-10-03 09:11:07,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:11:07,761 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 888 transitions. [2018-10-03 09:11:07,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 09:11:07,762 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 888 transitions. [2018-10-03 09:11:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-10-03 09:11:07,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:11:07,766 INFO L375 BasicCegarLoop]: trace histogram [680, 68, 68, 1, 1, 1] [2018-10-03 09:11:07,766 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:11:07,766 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:11:07,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353109, now seen corresponding path program 71 times [2018-10-03 09:11:07,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:11:07,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:11:07,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:07,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:11:07,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:11:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-10-03 09:11:08,994 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:11:08,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:11:09,001 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 09:11:11,819 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 409 check-sat command(s) [2018-10-03 09:11:11,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:11:11,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:11:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-10-03 09:11:13,901 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:11:13,902 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 09:11:13,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 09:11:13,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 09:11:13,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:11:13,903 INFO L87 Difference]: Start difference. First operand 820 states and 888 transitions. Second operand 71 states. [2018-10-03 09:11:15,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:11:15,094 INFO L93 Difference]: Finished difference Result 845 states and 915 transitions. [2018-10-03 09:11:15,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 09:11:15,095 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 819 [2018-10-03 09:11:15,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:11:15,098 INFO L225 Difference]: With dead ends: 845 [2018-10-03 09:11:15,098 INFO L226 Difference]: Without dead ends: 843 [2018-10-03 09:11:15,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 819 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 0.3s impTime 69 [2018-10-03 09:11:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2018-10-03 09:11:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 832. [2018-10-03 09:11:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2018-10-03 09:11:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 901 transitions. [2018-10-03 09:11:15,788 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 901 transitions. Word has length 819 [2018-10-03 09:11:15,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:11:15,788 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 901 transitions. [2018-10-03 09:11:15,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 09:11:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 901 transitions. [2018-10-03 09:11:15,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-10-03 09:11:15,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:11:15,793 INFO L375 BasicCegarLoop]: trace histogram [690, 69, 69, 1, 1, 1] [2018-10-03 09:11:15,793 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:11:15,793 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:11:15,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1822005771, now seen corresponding path program 72 times [2018-10-03 09:11:15,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:11:15,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:11:15,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:15,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:11:15,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:11:17,209 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-10-03 09:11:17,209 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:11:17,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:11:17,216 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 09:11:20,006 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 411 check-sat command(s) [2018-10-03 09:11:20,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:11:20,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:11:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-10-03 09:11:21,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:11:21,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 09:11:21,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 09:11:21,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 09:11:21,905 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:11:21,905 INFO L87 Difference]: Start difference. First operand 832 states and 901 transitions. Second operand 72 states. [2018-10-03 09:11:23,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:11:23,121 INFO L93 Difference]: Finished difference Result 857 states and 928 transitions. [2018-10-03 09:11:23,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 09:11:23,121 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 831 [2018-10-03 09:11:23,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:11:23,124 INFO L225 Difference]: With dead ends: 857 [2018-10-03 09:11:23,124 INFO L226 Difference]: Without dead ends: 855 [2018-10-03 09:11:23,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.5s impTime 70 [2018-10-03 09:11:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2018-10-03 09:11:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 844. [2018-10-03 09:11:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-10-03 09:11:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 914 transitions. [2018-10-03 09:11:23,865 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 914 transitions. Word has length 831 [2018-10-03 09:11:23,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:11:23,865 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 914 transitions. [2018-10-03 09:11:23,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 09:11:23,865 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 914 transitions. [2018-10-03 09:11:23,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-10-03 09:11:23,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:11:23,870 INFO L375 BasicCegarLoop]: trace histogram [700, 70, 70, 1, 1, 1] [2018-10-03 09:11:23,870 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:11:23,870 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:11:23,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1902862911, now seen corresponding path program 73 times [2018-10-03 09:11:23,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:11:23,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:11:23,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:23,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:11:23,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:11:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-10-03 09:11:25,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:11:25,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:11:25,750 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:11:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:11:26,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:11:28,010 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-10-03 09:11:28,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:11:28,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 09:11:28,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 09:11:28,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 09:11:28,034 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:11:28,034 INFO L87 Difference]: Start difference. First operand 844 states and 914 transitions. Second operand 73 states. [2018-10-03 09:11:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:11:29,283 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2018-10-03 09:11:29,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 09:11:29,283 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 843 [2018-10-03 09:11:29,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:11:29,285 INFO L225 Difference]: With dead ends: 869 [2018-10-03 09:11:29,285 INFO L226 Difference]: Without dead ends: 867 [2018-10-03 09:11:29,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 0.8s impTime 71 [2018-10-03 09:11:29,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-10-03 09:11:30,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 856. [2018-10-03 09:11:30,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2018-10-03 09:11:30,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 927 transitions. [2018-10-03 09:11:30,066 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 927 transitions. Word has length 843 [2018-10-03 09:11:30,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:11:30,067 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 927 transitions. [2018-10-03 09:11:30,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 09:11:30,067 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 927 transitions. [2018-10-03 09:11:30,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2018-10-03 09:11:30,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:11:30,072 INFO L375 BasicCegarLoop]: trace histogram [710, 71, 71, 1, 1, 1] [2018-10-03 09:11:30,072 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:11:30,072 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:11:30,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1438007177, now seen corresponding path program 74 times [2018-10-03 09:11:30,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:11:30,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:11:30,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:30,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 09:11:30,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:11:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-10-03 09:11:31,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:11:31,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:11:31,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 09:11:32,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 09:11:32,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:11:32,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:11:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-10-03 09:11:34,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:11:34,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 09:11:34,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 09:11:34,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 09:11:34,042 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:11:34,043 INFO L87 Difference]: Start difference. First operand 856 states and 927 transitions. Second operand 74 states. [2018-10-03 09:11:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:11:35,284 INFO L93 Difference]: Finished difference Result 881 states and 954 transitions. [2018-10-03 09:11:35,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 09:11:35,284 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 855 [2018-10-03 09:11:35,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:11:35,286 INFO L225 Difference]: With dead ends: 881 [2018-10-03 09:11:35,286 INFO L226 Difference]: Without dead ends: 879 [2018-10-03 09:11:35,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 0.5s impTime 72 [2018-10-03 09:11:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-10-03 09:11:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 868. [2018-10-03 09:11:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2018-10-03 09:11:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 940 transitions. [2018-10-03 09:11:36,060 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 940 transitions. Word has length 855 [2018-10-03 09:11:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:11:36,060 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 940 transitions. [2018-10-03 09:11:36,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 09:11:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 940 transitions. [2018-10-03 09:11:36,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-10-03 09:11:36,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:11:36,065 INFO L375 BasicCegarLoop]: trace histogram [720, 72, 72, 1, 1, 1] [2018-10-03 09:11:36,065 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:11:36,065 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:11:36,066 INFO L82 PathProgramCache]: Analyzing trace with hash 696090067, now seen corresponding path program 75 times [2018-10-03 09:11:36,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:11:36,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:11:36,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:36,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:11:36,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 09:11:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-10-03 09:11:37,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:11:37,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:11:37,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 09:11:40,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 433 check-sat command(s) [2018-10-03 09:11:40,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:11:40,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:11:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-10-03 09:11:42,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 09:11:42,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 09:11:42,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 09:11:42,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 09:11:42,455 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-03 09:11:42,455 INFO L87 Difference]: Start difference. First operand 868 states and 940 transitions. Second operand 75 states. [2018-10-03 09:11:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 09:11:43,712 INFO L93 Difference]: Finished difference Result 893 states and 967 transitions. [2018-10-03 09:11:43,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 09:11:43,712 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 867 [2018-10-03 09:11:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 09:11:43,714 INFO L225 Difference]: With dead ends: 893 [2018-10-03 09:11:43,714 INFO L226 Difference]: Without dead ends: 891 [2018-10-03 09:11:43,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.4s impTime 73 [2018-10-03 09:11:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-10-03 09:11:44,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2018-10-03 09:11:44,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-10-03 09:11:44,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 953 transitions. [2018-10-03 09:11:44,470 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 953 transitions. Word has length 867 [2018-10-03 09:11:44,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 09:11:44,470 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 953 transitions. [2018-10-03 09:11:44,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 09:11:44,470 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 953 transitions. [2018-10-03 09:11:44,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2018-10-03 09:11:44,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 09:11:44,476 INFO L375 BasicCegarLoop]: trace histogram [730, 73, 73, 1, 1, 1] [2018-10-03 09:11:44,476 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 09:11:44,476 INFO L106 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-03 09:11:44,476 INFO L82 PathProgramCache]: Analyzing trace with hash 943168797, now seen corresponding path program 76 times [2018-10-03 09:11:44,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 09:11:44,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 09:11:44,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:44,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 09:11:44,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 09:11:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 09:11:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-10-03 09:11:46,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 09:11:46,778 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:11:46,785 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 09:11:47,267 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 09:11:47,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 09:11:47,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 09:11:47,317 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-03 09:11:47,518 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 09:11:47,519 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 09:11:47,524 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 09:11:47,524 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 09:11:47 BoogieIcfgContainer [2018-10-03 09:11:47,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 09:11:47,525 INFO L168 Benchmark]: Toolchain (without parser) took 248130.20 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -201.6 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-03 09:11:47,527 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. [2018-10-03 09:11:47,528 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.36 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:11:47,528 INFO L168 Benchmark]: Boogie Preprocessor took 21.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 09:11:47,529 INFO L168 Benchmark]: RCFGBuilder took 272.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 09:11:47,530 INFO L168 Benchmark]: TraceAbstraction took 247788.93 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -222.8 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. [2018-10-03 09:11:47,533 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 41.36 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 21.83 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 272.34 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 247788.93 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -222.8 MB). Peak memory consumption was 1.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 35]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 35). Cancelled while BasicCegarLoop was analyzing trace of length 880 with TraceHistMax 730, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 247.7s OverallTime, 78 OverallIterations, 730 TraceHistogramMax, 44.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 306 SDtfs, 5396 SDslu, 3843 SDs, 0 SdLazy, 6772 SolverSat, 472 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34673 GetRequests, 31708 SyntacticMatches, 0 SemanticMatches, 2965 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=880occurred in iteration=77, 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: 18.8s AutomataMinimizationTime, 77 MinimizatonAttempts, 774 StatesRemovedByMinimization, 73 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 3.8s SsaConstructionTime, 45.5s SatisfiabilityAnalysisTime, 113.8s InterpolantComputationTime, 63494 NumberOfCodeBlocks, 63333 NumberOfCodeBlocksAsserted, 8016 NumberOfCheckSat, 63342 ConstructedInterpolants, 0 QuantifiedInterpolants, 110338344 SizeOfPredicates, 75 NumberOfNonLiveVariables, 126922 ConjunctsInSsa, 2802 ConjunctsInUnsatCore, 152 InterpolantComputations, 2 PerfectInterpolantSequences, 291563/15467137 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/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_09-11-47-544.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_09-11-47-544.csv Completed graceful shutdown