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/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b2fde6a [2018-09-28 10:28:48,067 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-28 10:28:48,069 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-28 10:28:48,082 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-28 10:28:48,082 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-28 10:28:48,083 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-28 10:28:48,085 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-28 10:28:48,086 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-28 10:28:48,088 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-28 10:28:48,089 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-28 10:28:48,090 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-28 10:28:48,090 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-28 10:28:48,091 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-28 10:28:48,092 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-28 10:28:48,093 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-28 10:28:48,094 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-28 10:28:48,095 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-28 10:28:48,096 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-28 10:28:48,098 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-28 10:28:48,100 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-28 10:28:48,101 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-28 10:28:48,102 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-28 10:28:48,104 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-28 10:28:48,113 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 [2018-09-28 10:28:48,139 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-28 10:28:48,140 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-28 10:28:48,140 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-28 10:28:48,141 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-28 10:28:48,141 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-28 10:28:48,141 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-28 10:28:48,141 INFO L133 SettingsManager]: * Use SBE=true [2018-09-28 10:28:48,142 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-28 10:28:48,142 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-28 10:28:48,142 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-28 10:28:48,142 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-28 10:28:48,143 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-28 10:28:48,143 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-28 10:28:48,143 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-28 10:28:48,143 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-28 10:28:48,143 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-28 10:28:48,143 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-28 10:28:48,144 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-28 10:28:48,144 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-28 10:28:48,144 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-28 10:28:48,144 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-28 10:28:48,144 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-28 10:28:48,145 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:28:48,145 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-28 10:28:48,145 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-28 10:28:48,145 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-28 10:28:48,145 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-28 10:28:48,146 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-28 10:28:48,146 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-28 10:28:48,146 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-28 10:28:48,146 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-28 10:28:48,188 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-28 10:28:48,203 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-28 10:28:48,211 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-28 10:28:48,212 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-28 10:28:48,213 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-28 10:28:48,214 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-28 10:28:48,214 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl' [2018-09-28 10:28:48,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-28 10:28:48,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-28 10:28:48,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-28 10:28:48,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-28 10:28:48,277 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-28 10:28:48,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:28:48" (1/1) ... [2018-09-28 10:28:48,310 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:28:48" (1/1) ... [2018-09-28 10:28:48,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-28 10:28:48,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-28 10:28:48,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-28 10:28:48,319 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-28 10:28:48,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:28:48" (1/1) ... [2018-09-28 10:28:48,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:28:48" (1/1) ... [2018-09-28 10:28:48,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:28:48" (1/1) ... [2018-09-28 10:28:48,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:28:48" (1/1) ... [2018-09-28 10:28:48,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:28:48" (1/1) ... [2018-09-28 10:28:48,335 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:28:48" (1/1) ... [2018-09-28 10:28:48,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:28:48" (1/1) ... [2018-09-28 10:28:48,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-28 10:28:48,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-28 10:28:48,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-28 10:28:48,338 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-28 10:28:48,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:28:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-28 10:28:48,395 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-28 10:28:48,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-28 10:28:48,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-28 10:28:48,620 INFO L353 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-28 10:28:48,621 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:28:48 BoogieIcfgContainer [2018-09-28 10:28:48,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-28 10:28:48,622 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-28 10:28:48,622 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-28 10:28:48,626 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-28 10:28:48,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.09 10:28:48" (1/2) ... [2018-09-28 10:28:48,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a52e8 and model type overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.09 10:28:48, skipping insertion in model container [2018-09-28 10:28:48,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.09 10:28:48" (2/2) ... [2018-09-28 10:28:48,630 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-28 10:28:48,640 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-28 10:28:48,653 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-28 10:28:48,712 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-28 10:28:48,713 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-28 10:28:48,714 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-28 10:28:48,714 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-28 10:28:48,714 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-28 10:28:48,714 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-28 10:28:48,714 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-28 10:28:48,714 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-28 10:28:48,715 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-28 10:28:48,733 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-28 10:28:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-28 10:28:48,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:48,752 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-28 10:28:48,753 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:48,765 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:48,766 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-28 10:28:48,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:48,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:48,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:48,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:48,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:49,016 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-28 10:28:49,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-28 10:28:49,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-28 10:28:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-28 10:28:49,037 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:49,039 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-28 10:28:49,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:49,174 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-28 10:28:49,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-28 10:28:49,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-28 10:28:49,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:49,195 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:28:49,195 INFO L226 Difference]: Without dead ends: 5 [2018-09-28 10:28:49,202 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:49,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-28 10:28:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-28 10:28:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-28 10:28:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-28 10:28:49,280 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-28 10:28:49,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:49,281 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-28 10:28:49,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-28 10:28:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-28 10:28:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-28 10:28:49,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:49,282 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-28 10:28:49,282 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:49,282 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:49,283 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-28 10:28:49,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:49,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:49,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:49,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:49,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:49,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:49,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:49,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:49,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:49,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:49,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-28 10:28:49,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-28 10:28:49,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-28 10:28:49,510 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:49,510 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-28 10:28:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:49,771 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-28 10:28:49,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-28 10:28:49,772 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-28 10:28:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:49,773 INFO L225 Difference]: With dead ends: 8 [2018-09-28 10:28:49,773 INFO L226 Difference]: Without dead ends: 6 [2018-09-28 10:28:49,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-28 10:28:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-28 10:28:49,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-28 10:28:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-28 10:28:49,776 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-28 10:28:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:49,776 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-28 10:28:49,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-28 10:28:49,777 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-28 10:28:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-28 10:28:49,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:49,777 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-28 10:28:49,778 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:49,778 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:49,778 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-28 10:28:49,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:49,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:49,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:49,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:49,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:49,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:49,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:49,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:28:49,905 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:28:49,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:49,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:49,967 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:49,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-28 10:28:49,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-28 10:28:49,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-28 10:28:49,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:49,969 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-28 10:28:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:50,128 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-28 10:28:50,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-28 10:28:50,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-28 10:28:50,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:50,129 INFO L225 Difference]: With dead ends: 9 [2018-09-28 10:28:50,129 INFO L226 Difference]: Without dead ends: 7 [2018-09-28 10:28:50,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:50,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-28 10:28:50,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-28 10:28:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-28 10:28:50,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-28 10:28:50,132 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-28 10:28:50,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:50,133 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-28 10:28:50,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-28 10:28:50,133 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-28 10:28:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-28 10:28:50,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:50,134 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-28 10:28:50,134 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:50,134 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:50,135 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-28 10:28:50,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:50,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:50,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:50,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:50,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:50,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:50,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:50,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:28:50,309 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-28 10:28:50,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:50,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:50,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:50,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:50,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-28 10:28:50,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-28 10:28:50,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-28 10:28:50,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:50,433 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-28 10:28:50,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:50,574 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-28 10:28:50,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-28 10:28:50,576 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-28 10:28:50,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:50,577 INFO L225 Difference]: With dead ends: 10 [2018-09-28 10:28:50,578 INFO L226 Difference]: Without dead ends: 8 [2018-09-28 10:28:50,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:50,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-28 10:28:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-28 10:28:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-28 10:28:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-28 10:28:50,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-28 10:28:50,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:50,582 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-28 10:28:50,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-28 10:28:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-28 10:28:50,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-28 10:28:50,583 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:50,583 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-28 10:28:50,584 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:50,584 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:50,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-28 10:28:50,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:50,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:50,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:50,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:50,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:50,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:50,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:50,659 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:28:50,684 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:28:50,685 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:50,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:50,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:50,809 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-28 10:28:50,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-28 10:28:50,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-28 10:28:50,810 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:50,810 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-28 10:28:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:50,876 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-28 10:28:50,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-28 10:28:50,877 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-28 10:28:50,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:50,877 INFO L225 Difference]: With dead ends: 11 [2018-09-28 10:28:50,877 INFO L226 Difference]: Without dead ends: 9 [2018-09-28 10:28:50,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-28 10:28:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-28 10:28:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-28 10:28:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-28 10:28:50,881 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-28 10:28:50,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:50,881 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-28 10:28:50,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-28 10:28:50,882 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-28 10:28:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-28 10:28:50,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:50,882 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-28 10:28:50,882 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:50,883 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:50,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-28 10:28:50,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:50,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:50,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:50,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:50,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:51,014 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:51,015 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:51,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:51,027 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:28:51,037 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-28 10:28:51,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:51,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:51,065 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:51,085 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:51,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-28 10:28:51,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-28 10:28:51,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-28 10:28:51,086 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:51,087 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-28 10:28:51,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:51,233 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-28 10:28:51,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-28 10:28:51,234 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-28 10:28:51,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:51,235 INFO L225 Difference]: With dead ends: 12 [2018-09-28 10:28:51,235 INFO L226 Difference]: Without dead ends: 10 [2018-09-28 10:28:51,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-28 10:28:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-28 10:28:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-28 10:28:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-28 10:28:51,239 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-28 10:28:51,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:51,239 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-28 10:28:51,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-28 10:28:51,239 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-28 10:28:51,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-28 10:28:51,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:51,240 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-28 10:28:51,240 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:51,241 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:51,241 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-28 10:28:51,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:51,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:51,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:51,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:51,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:51,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:51,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:51,760 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:28:51,772 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-28 10:28:51,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:51,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:51,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:51,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-28 10:28:51,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-28 10:28:51,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-28 10:28:51,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:51,836 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-28 10:28:51,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:51,932 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-28 10:28:51,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-28 10:28:51,933 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-28 10:28:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:51,934 INFO L225 Difference]: With dead ends: 13 [2018-09-28 10:28:51,934 INFO L226 Difference]: Without dead ends: 11 [2018-09-28 10:28:51,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-28 10:28:51,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-28 10:28:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-28 10:28:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-28 10:28:51,937 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-28 10:28:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:51,938 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-28 10:28:51,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-28 10:28:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-28 10:28:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-28 10:28:51,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:51,939 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-28 10:28:51,939 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:51,939 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:51,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-28 10:28:51,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:51,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:51,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:51,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:51,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:52,059 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:52,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:52,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:52,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:52,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:52,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-28 10:28:52,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-28 10:28:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-28 10:28:52,182 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:52,182 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-28 10:28:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:52,319 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-28 10:28:52,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-28 10:28:52,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-28 10:28:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:52,321 INFO L225 Difference]: With dead ends: 14 [2018-09-28 10:28:52,321 INFO L226 Difference]: Without dead ends: 12 [2018-09-28 10:28:52,322 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:52,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-28 10:28:52,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-28 10:28:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-28 10:28:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-28 10:28:52,325 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-28 10:28:52,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:52,325 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-28 10:28:52,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-28 10:28:52,325 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-28 10:28:52,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-28 10:28:52,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:52,326 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-28 10:28:52,326 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:52,327 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:52,327 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-28 10:28:52,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:52,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:52,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:52,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:52,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:52,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:52,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:52,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:28:52,505 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:28:52,505 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:52,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:52,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:52,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-28 10:28:52,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-28 10:28:52,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-28 10:28:52,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:52,573 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-28 10:28:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:52,721 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-28 10:28:52,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-28 10:28:52,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-28 10:28:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:52,725 INFO L225 Difference]: With dead ends: 15 [2018-09-28 10:28:52,725 INFO L226 Difference]: Without dead ends: 13 [2018-09-28 10:28:52,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-28 10:28:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-28 10:28:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-28 10:28:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-28 10:28:52,728 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-28 10:28:52,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:52,729 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-28 10:28:52,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-28 10:28:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-28 10:28:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-28 10:28:52,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:52,730 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-28 10:28:52,730 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:52,730 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:52,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-28 10:28:52,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:52,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:52,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:52,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:52,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:52,840 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:52,840 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:52,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:28:52,863 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-28 10:28:52,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:52,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:52,938 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:52,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:52,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-28 10:28:52,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-28 10:28:52,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-28 10:28:52,961 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:52,961 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-28 10:28:53,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:53,081 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-28 10:28:53,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-28 10:28:53,081 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-28 10:28:53,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:53,082 INFO L225 Difference]: With dead ends: 16 [2018-09-28 10:28:53,083 INFO L226 Difference]: Without dead ends: 14 [2018-09-28 10:28:53,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:53,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-28 10:28:53,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-28 10:28:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-28 10:28:53,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-28 10:28:53,087 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-28 10:28:53,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:53,088 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-28 10:28:53,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-28 10:28:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-28 10:28:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-28 10:28:53,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:53,088 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-28 10:28:53,089 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:53,089 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:53,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-28 10:28:53,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:53,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:53,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:53,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:53,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:53,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:53,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:53,257 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:28:53,278 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:28:53,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:53,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:53,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:53,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-28 10:28:53,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-28 10:28:53,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-28 10:28:53,346 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:53,346 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-28 10:28:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:53,440 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-28 10:28:53,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-28 10:28:53,440 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-28 10:28:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:53,441 INFO L225 Difference]: With dead ends: 17 [2018-09-28 10:28:53,442 INFO L226 Difference]: Without dead ends: 15 [2018-09-28 10:28:53,442 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-28 10:28:53,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-28 10:28:53,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-28 10:28:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-28 10:28:53,446 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-28 10:28:53,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:53,446 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-28 10:28:53,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-28 10:28:53,447 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-28 10:28:53,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-28 10:28:53,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:53,447 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-28 10:28:53,448 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:53,448 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:53,448 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-28 10:28:53,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:53,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:53,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:53,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:53,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:53,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:53,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:53,655 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:28:53,680 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-28 10:28:53,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:53,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:53,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:53,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-28 10:28:53,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-28 10:28:53,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-28 10:28:53,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:53,761 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-28 10:28:53,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:53,878 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-28 10:28:53,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-28 10:28:53,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-28 10:28:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:53,880 INFO L225 Difference]: With dead ends: 18 [2018-09-28 10:28:53,880 INFO L226 Difference]: Without dead ends: 16 [2018-09-28 10:28:53,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-28 10:28:53,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-28 10:28:53,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-28 10:28:53,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-28 10:28:53,885 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-28 10:28:53,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:53,886 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-28 10:28:53,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-28 10:28:53,886 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-28 10:28:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-28 10:28:53,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:53,887 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-28 10:28:53,887 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:53,887 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:53,887 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-28 10:28:53,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:53,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:53,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:53,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:53,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:53,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:53,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:54,007 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:28:54,022 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-28 10:28:54,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:54,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:54,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:54,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-28 10:28:54,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-28 10:28:54,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-28 10:28:54,100 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:54,100 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-28 10:28:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:54,229 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-28 10:28:54,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-28 10:28:54,230 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-28 10:28:54,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:54,231 INFO L225 Difference]: With dead ends: 19 [2018-09-28 10:28:54,231 INFO L226 Difference]: Without dead ends: 17 [2018-09-28 10:28:54,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-28 10:28:54,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-28 10:28:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-28 10:28:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-28 10:28:54,236 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-28 10:28:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:54,236 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-28 10:28:54,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-28 10:28:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-28 10:28:54,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-28 10:28:54,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:54,237 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-28 10:28:54,237 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:54,237 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-28 10:28:54,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:54,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:54,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:54,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:54,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:54,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:54,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:54,402 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:54,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:54,544 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:54,544 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-28 10:28:54,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-28 10:28:54,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-28 10:28:54,545 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:54,545 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-28 10:28:54,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:54,855 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-28 10:28:54,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-28 10:28:54,856 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-28 10:28:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:54,857 INFO L225 Difference]: With dead ends: 20 [2018-09-28 10:28:54,857 INFO L226 Difference]: Without dead ends: 18 [2018-09-28 10:28:54,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-28 10:28:54,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-28 10:28:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-28 10:28:54,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-28 10:28:54,862 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-28 10:28:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:54,862 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-28 10:28:54,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-28 10:28:54,862 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-28 10:28:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-28 10:28:54,863 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:54,863 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-28 10:28:54,863 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:54,863 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-28 10:28:54,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:54,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:54,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:54,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:54,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:55,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:55,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:55,213 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:28:55,229 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:28:55,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:55,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:55,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:55,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-28 10:28:55,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-28 10:28:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-28 10:28:55,328 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:55,328 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-28 10:28:55,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:55,489 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-28 10:28:55,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-28 10:28:55,490 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-28 10:28:55,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:55,491 INFO L225 Difference]: With dead ends: 21 [2018-09-28 10:28:55,491 INFO L226 Difference]: Without dead ends: 19 [2018-09-28 10:28:55,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:55,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-28 10:28:55,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-28 10:28:55,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-28 10:28:55,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-28 10:28:55,496 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-28 10:28:55,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:55,496 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-28 10:28:55,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-28 10:28:55,497 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-28 10:28:55,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-28 10:28:55,497 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:55,497 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-28 10:28:55,498 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:55,498 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:55,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-28 10:28:55,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:55,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:55,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:55,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:55,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:55,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:55,801 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:55,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:28:55,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-28 10:28:55,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:55,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:56,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:56,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-28 10:28:56,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-28 10:28:56,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-28 10:28:56,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:56,094 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-28 10:28:56,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:56,291 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-28 10:28:56,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-28 10:28:56,292 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-28 10:28:56,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:56,293 INFO L225 Difference]: With dead ends: 22 [2018-09-28 10:28:56,293 INFO L226 Difference]: Without dead ends: 20 [2018-09-28 10:28:56,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:56,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-28 10:28:56,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-28 10:28:56,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-28 10:28:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-28 10:28:56,297 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-28 10:28:56,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:56,298 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-28 10:28:56,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-28 10:28:56,298 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-28 10:28:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-28 10:28:56,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:56,299 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-28 10:28:56,299 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:56,299 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:56,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-28 10:28:56,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:56,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:56,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:56,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:56,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:56,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:56,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:56,421 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:28:56,440 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:28:56,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:56,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:56,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:56,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-28 10:28:56,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-28 10:28:56,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-28 10:28:56,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:56,818 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-28 10:28:57,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:57,091 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-28 10:28:57,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-28 10:28:57,093 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-28 10:28:57,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:57,093 INFO L225 Difference]: With dead ends: 23 [2018-09-28 10:28:57,093 INFO L226 Difference]: Without dead ends: 21 [2018-09-28 10:28:57,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:57,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-28 10:28:57,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-28 10:28:57,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-28 10:28:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-28 10:28:57,096 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-28 10:28:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:57,097 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-28 10:28:57,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-28 10:28:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-28 10:28:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-28 10:28:57,098 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:57,098 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-28 10:28:57,098 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:57,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:57,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-28 10:28:57,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:57,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:57,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:57,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:57,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:57,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:57,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:57,562 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:28:57,579 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-28 10:28:57,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:57,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:57,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:57,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-28 10:28:57,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-28 10:28:57,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-28 10:28:57,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:57,679 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-28 10:28:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:57,813 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-28 10:28:57,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-28 10:28:57,813 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-28 10:28:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:57,814 INFO L225 Difference]: With dead ends: 24 [2018-09-28 10:28:57,814 INFO L226 Difference]: Without dead ends: 22 [2018-09-28 10:28:57,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:57,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-28 10:28:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-28 10:28:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-28 10:28:57,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-28 10:28:57,819 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-28 10:28:57,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:57,819 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-28 10:28:57,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-28 10:28:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-28 10:28:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-28 10:28:57,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:57,820 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-28 10:28:57,821 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:57,821 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:57,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-28 10:28:57,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:57,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:57,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:57,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:57,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:57,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:57,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:57,982 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:28:58,022 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-28 10:28:58,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:58,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:58,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:58,110 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-28 10:28:58,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-28 10:28:58,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-28 10:28:58,111 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:58,111 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-28 10:28:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:58,268 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-28 10:28:58,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-28 10:28:58,269 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-28 10:28:58,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:58,270 INFO L225 Difference]: With dead ends: 25 [2018-09-28 10:28:58,270 INFO L226 Difference]: Without dead ends: 23 [2018-09-28 10:28:58,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:58,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-28 10:28:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-28 10:28:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-28 10:28:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-28 10:28:58,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-28 10:28:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:58,275 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-28 10:28:58,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-28 10:28:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-28 10:28:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-28 10:28:58,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:58,276 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-28 10:28:58,276 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:58,276 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:58,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-28 10:28:58,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:58,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:58,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:58,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:58,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:58,524 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:58,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:58,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:58,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:58,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:58,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:58,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-28 10:28:58,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-28 10:28:58,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-28 10:28:58,758 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:58,758 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-28 10:28:58,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:58,920 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-28 10:28:58,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-28 10:28:58,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-28 10:28:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:58,923 INFO L225 Difference]: With dead ends: 26 [2018-09-28 10:28:58,923 INFO L226 Difference]: Without dead ends: 24 [2018-09-28 10:28:58,923 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:58,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-28 10:28:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-28 10:28:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-28 10:28:58,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-28 10:28:58,926 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-28 10:28:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:58,926 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-28 10:28:58,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-28 10:28:58,927 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-28 10:28:58,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-28 10:28:58,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:58,927 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-28 10:28:58,928 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:58,928 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:58,928 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-28 10:28:58,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:58,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:58,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:58,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:28:58,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:59,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:59,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:59,212 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:28:59,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:28:59,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:59,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:28:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:59,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:28:59,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-28 10:28:59,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-28 10:28:59,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-28 10:28:59,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:28:59,432 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-28 10:28:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:28:59,592 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-28 10:28:59,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-28 10:28:59,592 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-28 10:28:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:28:59,593 INFO L225 Difference]: With dead ends: 27 [2018-09-28 10:28:59,593 INFO L226 Difference]: Without dead ends: 25 [2018-09-28 10:28:59,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:28:59,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-28 10:28:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-28 10:28:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-28 10:28:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-28 10:28:59,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-28 10:28:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:28:59,598 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-28 10:28:59,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-28 10:28:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-28 10:28:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-28 10:28:59,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:28:59,599 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-28 10:28:59,599 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:28:59,599 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:28:59,599 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-28 10:28:59,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:28:59,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:28:59,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:59,601 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:28:59,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:28:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:28:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:28:59,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:28:59,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:28:59,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:28:59,817 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-28 10:28:59,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:28:59,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:00,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:00,107 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-28 10:29:00,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-28 10:29:00,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-28 10:29:00,108 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:00,108 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-28 10:29:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:00,387 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-28 10:29:00,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-28 10:29:00,391 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-28 10:29:00,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:00,391 INFO L225 Difference]: With dead ends: 28 [2018-09-28 10:29:00,392 INFO L226 Difference]: Without dead ends: 26 [2018-09-28 10:29:00,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:00,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-28 10:29:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-28 10:29:00,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-28 10:29:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-28 10:29:00,395 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-28 10:29:00,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:00,395 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-28 10:29:00,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-28 10:29:00,395 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-28 10:29:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-28 10:29:00,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:00,396 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-28 10:29:00,396 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:00,397 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:00,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-28 10:29:00,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:00,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:00,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:00,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:00,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:00,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:00,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:00,592 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:00,612 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:00,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:00,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:00,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:00,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-28 10:29:00,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-28 10:29:00,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-28 10:29:00,794 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:00,794 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-28 10:29:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:01,092 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-28 10:29:01,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-28 10:29:01,092 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-28 10:29:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:01,093 INFO L225 Difference]: With dead ends: 29 [2018-09-28 10:29:01,093 INFO L226 Difference]: Without dead ends: 27 [2018-09-28 10:29:01,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-28 10:29:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-28 10:29:01,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-28 10:29:01,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-28 10:29:01,096 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-28 10:29:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:01,097 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-28 10:29:01,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-28 10:29:01,097 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-28 10:29:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-28 10:29:01,097 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:01,098 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-28 10:29:01,098 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:01,098 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:01,098 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-28 10:29:01,098 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:01,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:01,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:01,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:01,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:01,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:01,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:01,289 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:01,307 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-28 10:29:01,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:01,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:01,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:01,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-28 10:29:01,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-28 10:29:01,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-28 10:29:01,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:01,418 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-28 10:29:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:01,713 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-28 10:29:01,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-28 10:29:01,714 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-28 10:29:01,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:01,715 INFO L225 Difference]: With dead ends: 30 [2018-09-28 10:29:01,715 INFO L226 Difference]: Without dead ends: 28 [2018-09-28 10:29:01,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-28 10:29:01,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-28 10:29:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-28 10:29:01,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-28 10:29:01,719 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-28 10:29:01,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:01,719 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-28 10:29:01,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-28 10:29:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-28 10:29:01,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-28 10:29:01,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:01,721 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-28 10:29:01,721 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:01,721 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:01,721 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-28 10:29:01,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:01,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:01,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:01,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:01,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:01,977 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:01,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:01,985 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:02,007 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-28 10:29:02,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:02,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:02,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:02,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-28 10:29:02,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-28 10:29:02,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-28 10:29:02,210 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:02,210 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-28 10:29:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:02,377 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-28 10:29:02,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-28 10:29:02,378 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-28 10:29:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:02,379 INFO L225 Difference]: With dead ends: 31 [2018-09-28 10:29:02,379 INFO L226 Difference]: Without dead ends: 29 [2018-09-28 10:29:02,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-28 10:29:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-28 10:29:02,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-28 10:29:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-28 10:29:02,385 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-28 10:29:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:02,385 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-28 10:29:02,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-28 10:29:02,385 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-28 10:29:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-28 10:29:02,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:02,386 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-28 10:29:02,386 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:02,387 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:02,387 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-28 10:29:02,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:02,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:02,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:02,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:02,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:02,530 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:02,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:02,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:02,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:02,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:02,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-28 10:29:02,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-28 10:29:02,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-28 10:29:02,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:02,727 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-28 10:29:02,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:02,909 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-28 10:29:02,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-28 10:29:02,910 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-28 10:29:02,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:02,910 INFO L225 Difference]: With dead ends: 32 [2018-09-28 10:29:02,911 INFO L226 Difference]: Without dead ends: 30 [2018-09-28 10:29:02,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:02,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-28 10:29:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-28 10:29:02,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-28 10:29:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-28 10:29:02,914 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-28 10:29:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:02,915 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-28 10:29:02,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-28 10:29:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-28 10:29:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-28 10:29:02,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:02,916 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-28 10:29:02,916 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:02,916 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:02,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-28 10:29:02,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:02,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:02,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:02,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:02,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:03,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:03,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:03,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:03,499 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:03,499 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:03,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:03,554 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:03,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:03,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-28 10:29:03,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-28 10:29:03,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-28 10:29:03,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:03,577 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-28 10:29:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:03,811 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-28 10:29:03,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-28 10:29:03,812 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-28 10:29:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:03,813 INFO L225 Difference]: With dead ends: 33 [2018-09-28 10:29:03,813 INFO L226 Difference]: Without dead ends: 31 [2018-09-28 10:29:03,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:03,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-28 10:29:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-28 10:29:03,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-28 10:29:03,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-28 10:29:03,816 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-28 10:29:03,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:03,816 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-28 10:29:03,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-28 10:29:03,816 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-28 10:29:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-28 10:29:03,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:03,817 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-28 10:29:03,817 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:03,817 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:03,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-28 10:29:03,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:03,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:03,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:03,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:03,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:04,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:04,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:04,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:04,974 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-28 10:29:04,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:04,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:05,069 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:05,069 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-28 10:29:05,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-28 10:29:05,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-28 10:29:05,070 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:05,070 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-28 10:29:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:05,265 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-28 10:29:05,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-28 10:29:05,265 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-28 10:29:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:05,266 INFO L225 Difference]: With dead ends: 34 [2018-09-28 10:29:05,266 INFO L226 Difference]: Without dead ends: 32 [2018-09-28 10:29:05,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:05,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-28 10:29:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-28 10:29:05,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-28 10:29:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-28 10:29:05,271 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-28 10:29:05,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:05,272 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-28 10:29:05,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-28 10:29:05,272 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-28 10:29:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-28 10:29:05,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:05,273 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-28 10:29:05,273 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:05,273 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:05,273 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-28 10:29:05,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:05,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:05,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:05,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:05,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:05,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:05,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:05,465 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:05,484 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:05,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:05,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:05,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:05,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-28 10:29:05,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-28 10:29:05,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-28 10:29:05,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:05,565 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-28 10:29:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:05,722 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-28 10:29:05,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-28 10:29:05,723 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-28 10:29:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:05,724 INFO L225 Difference]: With dead ends: 35 [2018-09-28 10:29:05,724 INFO L226 Difference]: Without dead ends: 33 [2018-09-28 10:29:05,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-28 10:29:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-28 10:29:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-28 10:29:05,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-28 10:29:05,731 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-28 10:29:05,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:05,731 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-28 10:29:05,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-28 10:29:05,732 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-28 10:29:05,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-28 10:29:05,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:05,733 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-28 10:29:05,733 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:05,733 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:05,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-28 10:29:05,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:05,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:05,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:05,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:05,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:05,968 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:05,968 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:05,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:06,053 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-28 10:29:06,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:06,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:06,169 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:06,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-28 10:29:06,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-28 10:29:06,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-28 10:29:06,170 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:06,170 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-28 10:29:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:06,322 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-28 10:29:06,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-28 10:29:06,323 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-28 10:29:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:06,323 INFO L225 Difference]: With dead ends: 36 [2018-09-28 10:29:06,324 INFO L226 Difference]: Without dead ends: 34 [2018-09-28 10:29:06,324 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-28 10:29:06,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-28 10:29:06,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-28 10:29:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-28 10:29:06,329 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-28 10:29:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:06,329 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-28 10:29:06,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-28 10:29:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-28 10:29:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-28 10:29:06,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:06,330 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-28 10:29:06,330 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:06,330 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:06,330 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-28 10:29:06,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:06,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:06,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:06,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:06,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:07,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:07,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:07,295 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:07,320 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-28 10:29:07,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:07,322 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:07,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:07,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-28 10:29:07,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-28 10:29:07,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-28 10:29:07,446 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:07,446 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-28 10:29:07,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:07,717 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-28 10:29:07,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-28 10:29:07,717 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-28 10:29:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:07,718 INFO L225 Difference]: With dead ends: 37 [2018-09-28 10:29:07,718 INFO L226 Difference]: Without dead ends: 35 [2018-09-28 10:29:07,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:07,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-28 10:29:07,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-28 10:29:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-28 10:29:07,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-28 10:29:07,721 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-28 10:29:07,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:07,722 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-28 10:29:07,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-28 10:29:07,722 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-28 10:29:07,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-28 10:29:07,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:07,722 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-28 10:29:07,722 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:07,723 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-28 10:29:07,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:07,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:07,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:07,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:07,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:07,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:07,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:07,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:07,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:08,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:08,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-28 10:29:08,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-28 10:29:08,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-28 10:29:08,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:08,013 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-28 10:29:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:08,267 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-28 10:29:08,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-28 10:29:08,268 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-28 10:29:08,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:08,268 INFO L225 Difference]: With dead ends: 38 [2018-09-28 10:29:08,268 INFO L226 Difference]: Without dead ends: 36 [2018-09-28 10:29:08,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:08,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-28 10:29:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-28 10:29:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-28 10:29:08,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-28 10:29:08,272 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-28 10:29:08,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:08,272 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-28 10:29:08,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-28 10:29:08,273 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-28 10:29:08,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-28 10:29:08,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:08,273 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-28 10:29:08,273 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:08,273 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:08,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-28 10:29:08,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:08,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:08,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:08,275 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:08,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:08,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:08,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:08,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:08,528 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:08,528 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:08,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:08,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:08,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-28 10:29:08,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-28 10:29:08,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-28 10:29:08,632 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:08,633 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-28 10:29:08,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:08,881 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-28 10:29:08,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-28 10:29:08,881 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-28 10:29:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:08,882 INFO L225 Difference]: With dead ends: 39 [2018-09-28 10:29:08,882 INFO L226 Difference]: Without dead ends: 37 [2018-09-28 10:29:08,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-28 10:29:08,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-28 10:29:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-28 10:29:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-28 10:29:08,886 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-28 10:29:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:08,886 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-28 10:29:08,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-28 10:29:08,886 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-28 10:29:08,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-28 10:29:08,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:08,887 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-28 10:29:08,887 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:08,887 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:08,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-28 10:29:08,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:08,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:08,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:08,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:08,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:09,364 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:09,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:09,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:09,400 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-28 10:29:09,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:09,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:09,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:09,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-28 10:29:09,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-28 10:29:09,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-28 10:29:09,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:09,497 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-28 10:29:09,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:09,649 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-28 10:29:09,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-28 10:29:09,650 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-28 10:29:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:09,650 INFO L225 Difference]: With dead ends: 40 [2018-09-28 10:29:09,650 INFO L226 Difference]: Without dead ends: 38 [2018-09-28 10:29:09,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-28 10:29:09,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-28 10:29:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-28 10:29:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-28 10:29:09,653 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-28 10:29:09,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:09,653 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-28 10:29:09,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-28 10:29:09,653 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-28 10:29:09,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-28 10:29:09,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:09,654 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-28 10:29:09,654 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:09,654 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:09,654 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-28 10:29:09,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:09,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:09,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:09,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:09,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:10,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:10,102 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 [2018-09-28 10:29:10,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:10,141 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:10,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:10,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:10,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:10,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-28 10:29:10,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-28 10:29:10,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-28 10:29:10,338 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:10,338 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-28 10:29:10,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:10,573 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-28 10:29:10,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-28 10:29:10,574 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-28 10:29:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:10,575 INFO L225 Difference]: With dead ends: 41 [2018-09-28 10:29:10,575 INFO L226 Difference]: Without dead ends: 39 [2018-09-28 10:29:10,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:10,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-28 10:29:10,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-28 10:29:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-28 10:29:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-28 10:29:10,577 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-28 10:29:10,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:10,578 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-28 10:29:10,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-28 10:29:10,578 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-28 10:29:10,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-28 10:29:10,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:10,579 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-28 10:29:10,579 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:10,579 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:10,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-28 10:29:10,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:10,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:10,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:10,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:10,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:10,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:10,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:10,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:10,806 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-28 10:29:10,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:10,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:10,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:10,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-28 10:29:10,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-28 10:29:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-28 10:29:10,928 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:10,928 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-28 10:29:11,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:11,258 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-28 10:29:11,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-28 10:29:11,258 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-28 10:29:11,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:11,259 INFO L225 Difference]: With dead ends: 42 [2018-09-28 10:29:11,259 INFO L226 Difference]: Without dead ends: 40 [2018-09-28 10:29:11,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:11,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-28 10:29:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-28 10:29:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-28 10:29:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-28 10:29:11,262 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-28 10:29:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:11,263 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-28 10:29:11,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-28 10:29:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-28 10:29:11,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-28 10:29:11,263 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:11,263 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-28 10:29:11,263 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:11,264 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:11,264 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-28 10:29:11,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:11,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:11,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:11,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:11,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:11,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:11,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:11,744 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:11,771 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-28 10:29:11,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:11,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:12,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:12,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-28 10:29:12,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-28 10:29:12,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-28 10:29:12,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:12,795 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-28 10:29:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:13,462 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-28 10:29:13,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-28 10:29:13,462 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-28 10:29:13,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:13,463 INFO L225 Difference]: With dead ends: 43 [2018-09-28 10:29:13,463 INFO L226 Difference]: Without dead ends: 41 [2018-09-28 10:29:13,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:13,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-28 10:29:13,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-28 10:29:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-28 10:29:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-28 10:29:13,466 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-28 10:29:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:13,466 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-28 10:29:13,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-28 10:29:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-28 10:29:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-28 10:29:13,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:13,467 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-28 10:29:13,467 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:13,467 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:13,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-28 10:29:13,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:13,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:13,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:13,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:13,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:13,691 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:13,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:13,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:13,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:13,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:13,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:13,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-28 10:29:13,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-28 10:29:13,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-28 10:29:13,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:13,844 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-28 10:29:14,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:14,119 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-28 10:29:14,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-28 10:29:14,120 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-28 10:29:14,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:14,121 INFO L225 Difference]: With dead ends: 44 [2018-09-28 10:29:14,121 INFO L226 Difference]: Without dead ends: 42 [2018-09-28 10:29:14,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-28 10:29:14,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-28 10:29:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-28 10:29:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-28 10:29:14,124 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-28 10:29:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:14,124 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-28 10:29:14,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-28 10:29:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-28 10:29:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-28 10:29:14,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:14,125 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-28 10:29:14,125 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:14,125 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:14,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-28 10:29:14,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:14,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:14,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:14,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:14,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:14,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:14,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:14,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:14,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:14,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:14,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:14,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:14,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-28 10:29:14,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-28 10:29:14,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-28 10:29:14,585 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:14,585 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-28 10:29:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:14,866 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-28 10:29:14,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-28 10:29:14,867 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-28 10:29:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:14,867 INFO L225 Difference]: With dead ends: 45 [2018-09-28 10:29:14,867 INFO L226 Difference]: Without dead ends: 43 [2018-09-28 10:29:14,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-28 10:29:14,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-28 10:29:14,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-28 10:29:14,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-28 10:29:14,870 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-28 10:29:14,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:14,871 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-28 10:29:14,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-28 10:29:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-28 10:29:14,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-28 10:29:14,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:14,871 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-28 10:29:14,872 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:14,872 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:14,872 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-28 10:29:14,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:14,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:14,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:14,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:14,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:15,290 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:15,290 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:15,300 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:15,329 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-28 10:29:15,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:15,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:15,434 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:15,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:15,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-28 10:29:15,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-28 10:29:15,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-28 10:29:15,456 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:15,456 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-28 10:29:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:15,707 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-28 10:29:15,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-28 10:29:15,707 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-28 10:29:15,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:15,708 INFO L225 Difference]: With dead ends: 46 [2018-09-28 10:29:15,708 INFO L226 Difference]: Without dead ends: 44 [2018-09-28 10:29:15,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-28 10:29:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-28 10:29:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-28 10:29:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-28 10:29:15,710 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-28 10:29:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:15,710 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-28 10:29:15,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-28 10:29:15,711 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-28 10:29:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-28 10:29:15,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:15,711 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-28 10:29:15,711 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:15,712 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:15,712 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-28 10:29:15,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:15,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:15,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:15,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:15,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:16,375 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:16,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:16,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:16,391 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:16,413 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:16,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:16,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:16,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:16,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-28 10:29:16,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-28 10:29:16,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-28 10:29:16,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:16,526 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-28 10:29:16,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:16,876 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-28 10:29:16,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-28 10:29:16,877 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-28 10:29:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:16,877 INFO L225 Difference]: With dead ends: 47 [2018-09-28 10:29:16,878 INFO L226 Difference]: Without dead ends: 45 [2018-09-28 10:29:16,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:16,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-28 10:29:16,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-28 10:29:16,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-28 10:29:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-28 10:29:16,880 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-28 10:29:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:16,881 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-28 10:29:16,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-28 10:29:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-28 10:29:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-28 10:29:16,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:16,881 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-28 10:29:16,882 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:16,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-28 10:29:16,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:16,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:16,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:16,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:16,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:17,264 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:17,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:17,265 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:17,272 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:17,318 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-28 10:29:17,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:17,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:17,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:17,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-28 10:29:17,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-28 10:29:17,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-28 10:29:17,472 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:17,472 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-28 10:29:17,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:17,836 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-28 10:29:17,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-28 10:29:17,837 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-28 10:29:17,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:17,838 INFO L225 Difference]: With dead ends: 48 [2018-09-28 10:29:17,838 INFO L226 Difference]: Without dead ends: 46 [2018-09-28 10:29:17,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:17,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-28 10:29:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-28 10:29:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-28 10:29:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-28 10:29:17,840 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-28 10:29:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:17,840 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-28 10:29:17,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-28 10:29:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-28 10:29:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-28 10:29:17,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:17,840 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-28 10:29:17,841 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:17,841 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-28 10:29:17,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:17,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:17,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:17,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:17,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:18,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:18,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:18,086 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:18,117 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-28 10:29:18,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:18,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:18,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:18,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-28 10:29:18,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-28 10:29:18,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-28 10:29:18,242 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:18,242 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-28 10:29:18,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:18,551 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-28 10:29:18,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-28 10:29:18,552 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-28 10:29:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:18,552 INFO L225 Difference]: With dead ends: 49 [2018-09-28 10:29:18,552 INFO L226 Difference]: Without dead ends: 47 [2018-09-28 10:29:18,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-28 10:29:18,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-28 10:29:18,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-28 10:29:18,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-28 10:29:18,555 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-28 10:29:18,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:18,555 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-28 10:29:18,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-28 10:29:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-28 10:29:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-28 10:29:18,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:18,556 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-28 10:29:18,556 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:18,556 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:18,556 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-28 10:29:18,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:18,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:18,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:18,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:18,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:18,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:18,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:18,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:18,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:18,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:18,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-28 10:29:18,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-28 10:29:18,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-28 10:29:18,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:18,955 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-28 10:29:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:19,335 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-28 10:29:19,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-28 10:29:19,336 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-28 10:29:19,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:19,337 INFO L225 Difference]: With dead ends: 50 [2018-09-28 10:29:19,337 INFO L226 Difference]: Without dead ends: 48 [2018-09-28 10:29:19,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:19,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-28 10:29:19,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-28 10:29:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-28 10:29:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-28 10:29:19,339 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-28 10:29:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:19,339 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-28 10:29:19,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-28 10:29:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-28 10:29:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-28 10:29:19,339 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:19,340 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-28 10:29:19,340 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:19,340 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:19,340 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-28 10:29:19,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:19,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:19,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:19,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:19,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:19,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:19,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:19,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:19,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:19,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:19,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:19,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:19,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-28 10:29:19,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-28 10:29:19,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-28 10:29:19,839 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:19,839 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-28 10:29:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:20,161 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-28 10:29:20,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-28 10:29:20,162 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-28 10:29:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:20,163 INFO L225 Difference]: With dead ends: 51 [2018-09-28 10:29:20,163 INFO L226 Difference]: Without dead ends: 49 [2018-09-28 10:29:20,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-28 10:29:20,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-28 10:29:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-28 10:29:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-28 10:29:20,166 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-28 10:29:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:20,166 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-28 10:29:20,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-28 10:29:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-28 10:29:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-28 10:29:20,167 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:20,167 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-28 10:29:20,167 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:20,167 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-28 10:29:20,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:20,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:20,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:20,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:20,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:20,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:20,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:20,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:20,613 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-28 10:29:20,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:20,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:20,753 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:20,753 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-28 10:29:20,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-28 10:29:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-28 10:29:20,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:20,754 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-28 10:29:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:21,219 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-28 10:29:21,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-28 10:29:21,219 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-28 10:29:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:21,220 INFO L225 Difference]: With dead ends: 52 [2018-09-28 10:29:21,220 INFO L226 Difference]: Without dead ends: 50 [2018-09-28 10:29:21,220 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-28 10:29:21,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-28 10:29:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-28 10:29:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-28 10:29:21,222 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-28 10:29:21,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:21,223 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-28 10:29:21,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-28 10:29:21,223 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-28 10:29:21,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-28 10:29:21,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:21,223 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-28 10:29:21,224 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:21,224 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:21,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-28 10:29:21,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:21,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:21,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:21,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:21,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:22,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:22,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:22,178 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:22,207 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:22,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:22,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:22,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:22,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-28 10:29:22,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-28 10:29:22,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-28 10:29:22,387 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:22,387 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-28 10:29:22,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:22,881 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-28 10:29:22,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-28 10:29:22,882 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-28 10:29:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:22,882 INFO L225 Difference]: With dead ends: 53 [2018-09-28 10:29:22,883 INFO L226 Difference]: Without dead ends: 51 [2018-09-28 10:29:22,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-28 10:29:22,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-28 10:29:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-28 10:29:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-28 10:29:22,885 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-28 10:29:22,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:22,885 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-28 10:29:22,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-28 10:29:22,885 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-28 10:29:22,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-28 10:29:22,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:22,885 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-28 10:29:22,886 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:22,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:22,886 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-28 10:29:22,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:22,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:22,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:22,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:22,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:23,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:23,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:23,429 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:23,466 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-28 10:29:23,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:23,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:23,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:23,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-28 10:29:23,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-28 10:29:23,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-28 10:29:23,580 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:23,580 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-28 10:29:23,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:23,864 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-28 10:29:23,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-28 10:29:23,865 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-28 10:29:23,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:23,865 INFO L225 Difference]: With dead ends: 54 [2018-09-28 10:29:23,866 INFO L226 Difference]: Without dead ends: 52 [2018-09-28 10:29:23,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:23,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-28 10:29:23,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-28 10:29:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-28 10:29:23,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-28 10:29:23,868 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-28 10:29:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:23,869 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-28 10:29:23,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-28 10:29:23,869 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-28 10:29:23,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-28 10:29:23,869 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:23,869 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-28 10:29:23,870 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:23,870 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:23,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-28 10:29:23,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:23,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:23,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:23,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:23,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:23,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:24,178 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:24,178 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:24,185 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:24,229 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-28 10:29:24,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:24,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:24,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:24,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-28 10:29:24,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-28 10:29:24,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-28 10:29:24,341 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:24,341 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-28 10:29:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:24,597 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-28 10:29:24,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-28 10:29:24,598 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-28 10:29:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:24,599 INFO L225 Difference]: With dead ends: 55 [2018-09-28 10:29:24,599 INFO L226 Difference]: Without dead ends: 53 [2018-09-28 10:29:24,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:24,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-28 10:29:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-28 10:29:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-28 10:29:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-28 10:29:24,602 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-28 10:29:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:24,602 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-28 10:29:24,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-28 10:29:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-28 10:29:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-28 10:29:24,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:24,603 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-28 10:29:24,603 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:24,603 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:24,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-28 10:29:24,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:24,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:24,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:24,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:24,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:24,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:24,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:24,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:24,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:25,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:25,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-28 10:29:25,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-28 10:29:25,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-28 10:29:25,050 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:25,050 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-28 10:29:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:25,334 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-28 10:29:25,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-28 10:29:25,334 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-28 10:29:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:25,335 INFO L225 Difference]: With dead ends: 56 [2018-09-28 10:29:25,335 INFO L226 Difference]: Without dead ends: 54 [2018-09-28 10:29:25,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:25,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-28 10:29:25,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-28 10:29:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-28 10:29:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-28 10:29:25,337 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-28 10:29:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:25,338 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-28 10:29:25,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-28 10:29:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-28 10:29:25,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-28 10:29:25,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:25,339 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-28 10:29:25,339 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:25,339 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:25,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-28 10:29:25,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:25,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:25,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:25,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:25,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:25,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:25,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:25,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:25,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:25,718 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:25,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:25,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:25,845 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:25,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-28 10:29:25,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-28 10:29:25,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-28 10:29:25,846 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:25,846 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-28 10:29:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:26,144 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-28 10:29:26,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-28 10:29:26,144 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-28 10:29:26,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:26,145 INFO L225 Difference]: With dead ends: 57 [2018-09-28 10:29:26,145 INFO L226 Difference]: Without dead ends: 55 [2018-09-28 10:29:26,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:26,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-28 10:29:26,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-28 10:29:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-28 10:29:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-28 10:29:26,147 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-28 10:29:26,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:26,148 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-28 10:29:26,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-28 10:29:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-28 10:29:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-28 10:29:26,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:26,148 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-28 10:29:26,148 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:26,149 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:26,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-28 10:29:26,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:26,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:26,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:26,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:26,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:26,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:26,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:26,646 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:26,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:26,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-28 10:29:26,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:26,700 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:27,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:27,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-28 10:29:27,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-28 10:29:27,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-28 10:29:27,118 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:27,118 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-28 10:29:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:27,594 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-28 10:29:27,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-28 10:29:27,594 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-28 10:29:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:27,595 INFO L225 Difference]: With dead ends: 58 [2018-09-28 10:29:27,595 INFO L226 Difference]: Without dead ends: 56 [2018-09-28 10:29:27,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-28 10:29:27,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-28 10:29:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-28 10:29:27,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-28 10:29:27,612 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-28 10:29:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:27,612 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-28 10:29:27,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-28 10:29:27,613 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-28 10:29:27,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-28 10:29:27,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:27,613 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-28 10:29:27,613 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:27,614 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:27,614 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-28 10:29:27,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:27,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:27,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:27,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:27,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:27,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:27,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:28,002 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:28,029 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:28,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:28,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:28,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:28,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:28,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-28 10:29:28,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-28 10:29:28,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-28 10:29:28,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:28,173 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-28 10:29:28,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:28,535 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-28 10:29:28,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-28 10:29:28,536 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-28 10:29:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:28,537 INFO L225 Difference]: With dead ends: 59 [2018-09-28 10:29:28,537 INFO L226 Difference]: Without dead ends: 57 [2018-09-28 10:29:28,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-28 10:29:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-28 10:29:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-28 10:29:28,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-28 10:29:28,539 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-28 10:29:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:28,539 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-28 10:29:28,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-28 10:29:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-28 10:29:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-28 10:29:28,540 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:28,540 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-28 10:29:28,540 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:28,541 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-28 10:29:28,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:28,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:28,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:28,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:28,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:28,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:29,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:29,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:29,032 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:29,073 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-28 10:29:29,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:29,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:29,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:29,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-28 10:29:29,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-28 10:29:29,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-28 10:29:29,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:29,244 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-28 10:29:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:29,628 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-28 10:29:29,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-28 10:29:29,629 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-28 10:29:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:29,630 INFO L225 Difference]: With dead ends: 60 [2018-09-28 10:29:29,630 INFO L226 Difference]: Without dead ends: 58 [2018-09-28 10:29:29,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-28 10:29:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-28 10:29:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-28 10:29:29,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-28 10:29:29,632 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-28 10:29:29,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:29,632 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-28 10:29:29,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-28 10:29:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-28 10:29:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-28 10:29:29,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:29,633 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-28 10:29:29,633 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:29,633 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-28 10:29:29,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:29,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:29,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:29,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:29,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:29,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:29,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:29,934 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:29,976 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-28 10:29:29,977 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:29,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:30,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:30,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-28 10:29:30,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-28 10:29:30,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-28 10:29:30,230 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:30,231 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-28 10:29:30,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:30,574 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-28 10:29:30,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-28 10:29:30,578 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-28 10:29:30,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:30,579 INFO L225 Difference]: With dead ends: 61 [2018-09-28 10:29:30,579 INFO L226 Difference]: Without dead ends: 59 [2018-09-28 10:29:30,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-28 10:29:30,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-28 10:29:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-28 10:29:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-28 10:29:30,581 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-28 10:29:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:30,581 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-28 10:29:30,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-28 10:29:30,581 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-28 10:29:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-28 10:29:30,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:30,581 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-28 10:29:30,582 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:30,582 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:30,582 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-28 10:29:30,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:30,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:30,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:30,583 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:30,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:30,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:30,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:30,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:30,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:31,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:31,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-28 10:29:31,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-28 10:29:31,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-28 10:29:31,062 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:31,062 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-28 10:29:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:31,483 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-28 10:29:31,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-28 10:29:31,483 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-28 10:29:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:31,484 INFO L225 Difference]: With dead ends: 62 [2018-09-28 10:29:31,484 INFO L226 Difference]: Without dead ends: 60 [2018-09-28 10:29:31,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-28 10:29:31,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-28 10:29:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-28 10:29:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-28 10:29:31,486 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-28 10:29:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:31,486 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-28 10:29:31,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-28 10:29:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-28 10:29:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-28 10:29:31,487 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:31,487 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-28 10:29:31,487 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:31,487 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:31,487 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-28 10:29:31,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:31,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:31,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:31,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:31,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:31,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:31,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:31,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:31,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:31,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:31,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:32,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:32,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-28 10:29:32,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-28 10:29:32,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-28 10:29:32,006 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:32,006 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-28 10:29:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:32,412 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-28 10:29:32,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-28 10:29:32,412 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-28 10:29:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:32,412 INFO L225 Difference]: With dead ends: 63 [2018-09-28 10:29:32,413 INFO L226 Difference]: Without dead ends: 61 [2018-09-28 10:29:32,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-28 10:29:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-28 10:29:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-28 10:29:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-28 10:29:32,415 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-28 10:29:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:32,415 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-28 10:29:32,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-28 10:29:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-28 10:29:32,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-28 10:29:32,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:32,416 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-28 10:29:32,416 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:32,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:32,417 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-28 10:29:32,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:32,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:32,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:32,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:32,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:32,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:32,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:32,848 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:32,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-28 10:29:32,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:32,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:33,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:33,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-28 10:29:33,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-28 10:29:33,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-28 10:29:33,039 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:33,039 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-28 10:29:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:33,463 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-28 10:29:33,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-28 10:29:33,464 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-28 10:29:33,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:33,464 INFO L225 Difference]: With dead ends: 64 [2018-09-28 10:29:33,464 INFO L226 Difference]: Without dead ends: 62 [2018-09-28 10:29:33,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-28 10:29:33,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-28 10:29:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-28 10:29:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-28 10:29:33,468 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-28 10:29:33,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:33,468 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-28 10:29:33,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-28 10:29:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-28 10:29:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-28 10:29:33,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:33,469 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-28 10:29:33,469 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:33,469 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:33,469 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-28 10:29:33,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:33,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:33,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:33,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:33,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:34,005 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:34,005 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:34,016 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:34,050 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:34,050 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:34,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:34,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:34,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-28 10:29:34,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-28 10:29:34,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-28 10:29:34,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:34,189 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-28 10:29:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:34,609 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-28 10:29:34,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-28 10:29:34,610 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-28 10:29:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:34,611 INFO L225 Difference]: With dead ends: 65 [2018-09-28 10:29:34,611 INFO L226 Difference]: Without dead ends: 63 [2018-09-28 10:29:34,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-28 10:29:34,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-28 10:29:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-28 10:29:34,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-28 10:29:34,614 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-28 10:29:34,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:34,614 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-28 10:29:34,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-28 10:29:34,614 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-28 10:29:34,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-28 10:29:34,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:34,615 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-28 10:29:34,615 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:34,615 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:34,615 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-28 10:29:34,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:34,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:34,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:34,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:34,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:35,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:35,369 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:35,377 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:35,424 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-28 10:29:35,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:35,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:35,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:35,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-28 10:29:35,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-28 10:29:35,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-28 10:29:35,639 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:35,639 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-28 10:29:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:36,099 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-28 10:29:36,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-28 10:29:36,099 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-28 10:29:36,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:36,100 INFO L225 Difference]: With dead ends: 66 [2018-09-28 10:29:36,100 INFO L226 Difference]: Without dead ends: 64 [2018-09-28 10:29:36,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-28 10:29:36,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-28 10:29:36,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-28 10:29:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-28 10:29:36,102 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-28 10:29:36,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:36,102 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-28 10:29:36,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-28 10:29:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-28 10:29:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-28 10:29:36,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:36,103 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-28 10:29:36,103 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:36,103 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:36,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-28 10:29:36,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:36,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:36,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:36,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:36,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:36,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:36,532 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:36,540 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:36,586 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-28 10:29:36,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:36,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:36,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:36,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-28 10:29:36,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-28 10:29:36,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-28 10:29:36,720 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:36,720 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-28 10:29:37,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:37,109 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-28 10:29:37,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-28 10:29:37,109 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-28 10:29:37,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:37,110 INFO L225 Difference]: With dead ends: 67 [2018-09-28 10:29:37,110 INFO L226 Difference]: Without dead ends: 65 [2018-09-28 10:29:37,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-28 10:29:37,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-28 10:29:37,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-28 10:29:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-28 10:29:37,112 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-28 10:29:37,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:37,112 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-28 10:29:37,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-28 10:29:37,112 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-28 10:29:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-28 10:29:37,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:37,113 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-28 10:29:37,113 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:37,113 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-28 10:29:37,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:37,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:37,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:37,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:37,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:37,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:37,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:37,459 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:37,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:37,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:37,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:37,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-28 10:29:37,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-28 10:29:37,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-28 10:29:37,676 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:37,676 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-28 10:29:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:38,215 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-28 10:29:38,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-28 10:29:38,216 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-28 10:29:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:38,217 INFO L225 Difference]: With dead ends: 68 [2018-09-28 10:29:38,217 INFO L226 Difference]: Without dead ends: 66 [2018-09-28 10:29:38,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:38,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-28 10:29:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-28 10:29:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-28 10:29:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-28 10:29:38,219 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-28 10:29:38,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:38,219 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-28 10:29:38,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-28 10:29:38,219 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-28 10:29:38,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-28 10:29:38,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:38,220 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-28 10:29:38,220 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:38,220 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:38,220 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-28 10:29:38,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:38,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:38,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:38,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:38,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:38,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:38,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:38,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:38,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:38,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:38,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:38,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:38,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-28 10:29:38,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-28 10:29:38,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-28 10:29:38,728 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:38,728 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-28 10:29:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:39,170 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-28 10:29:39,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-28 10:29:39,170 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-28 10:29:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:39,171 INFO L225 Difference]: With dead ends: 69 [2018-09-28 10:29:39,171 INFO L226 Difference]: Without dead ends: 67 [2018-09-28 10:29:39,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:39,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-28 10:29:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-28 10:29:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-28 10:29:39,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-28 10:29:39,174 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-28 10:29:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:39,174 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-28 10:29:39,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-28 10:29:39,174 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-28 10:29:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-28 10:29:39,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:39,174 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-28 10:29:39,175 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:39,175 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:39,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-28 10:29:39,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:39,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:39,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:39,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:39,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:39,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:39,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:39,507 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:39,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-28 10:29:39,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:39,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:39,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:39,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-28 10:29:39,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-28 10:29:39,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-28 10:29:39,703 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:39,703 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-28 10:29:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:40,206 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-28 10:29:40,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-28 10:29:40,206 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-28 10:29:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:40,207 INFO L225 Difference]: With dead ends: 70 [2018-09-28 10:29:40,207 INFO L226 Difference]: Without dead ends: 68 [2018-09-28 10:29:40,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-28 10:29:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-28 10:29:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-28 10:29:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-28 10:29:40,209 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-28 10:29:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:40,209 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-28 10:29:40,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-28 10:29:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-28 10:29:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-28 10:29:40,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:40,210 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-28 10:29:40,210 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:40,210 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:40,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-28 10:29:40,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:40,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:40,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:40,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:40,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:40,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:40,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:40,568 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:40,626 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:40,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:40,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:40,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:40,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-28 10:29:40,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-28 10:29:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-28 10:29:40,776 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:40,777 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-28 10:29:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:41,267 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-28 10:29:41,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-28 10:29:41,267 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-28 10:29:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:41,268 INFO L225 Difference]: With dead ends: 71 [2018-09-28 10:29:41,268 INFO L226 Difference]: Without dead ends: 69 [2018-09-28 10:29:41,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:41,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-28 10:29:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-28 10:29:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-28 10:29:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-28 10:29:41,270 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-28 10:29:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:41,270 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-28 10:29:41,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-28 10:29:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-28 10:29:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-28 10:29:41,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:41,271 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-28 10:29:41,271 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:41,271 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:41,271 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-28 10:29:41,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:41,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:41,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:41,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:41,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:41,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:41,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:41,594 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:41,647 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-28 10:29:41,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:41,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:41,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:41,832 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-28 10:29:41,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-28 10:29:41,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-28 10:29:41,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:41,834 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-28 10:29:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:42,339 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-28 10:29:42,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-28 10:29:42,340 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-28 10:29:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:42,340 INFO L225 Difference]: With dead ends: 72 [2018-09-28 10:29:42,340 INFO L226 Difference]: Without dead ends: 70 [2018-09-28 10:29:42,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:42,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-28 10:29:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-28 10:29:42,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-28 10:29:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-28 10:29:42,342 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-28 10:29:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:42,342 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-28 10:29:42,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-28 10:29:42,343 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-28 10:29:42,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-28 10:29:42,343 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:42,343 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-28 10:29:42,343 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:42,343 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:42,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-28 10:29:42,344 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:42,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:42,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:42,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:42,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:42,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:42,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:42,663 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:42,720 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-28 10:29:42,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:42,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:42,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:42,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-28 10:29:42,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-28 10:29:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-28 10:29:42,940 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:42,940 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-28 10:29:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:43,328 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-28 10:29:43,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-28 10:29:43,328 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-28 10:29:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:43,329 INFO L225 Difference]: With dead ends: 73 [2018-09-28 10:29:43,329 INFO L226 Difference]: Without dead ends: 71 [2018-09-28 10:29:43,329 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-28 10:29:43,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-28 10:29:43,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-28 10:29:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-28 10:29:43,331 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-28 10:29:43,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:43,331 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-28 10:29:43,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-28 10:29:43,331 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-28 10:29:43,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-28 10:29:43,332 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:43,332 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-28 10:29:43,332 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:43,332 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:43,333 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-28 10:29:43,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:43,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:43,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:43,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:43,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:43,703 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:43,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:43,710 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:43,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:43,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:43,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-28 10:29:43,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-28 10:29:43,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-28 10:29:43,900 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:43,901 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-28 10:29:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:44,426 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-28 10:29:44,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-28 10:29:44,426 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-28 10:29:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:44,427 INFO L225 Difference]: With dead ends: 74 [2018-09-28 10:29:44,427 INFO L226 Difference]: Without dead ends: 72 [2018-09-28 10:29:44,428 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-28 10:29:44,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-28 10:29:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-28 10:29:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-28 10:29:44,429 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-28 10:29:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:44,430 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-28 10:29:44,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-28 10:29:44,430 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-28 10:29:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-28 10:29:44,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:44,430 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-28 10:29:44,430 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:44,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:44,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-28 10:29:44,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:44,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:44,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:44,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:44,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:44,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:44,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:44,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:44,817 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:44,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:44,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:44,974 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:44,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-28 10:29:44,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-28 10:29:44,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-28 10:29:44,976 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:44,976 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-28 10:29:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:45,341 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-28 10:29:45,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-28 10:29:45,341 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-28 10:29:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:45,342 INFO L225 Difference]: With dead ends: 75 [2018-09-28 10:29:45,342 INFO L226 Difference]: Without dead ends: 73 [2018-09-28 10:29:45,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-28 10:29:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-28 10:29:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-28 10:29:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-28 10:29:45,344 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-28 10:29:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:45,344 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-28 10:29:45,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-28 10:29:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-28 10:29:45,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-28 10:29:45,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:45,345 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-28 10:29:45,345 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:45,346 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:45,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-28 10:29:45,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:45,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:45,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:45,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:45,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:45,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:45,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:45,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:46,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-28 10:29:46,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:46,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:46,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:46,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-28 10:29:46,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-28 10:29:46,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-28 10:29:46,472 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:46,472 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-28 10:29:47,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:47,073 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-28 10:29:47,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-28 10:29:47,074 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-28 10:29:47,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:47,074 INFO L225 Difference]: With dead ends: 76 [2018-09-28 10:29:47,074 INFO L226 Difference]: Without dead ends: 74 [2018-09-28 10:29:47,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-28 10:29:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-28 10:29:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-28 10:29:47,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-28 10:29:47,078 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-28 10:29:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:47,078 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-28 10:29:47,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-28 10:29:47,079 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-28 10:29:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-28 10:29:47,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:47,079 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-28 10:29:47,079 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:47,079 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-28 10:29:47,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:47,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:47,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:47,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:47,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:47,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:47,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:47,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:47,431 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:47,489 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:47,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:47,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:47,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:47,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-28 10:29:47,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-28 10:29:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-28 10:29:47,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:47,661 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-28 10:29:48,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:48,243 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-28 10:29:48,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-28 10:29:48,243 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-28 10:29:48,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:48,243 INFO L225 Difference]: With dead ends: 77 [2018-09-28 10:29:48,244 INFO L226 Difference]: Without dead ends: 75 [2018-09-28 10:29:48,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-28 10:29:48,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-28 10:29:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-28 10:29:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-28 10:29:48,246 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-28 10:29:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:48,247 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-28 10:29:48,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-28 10:29:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-28 10:29:48,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-28 10:29:48,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:48,247 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-28 10:29:48,248 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:48,248 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:48,248 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-28 10:29:48,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:48,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:48,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:48,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:48,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:49,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:49,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:49,056 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:49,140 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-28 10:29:49,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:49,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:49,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:49,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-28 10:29:49,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-28 10:29:49,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-28 10:29:49,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:49,556 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-28 10:29:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:50,118 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-28 10:29:50,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-28 10:29:50,118 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-28 10:29:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:50,119 INFO L225 Difference]: With dead ends: 78 [2018-09-28 10:29:50,119 INFO L226 Difference]: Without dead ends: 76 [2018-09-28 10:29:50,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-28 10:29:50,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-28 10:29:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-28 10:29:50,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-28 10:29:50,123 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-28 10:29:50,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:50,124 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-28 10:29:50,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-28 10:29:50,124 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-28 10:29:50,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-28 10:29:50,124 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:50,125 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-28 10:29:50,125 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:50,125 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:50,125 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-28 10:29:50,125 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:50,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:50,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:50,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:50,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:50,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:50,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:50,559 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:29:50,620 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-28 10:29:50,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:50,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:50,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:50,802 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:50,803 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-28 10:29:50,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-28 10:29:50,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-28 10:29:50,804 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:50,804 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-28 10:29:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:51,385 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-28 10:29:51,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-28 10:29:51,385 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-28 10:29:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:51,386 INFO L225 Difference]: With dead ends: 79 [2018-09-28 10:29:51,386 INFO L226 Difference]: Without dead ends: 77 [2018-09-28 10:29:51,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:51,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-28 10:29:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-28 10:29:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-28 10:29:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-28 10:29:51,389 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-28 10:29:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:51,389 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-28 10:29:51,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-28 10:29:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-28 10:29:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-28 10:29:51,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:51,390 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-28 10:29:51,391 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:51,391 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:51,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-28 10:29:51,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:51,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:51,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:51,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:51,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:52,622 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:52,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:52,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:52,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:52,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:52,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-28 10:29:52,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-28 10:29:52,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-28 10:29:52,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:52,855 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-28 10:29:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:53,570 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-28 10:29:53,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-28 10:29:53,570 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-28 10:29:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:53,571 INFO L225 Difference]: With dead ends: 80 [2018-09-28 10:29:53,571 INFO L226 Difference]: Without dead ends: 78 [2018-09-28 10:29:53,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:53,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-28 10:29:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-28 10:29:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-28 10:29:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-28 10:29:53,573 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-28 10:29:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:53,573 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-28 10:29:53,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-28 10:29:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-28 10:29:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-28 10:29:53,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:53,574 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-28 10:29:53,574 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:53,574 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:53,574 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-28 10:29:53,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:53,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:53,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:53,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:29:53,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:53,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:53,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:53,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:29:54,003 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:29:54,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:54,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:54,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:54,195 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-28 10:29:54,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-28 10:29:54,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-28 10:29:54,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:54,197 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-28 10:29:54,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:54,798 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-28 10:29:54,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-28 10:29:54,798 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-28 10:29:54,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:54,799 INFO L225 Difference]: With dead ends: 81 [2018-09-28 10:29:54,799 INFO L226 Difference]: Without dead ends: 79 [2018-09-28 10:29:54,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-28 10:29:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-28 10:29:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-28 10:29:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-28 10:29:54,801 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-28 10:29:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:54,801 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-28 10:29:54,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-28 10:29:54,801 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-28 10:29:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-28 10:29:54,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:54,802 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-28 10:29:54,802 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:54,802 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:54,802 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-28 10:29:54,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:54,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:54,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:54,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:54,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:55,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:55,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:55,933 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:29:55,995 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-28 10:29:55,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:56,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:56,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:56,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-28 10:29:56,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-28 10:29:56,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-28 10:29:56,172 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:56,172 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-28 10:29:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:57,041 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-28 10:29:57,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-28 10:29:57,042 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-28 10:29:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:57,042 INFO L225 Difference]: With dead ends: 82 [2018-09-28 10:29:57,042 INFO L226 Difference]: Without dead ends: 80 [2018-09-28 10:29:57,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:57,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-28 10:29:57,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-28 10:29:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-28 10:29:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-28 10:29:57,047 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-28 10:29:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:57,047 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-28 10:29:57,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-28 10:29:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-28 10:29:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-28 10:29:57,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:57,047 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-28 10:29:57,048 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:57,048 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:57,048 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-28 10:29:57,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:57,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:57,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:57,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:57,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:57,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:57,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:57,594 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:29:57,649 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:29:57,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:57,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:57,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:57,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-28 10:29:57,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-28 10:29:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-28 10:29:57,883 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:57,884 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-28 10:29:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:29:58,815 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-28 10:29:58,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-28 10:29:58,815 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-28 10:29:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:29:58,816 INFO L225 Difference]: With dead ends: 83 [2018-09-28 10:29:58,816 INFO L226 Difference]: Without dead ends: 81 [2018-09-28 10:29:58,816 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:29:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-28 10:29:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-28 10:29:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-28 10:29:58,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-28 10:29:58,818 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-28 10:29:58,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:29:58,819 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-28 10:29:58,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-28 10:29:58,819 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-28 10:29:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-28 10:29:58,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:29:58,819 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-28 10:29:58,820 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:29:58,820 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:29:58,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-28 10:29:58,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:29:58,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:29:58,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:58,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:29:58,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:29:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:29:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:59,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:29:59,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:29:59,227 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:29:59,297 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-28 10:29:59,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:29:59,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:29:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:29:59,475 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:29:59,475 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-28 10:29:59,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-28 10:29:59,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-28 10:29:59,476 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:29:59,476 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-28 10:30:00,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:00,111 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-28 10:30:00,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-28 10:30:00,112 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-28 10:30:00,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:00,112 INFO L225 Difference]: With dead ends: 84 [2018-09-28 10:30:00,112 INFO L226 Difference]: Without dead ends: 82 [2018-09-28 10:30:00,113 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:00,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-28 10:30:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-28 10:30:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-28 10:30:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-28 10:30:00,114 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-28 10:30:00,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:00,115 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-28 10:30:00,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-28 10:30:00,115 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-28 10:30:00,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-28 10:30:00,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:00,116 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-28 10:30:00,116 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:00,116 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:00,116 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-28 10:30:00,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:00,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:00,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:00,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:00,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:01,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:01,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:01,070 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:30:01,307 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-28 10:30:01,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:01,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:01,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:01,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-28 10:30:01,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-28 10:30:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-28 10:30:01,495 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:01,495 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-28 10:30:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:01,951 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-28 10:30:01,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-28 10:30:01,952 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-28 10:30:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:01,952 INFO L225 Difference]: With dead ends: 85 [2018-09-28 10:30:01,952 INFO L226 Difference]: Without dead ends: 83 [2018-09-28 10:30:01,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-28 10:30:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-28 10:30:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-28 10:30:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-28 10:30:01,955 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-28 10:30:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:01,955 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-28 10:30:01,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-28 10:30:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-28 10:30:01,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-28 10:30:01,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:01,956 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-28 10:30:01,956 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:01,956 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:01,956 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-28 10:30:01,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:01,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:01,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:01,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:01,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:02,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:02,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:02,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:02,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:03,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:03,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-28 10:30:03,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-28 10:30:03,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-28 10:30:03,044 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:03,044 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-28 10:30:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:03,776 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-28 10:30:03,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-28 10:30:03,777 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-28 10:30:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:03,777 INFO L225 Difference]: With dead ends: 86 [2018-09-28 10:30:03,777 INFO L226 Difference]: Without dead ends: 84 [2018-09-28 10:30:03,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-28 10:30:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-28 10:30:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-28 10:30:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-28 10:30:03,780 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-28 10:30:03,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:03,780 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-28 10:30:03,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-28 10:30:03,780 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-28 10:30:03,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-28 10:30:03,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:03,781 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-28 10:30:03,781 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:03,781 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:03,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-28 10:30:03,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:03,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:03,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:03,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:03,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:04,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:04,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:04,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:30:04,255 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:30:04,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:04,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:05,735 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:05,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:05,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-28 10:30:05,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-28 10:30:05,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-28 10:30:05,756 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:05,756 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-28 10:30:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:06,410 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-28 10:30:06,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-28 10:30:06,411 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-28 10:30:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:06,411 INFO L225 Difference]: With dead ends: 87 [2018-09-28 10:30:06,411 INFO L226 Difference]: Without dead ends: 85 [2018-09-28 10:30:06,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-28 10:30:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-28 10:30:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-28 10:30:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-28 10:30:06,414 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-28 10:30:06,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:06,414 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-28 10:30:06,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-28 10:30:06,414 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-28 10:30:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-28 10:30:06,415 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:06,415 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-28 10:30:06,415 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:06,415 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:06,415 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-28 10:30:06,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:06,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:06,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:06,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:06,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:07,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:07,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:07,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:30:07,180 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-28 10:30:07,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:07,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:07,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:07,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-28 10:30:07,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-28 10:30:07,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-28 10:30:07,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:07,465 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-28 10:30:08,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:08,041 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-28 10:30:08,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-28 10:30:08,041 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-28 10:30:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:08,042 INFO L225 Difference]: With dead ends: 88 [2018-09-28 10:30:08,042 INFO L226 Difference]: Without dead ends: 86 [2018-09-28 10:30:08,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:08,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-28 10:30:08,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-28 10:30:08,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-28 10:30:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-28 10:30:08,044 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-28 10:30:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:08,044 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-28 10:30:08,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-28 10:30:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-28 10:30:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-28 10:30:08,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:08,045 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-28 10:30:08,045 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:08,045 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-28 10:30:08,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:08,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:08,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:08,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:08,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:08,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:08,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:08,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:08,850 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:30:08,893 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:30:08,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:08,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:10,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:10,325 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-28 10:30:10,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-28 10:30:10,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-28 10:30:10,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:10,327 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-28 10:30:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:11,609 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-28 10:30:11,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-28 10:30:11,609 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-28 10:30:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:11,610 INFO L225 Difference]: With dead ends: 89 [2018-09-28 10:30:11,610 INFO L226 Difference]: Without dead ends: 87 [2018-09-28 10:30:11,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-28 10:30:11,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-28 10:30:11,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-28 10:30:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-28 10:30:11,612 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-28 10:30:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:11,612 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-28 10:30:11,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-28 10:30:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-28 10:30:11,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-28 10:30:11,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:11,614 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-28 10:30:11,614 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:11,614 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:11,614 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-28 10:30:11,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:11,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:11,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:11,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:11,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:12,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:12,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:12,072 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:30:12,144 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-28 10:30:12,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:12,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:12,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:12,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-28 10:30:12,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-28 10:30:12,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-28 10:30:12,338 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:12,338 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-28 10:30:13,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:13,048 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-28 10:30:13,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-28 10:30:13,049 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-28 10:30:13,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:13,049 INFO L225 Difference]: With dead ends: 90 [2018-09-28 10:30:13,049 INFO L226 Difference]: Without dead ends: 88 [2018-09-28 10:30:13,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:13,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-28 10:30:13,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-28 10:30:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-28 10:30:13,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-28 10:30:13,052 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-28 10:30:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:13,052 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-28 10:30:13,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-28 10:30:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-28 10:30:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-28 10:30:13,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:13,053 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-28 10:30:13,053 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:13,053 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-28 10:30:13,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:13,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:13,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:13,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:13,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:13,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:13,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:13,969 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:30:14,043 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-28 10:30:14,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:14,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:14,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:14,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-28 10:30:14,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-28 10:30:14,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-28 10:30:14,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:14,244 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-28 10:30:14,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:14,849 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-28 10:30:14,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-28 10:30:14,849 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-28 10:30:14,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:14,850 INFO L225 Difference]: With dead ends: 91 [2018-09-28 10:30:14,850 INFO L226 Difference]: Without dead ends: 89 [2018-09-28 10:30:14,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:14,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-28 10:30:14,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-28 10:30:14,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-28 10:30:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-28 10:30:14,855 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-28 10:30:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:14,855 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-28 10:30:14,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-28 10:30:14,855 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-28 10:30:14,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-28 10:30:14,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:14,856 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-28 10:30:14,856 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:14,858 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:14,858 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-28 10:30:14,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:14,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:14,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:14,860 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:14,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:15,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:15,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:15,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:15,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:15,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:15,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-28 10:30:15,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-28 10:30:15,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-28 10:30:15,663 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:15,663 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-28 10:30:16,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:16,194 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-28 10:30:16,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-28 10:30:16,195 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-28 10:30:16,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:16,196 INFO L225 Difference]: With dead ends: 92 [2018-09-28 10:30:16,196 INFO L226 Difference]: Without dead ends: 90 [2018-09-28 10:30:16,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-28 10:30:16,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-28 10:30:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-28 10:30:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-28 10:30:16,198 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-28 10:30:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:16,199 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-28 10:30:16,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-28 10:30:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-28 10:30:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-28 10:30:16,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:16,200 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-28 10:30:16,200 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:16,200 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:16,200 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-28 10:30:16,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:16,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:16,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:16,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:16,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:16,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:16,667 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:16,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:30:16,720 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:30:16,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:16,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:16,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:16,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-28 10:30:16,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-28 10:30:16,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-28 10:30:16,919 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:16,919 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-28 10:30:17,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:17,428 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-28 10:30:17,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-28 10:30:17,428 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-28 10:30:17,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:17,429 INFO L225 Difference]: With dead ends: 93 [2018-09-28 10:30:17,429 INFO L226 Difference]: Without dead ends: 91 [2018-09-28 10:30:17,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:17,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-28 10:30:17,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-28 10:30:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-28 10:30:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-28 10:30:17,431 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-28 10:30:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:17,431 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-28 10:30:17,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-28 10:30:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-28 10:30:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-28 10:30:17,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:17,432 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-28 10:30:17,432 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:17,432 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-28 10:30:17,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:17,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:17,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:17,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:17,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:17,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:17,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:18,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:30:18,075 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-28 10:30:18,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:18,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:18,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:18,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-28 10:30:18,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-28 10:30:18,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-28 10:30:18,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:18,274 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-28 10:30:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:18,833 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-28 10:30:18,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-28 10:30:18,833 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-28 10:30:18,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:18,834 INFO L225 Difference]: With dead ends: 94 [2018-09-28 10:30:18,834 INFO L226 Difference]: Without dead ends: 92 [2018-09-28 10:30:18,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:18,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-28 10:30:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-28 10:30:18,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-28 10:30:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-28 10:30:18,836 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-28 10:30:18,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:18,836 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-28 10:30:18,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-28 10:30:18,836 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-28 10:30:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-28 10:30:18,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:18,837 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-28 10:30:18,837 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:18,837 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:18,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-28 10:30:18,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:18,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:18,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:18,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:18,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:19,425 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:19,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:19,432 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:30:19,478 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:30:19,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:19,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:19,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:19,683 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:19,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-28 10:30:19,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-28 10:30:19,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-28 10:30:19,685 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:19,685 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-28 10:30:20,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:20,227 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-28 10:30:20,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-28 10:30:20,227 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-28 10:30:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:20,228 INFO L225 Difference]: With dead ends: 95 [2018-09-28 10:30:20,228 INFO L226 Difference]: Without dead ends: 93 [2018-09-28 10:30:20,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-28 10:30:20,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-28 10:30:20,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-28 10:30:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-28 10:30:20,230 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-28 10:30:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:20,230 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-28 10:30:20,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-28 10:30:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-28 10:30:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-28 10:30:20,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:20,231 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-28 10:30:20,231 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:20,231 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:20,231 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-28 10:30:20,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:20,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:20,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:20,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:20,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:20,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:20,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:20,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:20,733 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:30:20,822 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-28 10:30:20,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:20,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:21,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:21,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-28 10:30:21,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-28 10:30:21,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-28 10:30:21,024 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:21,024 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-28 10:30:21,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:21,572 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-28 10:30:21,573 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-28 10:30:21,573 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-28 10:30:21,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:21,573 INFO L225 Difference]: With dead ends: 96 [2018-09-28 10:30:21,573 INFO L226 Difference]: Without dead ends: 94 [2018-09-28 10:30:21,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:21,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-28 10:30:21,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-28 10:30:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-28 10:30:21,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-28 10:30:21,575 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-28 10:30:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:21,576 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-28 10:30:21,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-28 10:30:21,576 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-28 10:30:21,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-28 10:30:21,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:21,576 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-28 10:30:21,576 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:21,576 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-28 10:30:21,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:21,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:21,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:21,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:21,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:22,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:22,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:22,053 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:30:22,132 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-28 10:30:22,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:22,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:22,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:22,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-28 10:30:22,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-28 10:30:22,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-28 10:30:22,333 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:22,333 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-28 10:30:23,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:23,019 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-28 10:30:23,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-28 10:30:23,019 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-28 10:30:23,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:23,020 INFO L225 Difference]: With dead ends: 97 [2018-09-28 10:30:23,020 INFO L226 Difference]: Without dead ends: 95 [2018-09-28 10:30:23,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-28 10:30:23,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-28 10:30:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-28 10:30:23,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-28 10:30:23,022 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-28 10:30:23,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:23,023 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-28 10:30:23,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-28 10:30:23,023 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-28 10:30:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-28 10:30:23,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:23,023 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-28 10:30:23,024 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:23,024 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-28 10:30:23,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:23,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:23,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:23,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:23,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:23,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:23,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:23,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:23,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:24,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:24,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-28 10:30:24,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-28 10:30:24,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-28 10:30:24,079 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:24,079 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-28 10:30:25,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:25,011 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-28 10:30:25,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-28 10:30:25,011 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-28 10:30:25,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:25,012 INFO L225 Difference]: With dead ends: 98 [2018-09-28 10:30:25,012 INFO L226 Difference]: Without dead ends: 96 [2018-09-28 10:30:25,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-28 10:30:25,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-28 10:30:25,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-28 10:30:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-28 10:30:25,014 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-28 10:30:25,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:25,014 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-28 10:30:25,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-28 10:30:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-28 10:30:25,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-28 10:30:25,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:25,015 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-28 10:30:25,015 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:25,015 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:25,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-28 10:30:25,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:25,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:25,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:25,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:25,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:25,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:25,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:25,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:25,489 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:30:25,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:30:25,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:25,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:25,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:25,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-28 10:30:25,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-28 10:30:25,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-28 10:30:25,807 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:25,807 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-28 10:30:26,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:26,416 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-28 10:30:26,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-28 10:30:26,417 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-28 10:30:26,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:26,417 INFO L225 Difference]: With dead ends: 99 [2018-09-28 10:30:26,417 INFO L226 Difference]: Without dead ends: 97 [2018-09-28 10:30:26,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-28 10:30:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-28 10:30:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-28 10:30:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-28 10:30:26,420 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-28 10:30:26,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:26,420 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-28 10:30:26,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-28 10:30:26,420 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-28 10:30:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-28 10:30:26,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:26,420 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-28 10:30:26,421 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:26,421 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:26,421 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-28 10:30:26,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:26,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:26,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:26,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:26,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:27,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:27,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:27,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:30:27,387 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-28 10:30:27,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:27,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:27,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:27,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-28 10:30:27,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-28 10:30:27,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-28 10:30:27,800 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:27,800 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-28 10:30:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:28,543 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-28 10:30:28,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-28 10:30:28,544 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-28 10:30:28,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:28,544 INFO L225 Difference]: With dead ends: 100 [2018-09-28 10:30:28,544 INFO L226 Difference]: Without dead ends: 98 [2018-09-28 10:30:28,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-28 10:30:28,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-28 10:30:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-28 10:30:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-28 10:30:28,547 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-28 10:30:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:28,547 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-28 10:30:28,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-28 10:30:28,547 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-28 10:30:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-28 10:30:28,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:28,547 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-28 10:30:28,548 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:28,548 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:28,548 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-28 10:30:28,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:28,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:28,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:28,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:28,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:29,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:29,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:29,234 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:30:29,283 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:30:29,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:29,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:29,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:29,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-28 10:30:29,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-28 10:30:29,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-28 10:30:29,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:29,501 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-28 10:30:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:30,082 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-28 10:30:30,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-28 10:30:30,082 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-28 10:30:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:30,083 INFO L225 Difference]: With dead ends: 101 [2018-09-28 10:30:30,083 INFO L226 Difference]: Without dead ends: 99 [2018-09-28 10:30:30,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-28 10:30:30,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-28 10:30:30,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-28 10:30:30,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-28 10:30:30,086 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-28 10:30:30,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:30,086 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-28 10:30:30,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-28 10:30:30,086 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-28 10:30:30,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-28 10:30:30,087 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:30,087 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-28 10:30:30,087 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:30,087 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:30,087 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-28 10:30:30,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:30,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:30,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:30,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:30,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:30,597 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:30,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:30,605 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:30:30,695 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-28 10:30:30,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:30,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:30,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:30,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-28 10:30:30,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-28 10:30:30,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-28 10:30:30,920 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:30,920 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-28 10:30:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:31,786 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-28 10:30:31,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-28 10:30:31,787 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-28 10:30:31,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:31,787 INFO L225 Difference]: With dead ends: 102 [2018-09-28 10:30:31,787 INFO L226 Difference]: Without dead ends: 100 [2018-09-28 10:30:31,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:31,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-28 10:30:31,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-28 10:30:31,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-28 10:30:31,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-28 10:30:31,790 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-28 10:30:31,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:31,790 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-28 10:30:31,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-28 10:30:31,790 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-28 10:30:31,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-28 10:30:31,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:31,791 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-28 10:30:31,791 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:31,791 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:31,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-28 10:30:31,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:31,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:31,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:31,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:31,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:32,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:32,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:32,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:30:32,432 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-28 10:30:32,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:32,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:32,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:32,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-28 10:30:32,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-28 10:30:32,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-28 10:30:32,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:32,671 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-28 10:30:33,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:33,297 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-28 10:30:33,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-28 10:30:33,298 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-28 10:30:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:33,298 INFO L225 Difference]: With dead ends: 103 [2018-09-28 10:30:33,299 INFO L226 Difference]: Without dead ends: 101 [2018-09-28 10:30:33,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:33,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-28 10:30:33,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-28 10:30:33,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-28 10:30:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-28 10:30:33,302 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-28 10:30:33,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:33,302 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-28 10:30:33,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-28 10:30:33,302 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-28 10:30:33,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-28 10:30:33,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:33,303 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-28 10:30:33,303 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:33,303 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:33,303 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-28 10:30:33,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:33,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:33,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:33,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:33,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:33,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:33,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:33,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:33,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:34,195 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:34,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-28 10:30:34,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-28 10:30:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-28 10:30:34,197 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:34,198 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-28 10:30:34,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:34,941 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-28 10:30:34,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-28 10:30:34,941 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-28 10:30:34,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:34,942 INFO L225 Difference]: With dead ends: 104 [2018-09-28 10:30:34,942 INFO L226 Difference]: Without dead ends: 102 [2018-09-28 10:30:34,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:34,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-28 10:30:34,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-28 10:30:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-28 10:30:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-28 10:30:34,944 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-28 10:30:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:34,944 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-28 10:30:34,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-28 10:30:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-28 10:30:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-28 10:30:34,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:34,945 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-28 10:30:34,945 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:34,945 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:34,945 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-28 10:30:34,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:34,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:34,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:34,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:34,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:35,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:35,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:35,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:30:35,547 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:30:35,548 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:35,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:35,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:35,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-28 10:30:35,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-28 10:30:35,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-28 10:30:35,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:35,786 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-28 10:30:36,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:36,775 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-28 10:30:36,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-28 10:30:36,776 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-28 10:30:36,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:36,776 INFO L225 Difference]: With dead ends: 105 [2018-09-28 10:30:36,776 INFO L226 Difference]: Without dead ends: 103 [2018-09-28 10:30:36,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-28 10:30:36,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-28 10:30:36,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-28 10:30:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-28 10:30:36,779 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-28 10:30:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:36,779 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-28 10:30:36,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-28 10:30:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-28 10:30:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-28 10:30:36,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:36,779 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-28 10:30:36,780 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:36,780 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:36,780 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-28 10:30:36,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:36,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:36,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:36,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:36,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:37,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:37,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:37,318 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:30:37,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-28 10:30:37,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:37,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:37,637 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:37,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-28 10:30:37,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-28 10:30:37,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-28 10:30:37,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:37,640 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-28 10:30:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:38,726 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-28 10:30:38,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-28 10:30:38,727 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-28 10:30:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:38,727 INFO L225 Difference]: With dead ends: 106 [2018-09-28 10:30:38,727 INFO L226 Difference]: Without dead ends: 104 [2018-09-28 10:30:38,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-28 10:30:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-28 10:30:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-28 10:30:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-28 10:30:38,730 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-28 10:30:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:38,730 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-28 10:30:38,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-28 10:30:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-28 10:30:38,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-28 10:30:38,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:38,731 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-28 10:30:38,732 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:38,732 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:38,732 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-28 10:30:38,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:38,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:38,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:38,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:38,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:39,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:39,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:39,502 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:30:39,557 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:30:39,557 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:39,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:39,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:39,801 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-28 10:30:39,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-28 10:30:39,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-28 10:30:39,803 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:39,803 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-28 10:30:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:40,819 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-28 10:30:40,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-28 10:30:40,819 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-28 10:30:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:40,820 INFO L225 Difference]: With dead ends: 107 [2018-09-28 10:30:40,820 INFO L226 Difference]: Without dead ends: 105 [2018-09-28 10:30:40,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:40,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-28 10:30:40,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-28 10:30:40,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-28 10:30:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-28 10:30:40,823 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-28 10:30:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:40,823 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-28 10:30:40,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-28 10:30:40,823 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-28 10:30:40,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-28 10:30:40,824 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:40,824 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-28 10:30:40,824 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:40,825 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:40,825 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-28 10:30:40,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:40,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:40,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:40,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:40,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:41,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:41,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:41,420 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:30:41,525 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-28 10:30:41,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:41,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:41,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:41,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-28 10:30:41,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-28 10:30:41,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-28 10:30:41,760 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:41,760 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-28 10:30:42,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:42,842 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-28 10:30:42,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-28 10:30:42,842 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-28 10:30:42,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:42,843 INFO L225 Difference]: With dead ends: 108 [2018-09-28 10:30:42,843 INFO L226 Difference]: Without dead ends: 106 [2018-09-28 10:30:42,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-28 10:30:42,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-28 10:30:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-28 10:30:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-28 10:30:42,853 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-28 10:30:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:42,853 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-28 10:30:42,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-28 10:30:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-28 10:30:42,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-28 10:30:42,854 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:42,854 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-28 10:30:42,854 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:42,854 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:42,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-28 10:30:42,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:42,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:42,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:42,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:42,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:43,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:43,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:43,528 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:30:43,619 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-28 10:30:43,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:43,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:43,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:43,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-28 10:30:43,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-28 10:30:43,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-28 10:30:43,862 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:43,862 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-28 10:30:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:44,966 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-28 10:30:44,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-28 10:30:44,967 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-28 10:30:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:44,967 INFO L225 Difference]: With dead ends: 109 [2018-09-28 10:30:44,967 INFO L226 Difference]: Without dead ends: 107 [2018-09-28 10:30:44,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-28 10:30:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-28 10:30:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-28 10:30:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-28 10:30:44,970 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-28 10:30:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:44,970 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-28 10:30:44,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-28 10:30:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-28 10:30:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-28 10:30:44,971 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:44,971 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-28 10:30:44,971 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:44,971 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-28 10:30:44,972 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:44,972 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:44,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:44,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:44,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:45,554 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:45,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:45,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:45,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:45,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:45,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:45,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-28 10:30:45,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-28 10:30:45,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-28 10:30:45,890 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:45,890 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-28 10:30:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:46,641 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-28 10:30:46,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-28 10:30:46,641 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-28 10:30:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:46,642 INFO L225 Difference]: With dead ends: 110 [2018-09-28 10:30:46,642 INFO L226 Difference]: Without dead ends: 108 [2018-09-28 10:30:46,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-28 10:30:46,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-28 10:30:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-28 10:30:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-28 10:30:46,644 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-28 10:30:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:46,644 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-28 10:30:46,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-28 10:30:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-28 10:30:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-28 10:30:46,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:46,645 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-28 10:30:46,645 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:46,645 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-28 10:30:46,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:46,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:46,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:46,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:46,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:47,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:47,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:47,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:30:47,368 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:30:47,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:47,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:47,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:47,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-28 10:30:47,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-28 10:30:47,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-28 10:30:47,700 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:47,700 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-28 10:30:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:48,595 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-28 10:30:48,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-28 10:30:48,595 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-28 10:30:48,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:48,595 INFO L225 Difference]: With dead ends: 111 [2018-09-28 10:30:48,595 INFO L226 Difference]: Without dead ends: 109 [2018-09-28 10:30:48,596 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-28 10:30:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-28 10:30:48,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-28 10:30:48,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-28 10:30:48,599 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-28 10:30:48,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:48,600 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-28 10:30:48,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-28 10:30:48,600 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-28 10:30:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-28 10:30:48,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:48,601 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-28 10:30:48,601 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:48,601 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:48,601 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-28 10:30:48,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:48,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:48,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:48,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:48,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:49,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:49,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:49,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:30:49,321 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-28 10:30:49,321 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:49,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:49,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:49,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-28 10:30:49,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-28 10:30:49,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-28 10:30:49,714 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:49,714 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-28 10:30:50,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:50,882 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-28 10:30:50,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-28 10:30:50,883 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-28 10:30:50,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:50,883 INFO L225 Difference]: With dead ends: 112 [2018-09-28 10:30:50,883 INFO L226 Difference]: Without dead ends: 110 [2018-09-28 10:30:50,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-28 10:30:50,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-28 10:30:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-28 10:30:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-28 10:30:50,886 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-28 10:30:50,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:50,886 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-28 10:30:50,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-28 10:30:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-28 10:30:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-28 10:30:50,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:50,887 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-28 10:30:50,887 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:50,887 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-28 10:30:50,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:50,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:50,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:50,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:50,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:51,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:51,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:51,479 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:30:51,533 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:30:51,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:51,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:51,783 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:51,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-28 10:30:51,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-28 10:30:51,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-28 10:30:51,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:51,786 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-28 10:30:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:52,889 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-28 10:30:52,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-28 10:30:52,890 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-28 10:30:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:52,890 INFO L225 Difference]: With dead ends: 113 [2018-09-28 10:30:52,890 INFO L226 Difference]: Without dead ends: 111 [2018-09-28 10:30:52,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:52,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-28 10:30:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-28 10:30:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-28 10:30:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-28 10:30:52,893 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-28 10:30:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:52,893 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-28 10:30:52,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-28 10:30:52,893 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-28 10:30:52,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-28 10:30:52,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:52,894 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-28 10:30:52,894 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:52,894 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-28 10:30:52,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:52,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:52,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:52,895 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:52,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:53,496 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:53,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:53,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:53,504 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:30:53,613 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-28 10:30:53,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:53,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:53,866 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:53,866 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-28 10:30:53,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-28 10:30:53,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-28 10:30:53,868 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:53,868 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-28 10:30:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:55,131 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-28 10:30:55,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-28 10:30:55,131 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-28 10:30:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:55,131 INFO L225 Difference]: With dead ends: 114 [2018-09-28 10:30:55,132 INFO L226 Difference]: Without dead ends: 112 [2018-09-28 10:30:55,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-28 10:30:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-28 10:30:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-28 10:30:55,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-28 10:30:55,134 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-28 10:30:55,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:55,134 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-28 10:30:55,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-28 10:30:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-28 10:30:55,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-28 10:30:55,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:55,135 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-28 10:30:55,135 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:55,135 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:55,135 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-28 10:30:55,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:55,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:55,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:55,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:55,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:55,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:55,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:55,735 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:30:55,838 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-28 10:30:55,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:30:55,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:56,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:56,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-28 10:30:56,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-28 10:30:56,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-28 10:30:56,087 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:56,087 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-28 10:30:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:56,956 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-28 10:30:56,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-28 10:30:56,956 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-28 10:30:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:56,957 INFO L225 Difference]: With dead ends: 115 [2018-09-28 10:30:56,957 INFO L226 Difference]: Without dead ends: 113 [2018-09-28 10:30:56,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:56,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-28 10:30:56,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-28 10:30:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-28 10:30:56,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-28 10:30:56,959 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-28 10:30:56,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:56,959 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-28 10:30:56,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-28 10:30:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-28 10:30:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-28 10:30:56,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:56,960 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-28 10:30:56,960 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:56,960 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:56,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-28 10:30:56,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:56,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:56,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:56,961 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:30:56,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:57,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:30:57,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:30:57,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:30:57,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:30:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:30:57,897 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:30:57,897 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-28 10:30:57,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-28 10:30:57,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-28 10:30:57,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:30:57,899 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-28 10:30:59,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:30:59,193 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-28 10:30:59,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-28 10:30:59,193 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-28 10:30:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:30:59,194 INFO L225 Difference]: With dead ends: 116 [2018-09-28 10:30:59,194 INFO L226 Difference]: Without dead ends: 114 [2018-09-28 10:30:59,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:30:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-28 10:30:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-28 10:30:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-28 10:30:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-28 10:30:59,197 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-28 10:30:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:30:59,197 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-28 10:30:59,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-28 10:30:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-28 10:30:59,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-28 10:30:59,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:30:59,198 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-28 10:30:59,198 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:30:59,198 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:30:59,198 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-09-28 10:30:59,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:30:59,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:30:59,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:59,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:30:59,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:30:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:00,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:00,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:00,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:00,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:00,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:00,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:00,340 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:00,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-28 10:31:00,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-28 10:31:00,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-28 10:31:00,343 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:00,343 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-28 10:31:01,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:01,643 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-28 10:31:01,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-28 10:31:01,644 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-28 10:31:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:01,644 INFO L225 Difference]: With dead ends: 117 [2018-09-28 10:31:01,644 INFO L226 Difference]: Without dead ends: 115 [2018-09-28 10:31:01,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:01,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-28 10:31:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-28 10:31:01,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-28 10:31:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-28 10:31:01,647 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-28 10:31:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:01,647 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-28 10:31:01,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-28 10:31:01,647 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-28 10:31:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-28 10:31:01,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:01,648 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-28 10:31:01,648 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:01,649 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:01,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1489203976, now seen corresponding path program 111 times [2018-09-28 10:31:01,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:01,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:01,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:01,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:01,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:02,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:02,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:02,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:02,495 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-28 10:31:02,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:02,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:02,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:02,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-28 10:31:02,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-28 10:31:02,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-28 10:31:02,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:02,765 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-28 10:31:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:03,997 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-28 10:31:03,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-28 10:31:03,997 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-28 10:31:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:03,998 INFO L225 Difference]: With dead ends: 118 [2018-09-28 10:31:03,998 INFO L226 Difference]: Without dead ends: 116 [2018-09-28 10:31:03,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:03,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-28 10:31:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-28 10:31:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-28 10:31:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-28 10:31:04,000 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-28 10:31:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:04,000 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-28 10:31:04,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-28 10:31:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-28 10:31:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-28 10:31:04,001 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:04,001 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-28 10:31:04,001 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:04,001 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1079318975, now seen corresponding path program 112 times [2018-09-28 10:31:04,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:04,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:04,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:04,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:04,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:04,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:04,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:04,726 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:04,787 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:04,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:04,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:05,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:05,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-28 10:31:05,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-28 10:31:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-28 10:31:05,273 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:05,273 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-28 10:31:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:06,376 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-28 10:31:06,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-28 10:31:06,376 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-28 10:31:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:06,376 INFO L225 Difference]: With dead ends: 119 [2018-09-28 10:31:06,376 INFO L226 Difference]: Without dead ends: 117 [2018-09-28 10:31:06,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-28 10:31:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-28 10:31:06,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-28 10:31:06,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-28 10:31:06,379 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-28 10:31:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:06,379 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-28 10:31:06,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-28 10:31:06,379 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-28 10:31:06,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-28 10:31:06,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:06,379 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-28 10:31:06,380 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:06,380 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:06,380 INFO L82 PathProgramCache]: Analyzing trace with hash 900848168, now seen corresponding path program 113 times [2018-09-28 10:31:06,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:06,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:06,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:06,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:06,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:07,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:07,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:07,268 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:07,399 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-28 10:31:07,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:07,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:07,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:07,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-28 10:31:07,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-28 10:31:07,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-28 10:31:07,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:07,697 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-09-28 10:31:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:08,664 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-28 10:31:08,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-28 10:31:08,664 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-09-28 10:31:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:08,665 INFO L225 Difference]: With dead ends: 120 [2018-09-28 10:31:08,665 INFO L226 Difference]: Without dead ends: 118 [2018-09-28 10:31:08,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-28 10:31:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-28 10:31:08,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-28 10:31:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-28 10:31:08,667 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-28 10:31:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:08,668 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-28 10:31:08,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-28 10:31:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-28 10:31:08,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-28 10:31:08,668 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:08,668 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-28 10:31:08,668 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:08,668 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:08,669 INFO L82 PathProgramCache]: Analyzing trace with hash -2138479839, now seen corresponding path program 114 times [2018-09-28 10:31:08,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:08,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:08,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:08,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:08,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:09,315 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:09,316 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:09,322 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:09,428 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-28 10:31:09,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:09,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:09,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:09,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-28 10:31:09,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-28 10:31:09,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-28 10:31:09,705 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:09,705 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-09-28 10:31:11,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:11,008 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-28 10:31:11,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-28 10:31:11,008 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-09-28 10:31:11,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:11,008 INFO L225 Difference]: With dead ends: 121 [2018-09-28 10:31:11,008 INFO L226 Difference]: Without dead ends: 119 [2018-09-28 10:31:11,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:11,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-28 10:31:11,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-28 10:31:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-28 10:31:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-28 10:31:11,011 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-28 10:31:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:11,012 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-28 10:31:11,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-28 10:31:11,012 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-28 10:31:11,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-28 10:31:11,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:11,012 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-28 10:31:11,013 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:11,013 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:11,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1868367544, now seen corresponding path program 115 times [2018-09-28 10:31:11,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:11,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:11,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:11,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:11,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:11,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:11,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:11,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:11,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:11,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:12,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:12,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-28 10:31:12,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-28 10:31:12,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-28 10:31:12,021 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:12,021 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-09-28 10:31:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:13,240 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-28 10:31:13,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-28 10:31:13,241 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-28 10:31:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:13,241 INFO L225 Difference]: With dead ends: 122 [2018-09-28 10:31:13,241 INFO L226 Difference]: Without dead ends: 120 [2018-09-28 10:31:13,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:13,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-28 10:31:13,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-28 10:31:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-28 10:31:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-28 10:31:13,244 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-28 10:31:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:13,244 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-28 10:31:13,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-28 10:31:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-28 10:31:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-28 10:31:13,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:13,244 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-28 10:31:13,244 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:13,245 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:13,245 INFO L82 PathProgramCache]: Analyzing trace with hash -2084820991, now seen corresponding path program 116 times [2018-09-28 10:31:13,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:13,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:13,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:13,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:13,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:13,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:13,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:13,908 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:13,969 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:13,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:13,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:14,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:14,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-28 10:31:14,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-28 10:31:14,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-28 10:31:14,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:14,256 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-09-28 10:31:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:15,295 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-28 10:31:15,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-28 10:31:15,295 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-09-28 10:31:15,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:15,296 INFO L225 Difference]: With dead ends: 123 [2018-09-28 10:31:15,296 INFO L226 Difference]: Without dead ends: 121 [2018-09-28 10:31:15,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-28 10:31:15,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-28 10:31:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-28 10:31:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-28 10:31:15,298 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-28 10:31:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:15,298 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-28 10:31:15,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-28 10:31:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-28 10:31:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-28 10:31:15,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:15,299 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-28 10:31:15,299 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:15,299 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:15,299 INFO L82 PathProgramCache]: Analyzing trace with hash -204943256, now seen corresponding path program 117 times [2018-09-28 10:31:15,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:15,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:15,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:15,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:15,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:16,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:16,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:16,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:16,126 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-28 10:31:16,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:16,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:16,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:16,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-28 10:31:16,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-28 10:31:16,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-28 10:31:16,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:16,415 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-09-28 10:31:17,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:17,612 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-28 10:31:17,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-28 10:31:17,613 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-09-28 10:31:17,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:17,613 INFO L225 Difference]: With dead ends: 124 [2018-09-28 10:31:17,613 INFO L226 Difference]: Without dead ends: 122 [2018-09-28 10:31:17,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-28 10:31:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-28 10:31:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-28 10:31:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-28 10:31:17,616 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-28 10:31:17,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:17,616 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-28 10:31:17,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-28 10:31:17,616 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-28 10:31:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-28 10:31:17,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:17,616 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-28 10:31:17,617 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:17,617 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:17,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2058275615, now seen corresponding path program 118 times [2018-09-28 10:31:17,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:17,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:17,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:17,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:17,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:18,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:18,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:18,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:18,327 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:18,391 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:18,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:18,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:18,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:18,672 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-28 10:31:18,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-28 10:31:18,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-28 10:31:18,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:18,675 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-09-28 10:31:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:19,972 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-28 10:31:19,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-28 10:31:19,972 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-09-28 10:31:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:19,973 INFO L225 Difference]: With dead ends: 125 [2018-09-28 10:31:19,973 INFO L226 Difference]: Without dead ends: 123 [2018-09-28 10:31:19,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-28 10:31:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-28 10:31:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-28 10:31:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-28 10:31:19,975 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-28 10:31:19,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:19,976 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-28 10:31:19,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-28 10:31:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-28 10:31:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-28 10:31:19,976 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:19,977 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-28 10:31:19,977 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:19,977 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:19,977 INFO L82 PathProgramCache]: Analyzing trace with hash 617963400, now seen corresponding path program 119 times [2018-09-28 10:31:19,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:19,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:19,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:19,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:19,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:20,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:20,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:20,984 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:21,111 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-28 10:31:21,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:21,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:21,400 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:21,400 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-28 10:31:21,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-28 10:31:21,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-28 10:31:21,403 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:21,403 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-09-28 10:31:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:22,479 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-28 10:31:22,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-28 10:31:22,479 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-28 10:31:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:22,479 INFO L225 Difference]: With dead ends: 126 [2018-09-28 10:31:22,479 INFO L226 Difference]: Without dead ends: 124 [2018-09-28 10:31:22,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:22,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-28 10:31:22,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-28 10:31:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-28 10:31:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-28 10:31:22,482 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-28 10:31:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:22,483 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-28 10:31:22,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-28 10:31:22,483 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-28 10:31:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-28 10:31:22,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:22,483 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-28 10:31:22,484 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:22,484 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:22,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1976994241, now seen corresponding path program 120 times [2018-09-28 10:31:22,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:22,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:22,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:22,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:22,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:23,242 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:23,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:23,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:23,417 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-28 10:31:23,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:23,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:23,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:23,779 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-28 10:31:23,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-28 10:31:23,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-28 10:31:23,782 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:23,782 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-09-28 10:31:25,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:25,165 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-28 10:31:25,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-28 10:31:25,166 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-09-28 10:31:25,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:25,166 INFO L225 Difference]: With dead ends: 127 [2018-09-28 10:31:25,166 INFO L226 Difference]: Without dead ends: 125 [2018-09-28 10:31:25,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:25,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-28 10:31:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-28 10:31:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-28 10:31:25,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-28 10:31:25,168 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-28 10:31:25,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:25,168 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-28 10:31:25,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-28 10:31:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-28 10:31:25,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-28 10:31:25,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:25,169 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-28 10:31:25,169 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:25,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1157277352, now seen corresponding path program 121 times [2018-09-28 10:31:25,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:25,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:25,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:25,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:25,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:26,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:26,108 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:26,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:26,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:26,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:26,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-28 10:31:26,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-28 10:31:26,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-28 10:31:26,484 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:26,484 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-09-28 10:31:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:27,735 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-28 10:31:27,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-28 10:31:27,735 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-09-28 10:31:27,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:27,736 INFO L225 Difference]: With dead ends: 128 [2018-09-28 10:31:27,736 INFO L226 Difference]: Without dead ends: 126 [2018-09-28 10:31:27,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-28 10:31:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-28 10:31:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-28 10:31:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-28 10:31:27,738 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-28 10:31:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:27,738 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-28 10:31:27,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-28 10:31:27,738 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-28 10:31:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-28 10:31:27,738 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:27,738 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-28 10:31:27,739 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:27,739 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:27,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1515857569, now seen corresponding path program 122 times [2018-09-28 10:31:27,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:27,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:27,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:27,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:27,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:28,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:28,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:28,487 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:28,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:28,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:28,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:28,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:28,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-28 10:31:28,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-28 10:31:28,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-28 10:31:28,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:28,989 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-09-28 10:31:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:30,349 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-28 10:31:30,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-28 10:31:30,349 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-09-28 10:31:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:30,349 INFO L225 Difference]: With dead ends: 129 [2018-09-28 10:31:30,349 INFO L226 Difference]: Without dead ends: 127 [2018-09-28 10:31:30,350 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-28 10:31:30,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-28 10:31:30,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-28 10:31:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-28 10:31:30,352 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-28 10:31:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:30,352 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-28 10:31:30,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-28 10:31:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-28 10:31:30,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-28 10:31:30,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:30,353 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-28 10:31:30,353 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:30,353 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:30,353 INFO L82 PathProgramCache]: Analyzing trace with hash -253057592, now seen corresponding path program 123 times [2018-09-28 10:31:30,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:30,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:30,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:30,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:30,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:31,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:31,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:31,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:31,433 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-28 10:31:31,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:31,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:31,731 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:31,731 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-28 10:31:31,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-28 10:31:31,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-28 10:31:31,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:31,734 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-09-28 10:31:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:33,127 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-28 10:31:33,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-28 10:31:33,127 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-28 10:31:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:33,127 INFO L225 Difference]: With dead ends: 130 [2018-09-28 10:31:33,128 INFO L226 Difference]: Without dead ends: 128 [2018-09-28 10:31:33,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-28 10:31:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-28 10:31:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-28 10:31:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-28 10:31:33,130 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-28 10:31:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:33,130 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-28 10:31:33,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-28 10:31:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-28 10:31:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-28 10:31:33,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:33,130 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-28 10:31:33,131 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:33,131 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:33,131 INFO L82 PathProgramCache]: Analyzing trace with hash 745147265, now seen corresponding path program 124 times [2018-09-28 10:31:33,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:33,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:33,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:33,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:33,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:33,885 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:33,885 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:33,892 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:33,958 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:33,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:33,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:34,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:34,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-28 10:31:34,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-28 10:31:34,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-28 10:31:34,254 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:34,254 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-09-28 10:31:35,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:35,700 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-28 10:31:35,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-28 10:31:35,700 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-09-28 10:31:35,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:35,701 INFO L225 Difference]: With dead ends: 131 [2018-09-28 10:31:35,701 INFO L226 Difference]: Without dead ends: 129 [2018-09-28 10:31:35,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-28 10:31:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-28 10:31:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-28 10:31:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-28 10:31:35,703 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-28 10:31:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:35,703 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-28 10:31:35,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-28 10:31:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-28 10:31:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-28 10:31:35,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:35,704 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-28 10:31:35,704 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:35,704 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:35,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1624726760, now seen corresponding path program 125 times [2018-09-28 10:31:35,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:35,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:35,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:35,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:35,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:36,479 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:36,479 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:36,486 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:36,631 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-28 10:31:36,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:36,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:36,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:36,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:36,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-28 10:31:36,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-28 10:31:36,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-28 10:31:36,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:36,935 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-09-28 10:31:38,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:38,204 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-28 10:31:38,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-28 10:31:38,204 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-09-28 10:31:38,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:38,205 INFO L225 Difference]: With dead ends: 132 [2018-09-28 10:31:38,205 INFO L226 Difference]: Without dead ends: 130 [2018-09-28 10:31:38,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-28 10:31:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-28 10:31:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-28 10:31:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-28 10:31:38,207 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-28 10:31:38,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:38,207 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-28 10:31:38,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-28 10:31:38,207 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-28 10:31:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-28 10:31:38,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:38,208 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-28 10:31:38,208 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:38,208 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:38,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1173079967, now seen corresponding path program 126 times [2018-09-28 10:31:38,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:38,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:38,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:38,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:38,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:38,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:39,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:39,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:39,017 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:39,150 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-28 10:31:39,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:39,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:39,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:39,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-28 10:31:39,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-28 10:31:39,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-28 10:31:39,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:39,468 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-09-28 10:31:40,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:40,901 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-28 10:31:40,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-28 10:31:40,901 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-09-28 10:31:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:40,902 INFO L225 Difference]: With dead ends: 133 [2018-09-28 10:31:40,902 INFO L226 Difference]: Without dead ends: 131 [2018-09-28 10:31:40,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-28 10:31:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-28 10:31:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-28 10:31:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-28 10:31:40,904 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-28 10:31:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:40,905 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-28 10:31:40,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-28 10:31:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-28 10:31:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-28 10:31:40,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:40,905 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-28 10:31:40,906 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:40,906 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:40,906 INFO L82 PathProgramCache]: Analyzing trace with hash -2005742584, now seen corresponding path program 127 times [2018-09-28 10:31:40,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:40,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:40,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:40,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:40,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:41,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:41,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:41,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:41,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:42,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:42,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-28 10:31:42,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-28 10:31:42,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-28 10:31:42,103 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:42,103 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-09-28 10:31:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:43,493 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-28 10:31:43,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-28 10:31:43,494 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-28 10:31:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:43,495 INFO L225 Difference]: With dead ends: 134 [2018-09-28 10:31:43,495 INFO L226 Difference]: Without dead ends: 132 [2018-09-28 10:31:43,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-28 10:31:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-28 10:31:43,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-28 10:31:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-28 10:31:43,498 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-28 10:31:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:43,498 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-28 10:31:43,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-28 10:31:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-28 10:31:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-28 10:31:43,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:43,499 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-28 10:31:43,499 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:43,499 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:43,500 INFO L82 PathProgramCache]: Analyzing trace with hash -2048479935, now seen corresponding path program 128 times [2018-09-28 10:31:43,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:43,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:43,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:43,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:43,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:44,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:44,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:44,391 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:31:44,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:31:44,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:44,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:44,785 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:44,785 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-28 10:31:44,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-28 10:31:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-28 10:31:44,788 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:44,788 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-09-28 10:31:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:46,313 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-28 10:31:46,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-28 10:31:46,313 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-09-28 10:31:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:46,314 INFO L225 Difference]: With dead ends: 135 [2018-09-28 10:31:46,314 INFO L226 Difference]: Without dead ends: 133 [2018-09-28 10:31:46,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-28 10:31:46,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-28 10:31:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-28 10:31:46,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-28 10:31:46,319 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-28 10:31:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:46,320 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-28 10:31:46,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-28 10:31:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-28 10:31:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-28 10:31:46,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:46,321 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-28 10:31:46,321 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:46,321 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:46,321 INFO L82 PathProgramCache]: Analyzing trace with hash 921629480, now seen corresponding path program 129 times [2018-09-28 10:31:46,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:46,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:46,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:46,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:46,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:47,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:47,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:47,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:31:47,423 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-28 10:31:47,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:47,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:47,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:47,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-28 10:31:47,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-28 10:31:47,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-28 10:31:47,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:47,748 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-09-28 10:31:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:49,262 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-28 10:31:49,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-28 10:31:49,262 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-09-28 10:31:49,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:49,263 INFO L225 Difference]: With dead ends: 136 [2018-09-28 10:31:49,263 INFO L226 Difference]: Without dead ends: 134 [2018-09-28 10:31:49,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:49,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-28 10:31:49,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-28 10:31:49,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-28 10:31:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-28 10:31:49,266 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-28 10:31:49,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:49,267 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-28 10:31:49,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-28 10:31:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-28 10:31:49,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-28 10:31:49,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:49,268 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-28 10:31:49,268 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:49,268 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:49,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1494259167, now seen corresponding path program 130 times [2018-09-28 10:31:49,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:49,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:49,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:49,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:49,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:50,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:50,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:50,144 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:31:50,215 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:31:50,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:50,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:50,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:50,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:50,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-28 10:31:50,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-28 10:31:50,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-28 10:31:50,543 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:50,543 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-09-28 10:31:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:52,057 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-28 10:31:52,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-28 10:31:52,057 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-09-28 10:31:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:52,058 INFO L225 Difference]: With dead ends: 137 [2018-09-28 10:31:52,058 INFO L226 Difference]: Without dead ends: 135 [2018-09-28 10:31:52,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-28 10:31:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-28 10:31:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-28 10:31:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-28 10:31:52,060 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-28 10:31:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:52,060 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-28 10:31:52,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-28 10:31:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-28 10:31:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-28 10:31:52,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:52,061 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-28 10:31:52,061 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:52,061 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:52,061 INFO L82 PathProgramCache]: Analyzing trace with hash 922604104, now seen corresponding path program 131 times [2018-09-28 10:31:52,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:52,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:52,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:52,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:52,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:52,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:52,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:52,868 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:31:53,026 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-28 10:31:53,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:53,031 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:53,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:53,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-28 10:31:53,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-28 10:31:53,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-28 10:31:53,353 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:53,353 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-09-28 10:31:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:54,748 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-28 10:31:54,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-28 10:31:54,748 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-28 10:31:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:54,749 INFO L225 Difference]: With dead ends: 138 [2018-09-28 10:31:54,749 INFO L226 Difference]: Without dead ends: 136 [2018-09-28 10:31:54,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-28 10:31:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-28 10:31:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-28 10:31:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-28 10:31:54,751 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-28 10:31:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:54,751 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-28 10:31:54,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-28 10:31:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-28 10:31:54,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-28 10:31:54,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:54,752 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-28 10:31:54,752 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:54,752 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:54,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1464045823, now seen corresponding path program 132 times [2018-09-28 10:31:54,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:54,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:54,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:54,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:54,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:55,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:55,601 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:55,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:31:55,750 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-28 10:31:55,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:31:55,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:56,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:56,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-28 10:31:56,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-28 10:31:56,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-28 10:31:56,163 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:56,163 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-09-28 10:31:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:31:57,419 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-28 10:31:57,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-28 10:31:57,420 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-09-28 10:31:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:31:57,420 INFO L225 Difference]: With dead ends: 139 [2018-09-28 10:31:57,420 INFO L226 Difference]: Without dead ends: 137 [2018-09-28 10:31:57,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:31:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-28 10:31:57,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-28 10:31:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-28 10:31:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-28 10:31:57,422 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-28 10:31:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:31:57,422 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-28 10:31:57,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-28 10:31:57,422 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-28 10:31:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-28 10:31:57,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:31:57,423 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-28 10:31:57,423 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:31:57,423 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:31:57,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1859217768, now seen corresponding path program 133 times [2018-09-28 10:31:57,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:31:57,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:31:57,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:57,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:31:57,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:31:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:58,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:31:58,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:31:58,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:31:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:31:58,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:31:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:31:58,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:31:58,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-28 10:31:58,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-28 10:31:58,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-28 10:31:58,662 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:31:58,662 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-09-28 10:32:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:00,357 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-28 10:32:00,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-28 10:32:00,357 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-09-28 10:32:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:00,358 INFO L225 Difference]: With dead ends: 140 [2018-09-28 10:32:00,358 INFO L226 Difference]: Without dead ends: 138 [2018-09-28 10:32:00,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:00,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-28 10:32:00,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-28 10:32:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-28 10:32:00,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-28 10:32:00,360 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-28 10:32:00,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:00,360 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-28 10:32:00,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-28 10:32:00,360 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-28 10:32:00,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-28 10:32:00,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:00,361 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-28 10:32:00,361 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:00,361 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:00,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1801173985, now seen corresponding path program 134 times [2018-09-28 10:32:00,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:00,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:00,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:00,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:00,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:01,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:01,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:01,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:32:01,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:32:01,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:01,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:01,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:01,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-28 10:32:01,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-28 10:32:01,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-28 10:32:01,730 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:01,730 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-09-28 10:32:03,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:03,299 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-28 10:32:03,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-28 10:32:03,300 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-09-28 10:32:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:03,300 INFO L225 Difference]: With dead ends: 141 [2018-09-28 10:32:03,300 INFO L226 Difference]: Without dead ends: 139 [2018-09-28 10:32:03,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:03,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-28 10:32:03,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-28 10:32:03,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-28 10:32:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-28 10:32:03,303 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-28 10:32:03,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:03,303 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-28 10:32:03,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-28 10:32:03,303 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-28 10:32:03,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-28 10:32:03,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:03,304 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-28 10:32:03,304 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:03,304 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:03,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1816712, now seen corresponding path program 135 times [2018-09-28 10:32:03,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:03,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:03,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:03,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:03,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:04,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:04,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:04,220 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:32:04,363 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-28 10:32:04,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:04,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:04,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:04,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-28 10:32:04,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-28 10:32:04,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-28 10:32:04,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:04,698 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-09-28 10:32:05,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:05,982 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-09-28 10:32:05,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-28 10:32:05,983 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-28 10:32:05,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:05,983 INFO L225 Difference]: With dead ends: 142 [2018-09-28 10:32:05,983 INFO L226 Difference]: Without dead ends: 140 [2018-09-28 10:32:05,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:05,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-28 10:32:05,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-28 10:32:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-28 10:32:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-28 10:32:05,986 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-09-28 10:32:05,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:05,986 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-28 10:32:05,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-28 10:32:05,986 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-28 10:32:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-28 10:32:05,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:05,987 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-09-28 10:32:05,987 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:05,987 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:05,988 INFO L82 PathProgramCache]: Analyzing trace with hash 56316097, now seen corresponding path program 136 times [2018-09-28 10:32:05,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:05,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:05,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:05,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:05,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:07,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:07,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:07,130 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:32:07,201 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:32:07,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:07,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:07,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:07,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:07,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-28 10:32:07,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-28 10:32:07,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-28 10:32:07,539 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:07,540 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-09-28 10:32:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:09,324 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-28 10:32:09,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-28 10:32:09,324 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-09-28 10:32:09,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:09,324 INFO L225 Difference]: With dead ends: 143 [2018-09-28 10:32:09,324 INFO L226 Difference]: Without dead ends: 141 [2018-09-28 10:32:09,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-28 10:32:09,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-28 10:32:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-28 10:32:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-28 10:32:09,327 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-09-28 10:32:09,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:09,327 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-28 10:32:09,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-28 10:32:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-28 10:32:09,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-28 10:32:09,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:09,327 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-09-28 10:32:09,328 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:09,328 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:09,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1745797032, now seen corresponding path program 137 times [2018-09-28 10:32:09,328 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:09,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:09,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:09,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:09,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:10,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:10,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:10,242 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:32:10,410 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-28 10:32:10,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:10,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:10,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:10,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-28 10:32:10,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-28 10:32:10,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-28 10:32:10,783 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:10,783 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-09-28 10:32:12,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:12,258 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-09-28 10:32:12,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-28 10:32:12,258 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-09-28 10:32:12,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:12,258 INFO L225 Difference]: With dead ends: 144 [2018-09-28 10:32:12,259 INFO L226 Difference]: Without dead ends: 142 [2018-09-28 10:32:12,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:12,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-28 10:32:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-28 10:32:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-28 10:32:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-28 10:32:12,261 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-09-28 10:32:12,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:12,261 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-28 10:32:12,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-28 10:32:12,261 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-28 10:32:12,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-28 10:32:12,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:12,262 INFO L375 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-09-28 10:32:12,262 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:12,262 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1714868831, now seen corresponding path program 138 times [2018-09-28 10:32:12,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:12,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:12,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:12,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:12,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:13,193 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:13,193 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:13,201 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:32:13,344 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-09-28 10:32:13,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:13,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:13,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:13,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-28 10:32:13,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-28 10:32:13,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-28 10:32:13,691 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:13,691 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-09-28 10:32:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:15,664 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-28 10:32:15,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-28 10:32:15,664 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-09-28 10:32:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:15,665 INFO L225 Difference]: With dead ends: 145 [2018-09-28 10:32:15,665 INFO L226 Difference]: Without dead ends: 143 [2018-09-28 10:32:15,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-28 10:32:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-28 10:32:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-28 10:32:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-28 10:32:15,668 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-09-28 10:32:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:15,668 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-28 10:32:15,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-28 10:32:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-28 10:32:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-28 10:32:15,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:15,669 INFO L375 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-09-28 10:32:15,669 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:15,669 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:15,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1621328184, now seen corresponding path program 139 times [2018-09-28 10:32:15,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:15,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:15,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:15,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:15,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:16,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:16,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:16,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:16,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:17,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:17,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-28 10:32:17,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-28 10:32:17,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-28 10:32:17,187 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:17,188 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-09-28 10:32:18,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:18,840 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-09-28 10:32:18,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-28 10:32:18,840 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-09-28 10:32:18,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:18,841 INFO L225 Difference]: With dead ends: 146 [2018-09-28 10:32:18,841 INFO L226 Difference]: Without dead ends: 144 [2018-09-28 10:32:18,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-28 10:32:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-28 10:32:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-28 10:32:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-28 10:32:18,843 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-09-28 10:32:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:18,843 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-28 10:32:18,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-28 10:32:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-28 10:32:18,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-28 10:32:18,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:18,844 INFO L375 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-09-28 10:32:18,844 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:18,844 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:18,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1278431873, now seen corresponding path program 140 times [2018-09-28 10:32:18,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:18,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:18,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:18,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:18,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:18,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:19,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:19,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:19,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:32:19,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:32:19,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:19,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:20,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:20,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-28 10:32:20,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-28 10:32:20,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-28 10:32:20,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:20,258 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-09-28 10:32:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:22,188 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-28 10:32:22,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-28 10:32:22,188 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-09-28 10:32:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:22,189 INFO L225 Difference]: With dead ends: 147 [2018-09-28 10:32:22,189 INFO L226 Difference]: Without dead ends: 145 [2018-09-28 10:32:22,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-28 10:32:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-28 10:32:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-28 10:32:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-28 10:32:22,191 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-09-28 10:32:22,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:22,191 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-28 10:32:22,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-28 10:32:22,191 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-28 10:32:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-28 10:32:22,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:22,192 INFO L375 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-09-28 10:32:22,192 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:22,192 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:22,192 INFO L82 PathProgramCache]: Analyzing trace with hash 976680424, now seen corresponding path program 141 times [2018-09-28 10:32:22,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:22,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:22,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:22,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:22,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:23,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:23,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:23,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:32:23,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-28 10:32:23,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:23,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:23,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:23,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-28 10:32:23,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-28 10:32:23,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-28 10:32:23,636 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:23,636 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-09-28 10:32:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:25,085 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-09-28 10:32:25,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-28 10:32:25,085 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-09-28 10:32:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:25,085 INFO L225 Difference]: With dead ends: 148 [2018-09-28 10:32:25,086 INFO L226 Difference]: Without dead ends: 146 [2018-09-28 10:32:25,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-28 10:32:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-28 10:32:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-28 10:32:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-28 10:32:25,088 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-09-28 10:32:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:25,088 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-28 10:32:25,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-28 10:32:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-28 10:32:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-28 10:32:25,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:25,089 INFO L375 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-09-28 10:32:25,089 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:25,089 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:25,089 INFO L82 PathProgramCache]: Analyzing trace with hash 212320097, now seen corresponding path program 142 times [2018-09-28 10:32:25,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:25,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:25,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:25,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:25,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:26,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:26,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:26,050 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:32:26,134 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:32:26,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:26,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:26,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:26,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-28 10:32:26,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-28 10:32:26,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-28 10:32:26,569 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:26,570 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-09-28 10:32:28,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:28,539 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-28 10:32:28,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-28 10:32:28,539 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-09-28 10:32:28,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:28,539 INFO L225 Difference]: With dead ends: 149 [2018-09-28 10:32:28,539 INFO L226 Difference]: Without dead ends: 147 [2018-09-28 10:32:28,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-28 10:32:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-28 10:32:28,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-28 10:32:28,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-28 10:32:28,541 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-09-28 10:32:28,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:28,542 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-28 10:32:28,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-28 10:32:28,542 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-28 10:32:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-28 10:32:28,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:28,542 INFO L375 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-09-28 10:32:28,542 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:28,542 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2008013560, now seen corresponding path program 143 times [2018-09-28 10:32:28,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:28,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:28,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:28,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:28,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:29,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:29,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:29,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:29,487 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:32:29,660 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-28 10:32:29,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:29,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:30,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:30,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-28 10:32:30,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-28 10:32:30,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-28 10:32:30,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:30,022 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-09-28 10:32:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:31,877 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-09-28 10:32:31,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-28 10:32:31,877 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-09-28 10:32:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:31,878 INFO L225 Difference]: With dead ends: 150 [2018-09-28 10:32:31,878 INFO L226 Difference]: Without dead ends: 148 [2018-09-28 10:32:31,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-28 10:32:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-28 10:32:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-28 10:32:31,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-28 10:32:31,880 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-09-28 10:32:31,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:31,880 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-28 10:32:31,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-28 10:32:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-28 10:32:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-28 10:32:31,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:31,881 INFO L375 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-09-28 10:32:31,881 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:31,881 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:31,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2118880191, now seen corresponding path program 144 times [2018-09-28 10:32:31,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:31,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:31,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:31,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:31,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:32,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:32,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:32,914 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-28 10:32:33,066 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-28 10:32:33,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:33,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:33,410 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:33,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:33,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-28 10:32:33,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-28 10:32:33,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-28 10:32:33,435 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:33,435 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-09-28 10:32:34,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:34,963 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-28 10:32:34,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-28 10:32:34,964 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-09-28 10:32:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:34,964 INFO L225 Difference]: With dead ends: 151 [2018-09-28 10:32:34,964 INFO L226 Difference]: Without dead ends: 149 [2018-09-28 10:32:34,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-28 10:32:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-28 10:32:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-28 10:32:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-28 10:32:34,966 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-09-28 10:32:34,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:34,967 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-28 10:32:34,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-28 10:32:34,967 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-28 10:32:34,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-28 10:32:34,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:34,967 INFO L375 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-09-28 10:32:34,967 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:34,968 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:34,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1260778456, now seen corresponding path program 145 times [2018-09-28 10:32:34,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:34,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:34,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:34,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:34,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:36,022 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:36,022 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:36,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:36,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:36,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:36,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:36,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-28 10:32:36,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-28 10:32:36,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-28 10:32:36,483 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:36,483 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-09-28 10:32:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:38,415 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-09-28 10:32:38,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-28 10:32:38,415 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-09-28 10:32:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:38,416 INFO L225 Difference]: With dead ends: 152 [2018-09-28 10:32:38,416 INFO L226 Difference]: Without dead ends: 150 [2018-09-28 10:32:38,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:38,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-28 10:32:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-28 10:32:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-28 10:32:38,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-28 10:32:38,418 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-09-28 10:32:38,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:38,418 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-28 10:32:38,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-28 10:32:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-28 10:32:38,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-28 10:32:38,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:38,419 INFO L375 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-09-28 10:32:38,419 INFO L423 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:38,419 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:38,419 INFO L82 PathProgramCache]: Analyzing trace with hash -429428447, now seen corresponding path program 146 times [2018-09-28 10:32:38,419 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:38,419 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:38,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:38,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-28 10:32:38,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:39,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:39,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:39,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-28 10:32:39,482 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-28 10:32:39,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:39,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:39,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:39,846 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:39,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-09-28 10:32:39,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-28 10:32:39,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-28 10:32:39,850 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:39,850 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-09-28 10:32:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:41,870 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-28 10:32:41,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-28 10:32:41,870 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-09-28 10:32:41,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:41,870 INFO L225 Difference]: With dead ends: 153 [2018-09-28 10:32:41,871 INFO L226 Difference]: Without dead ends: 151 [2018-09-28 10:32:41,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-28 10:32:41,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-28 10:32:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-28 10:32:41,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-28 10:32:41,873 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-09-28 10:32:41,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:41,873 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-28 10:32:41,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-28 10:32:41,873 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-28 10:32:41,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-28 10:32:41,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:41,874 INFO L375 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-09-28 10:32:41,874 INFO L423 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:41,874 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:41,874 INFO L82 PathProgramCache]: Analyzing trace with hash -427381944, now seen corresponding path program 147 times [2018-09-28 10:32:41,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:41,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:41,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:41,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:41,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:43,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:43,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:43,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-28 10:32:43,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-09-28 10:32:43,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:43,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:43,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:43,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-28 10:32:43,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-28 10:32:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-28 10:32:43,660 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:43,660 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-09-28 10:32:45,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:45,733 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-09-28 10:32:45,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-28 10:32:45,733 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-09-28 10:32:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:45,733 INFO L225 Difference]: With dead ends: 154 [2018-09-28 10:32:45,733 INFO L226 Difference]: Without dead ends: 152 [2018-09-28 10:32:45,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:45,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-28 10:32:45,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-28 10:32:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-28 10:32:45,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-28 10:32:45,736 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-09-28 10:32:45,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:45,736 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-28 10:32:45,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-28 10:32:45,736 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-28 10:32:45,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-28 10:32:45,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:45,736 INFO L375 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-09-28 10:32:45,737 INFO L423 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:45,737 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:45,737 INFO L82 PathProgramCache]: Analyzing trace with hash -363940351, now seen corresponding path program 148 times [2018-09-28 10:32:45,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:45,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:45,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:45,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:45,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:46,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:46,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:46,781 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-28 10:32:46,861 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-28 10:32:46,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:46,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:47,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:47,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-09-28 10:32:47,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-09-28 10:32:47,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-09-28 10:32:47,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:47,309 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-09-28 10:32:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:49,290 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-28 10:32:49,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-28 10:32:49,290 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-09-28 10:32:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:49,290 INFO L225 Difference]: With dead ends: 155 [2018-09-28 10:32:49,290 INFO L226 Difference]: Without dead ends: 153 [2018-09-28 10:32:49,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:49,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-28 10:32:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-28 10:32:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-28 10:32:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-28 10:32:49,293 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-09-28 10:32:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:49,293 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-28 10:32:49,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-09-28 10:32:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-28 10:32:49,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-28 10:32:49,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:49,294 INFO L375 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-09-28 10:32:49,294 INFO L423 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:49,294 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:49,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1602749032, now seen corresponding path program 149 times [2018-09-28 10:32:49,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:49,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:49,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:49,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:49,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-28 10:32:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:50,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-28 10:32:50,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-28 10:32:50,345 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-28 10:32:50,537 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2018-09-28 10:32:50,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-28 10:32:50,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-28 10:32:50,923 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-28 10:32:50,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-28 10:32:50,945 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-28 10:32:50,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-28 10:32:50,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-28 10:32:50,948 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-28 10:32:50,948 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. [2018-09-28 10:32:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-28 10:32:52,677 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-09-28 10:32:52,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-09-28 10:32:52,677 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 152 [2018-09-28 10:32:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-28 10:32:52,678 INFO L225 Difference]: With dead ends: 156 [2018-09-28 10:32:52,678 INFO L226 Difference]: Without dead ends: 154 [2018-09-28 10:32:52,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-28 10:32:52,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-28 10:32:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-28 10:32:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-28 10:32:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-28 10:32:52,681 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-09-28 10:32:52,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-28 10:32:52,681 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-28 10:32:52,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-28 10:32:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-28 10:32:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-28 10:32:52,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-28 10:32:52,682 INFO L375 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-09-28 10:32:52,682 INFO L423 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-28 10:32:52,682 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-28 10:32:52,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1854389535, now seen corresponding path program 150 times [2018-09-28 10:32:52,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-28 10:32:52,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-28 10:32:52,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:52,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-28 10:32:52,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-28 10:32:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-28 10:32:53,008 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-28 10:32:53,012 WARN L206 ceAbstractionStarter]: Timeout [2018-09-28 10:32:53,013 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.09 10:32:53 BoogieIcfgContainer [2018-09-28 10:32:53,013 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-28 10:32:53,013 INFO L168 Benchmark]: Toolchain (without parser) took 244740.25 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -108.0 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 322.7 MB). Peak memory consumption was 214.7 MB. Max. memory is 7.1 GB. [2018-09-28 10:32:53,015 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:32:53,015 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.30 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:32:53,016 INFO L168 Benchmark]: Boogie Preprocessor took 18.63 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-28 10:32:53,016 INFO L168 Benchmark]: RCFGBuilder took 284.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-28 10:32:53,017 INFO L168 Benchmark]: TraceAbstraction took 244390.52 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -108.0 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 301.6 MB). Peak memory consumption was 193.6 MB. Max. memory is 7.1 GB. [2018-09-28 10:32:53,019 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 0.22 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 41.30 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 18.63 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 284.07 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 244390.52 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -108.0 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 301.6 MB). Peak memory consumption was 193.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 154 with TraceHistMax 150, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 152 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 244.3s OverallTime, 151 OverallIterations, 150 TraceHistogramMax, 112.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 450 SDtfs, 0 SDslu, 6603 SDs, 0 SdLazy, 18078 SolverSat, 255 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22948 GetRequests, 11623 SyntacticMatches, 0 SemanticMatches, 11325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=150, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 150 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 10.0s SatisfiabilityAnalysisTime, 111.2s InterpolantComputationTime, 23247 NumberOfCodeBlocks, 23247 NumberOfCodeBlocksAsserted, 3174 NumberOfCheckSat, 22948 ConstructedInterpolants, 0 QuantifiedInterpolants, 6908542 SizeOfPredicates, 149 NumberOfNonLiveVariables, 47382 ConjunctsInSsa, 11473 ConjunctsInUnsatCore, 299 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1124950 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/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-28_10-32-53-029.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-28_10-32-53-029.csv Completed graceful shutdown