java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:22:50,106 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:22:50,109 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:22:50,129 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:22:50,130 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:22:50,131 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:22:50,133 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:22:50,135 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:22:50,137 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:22:50,138 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:22:50,140 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:22:50,140 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:22:50,141 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:22:50,146 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:22:50,147 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:22:50,148 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:22:50,154 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:22:50,159 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:22:50,164 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:22:50,168 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:22:50,170 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:22:50,172 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:22:50,175 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:22:50,192 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:22:50,223 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:22:50,223 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:22:50,224 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:22:50,224 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:22:50,225 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:22:50,225 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:22:50,225 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:22:50,225 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:22:50,226 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:22:50,226 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:22:50,226 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:22:50,226 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:22:50,228 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:22:50,228 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:22:50,228 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:22:50,228 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:22:50,228 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:22:50,229 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:22:50,229 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:22:50,229 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:22:50,229 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:22:50,229 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:22:50,230 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:22:50,230 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:22:50,230 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:22:50,230 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:22:50,230 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:22:50,231 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:22:50,231 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:22:50,231 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:22:50,282 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:22:50,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:22:50,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:22:50,300 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:22:50,301 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:22:50,302 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl [2018-09-23 21:22:50,302 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/array1.i_3.bpl' [2018-09-23 21:22:50,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:22:50,355 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:22:50,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:22:50,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:22:50,356 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:22:50,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,390 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:22:50,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:22:50,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:22:50,399 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:22:50,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/1) ... [2018-09-23 21:22:50,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:22:50,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:22:50,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:22:50,419 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:22:50,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (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 [2018-09-23 21:22:50,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:22:50,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:22:50,675 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:22:50,676 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:22:50 BoogieIcfgContainer [2018-09-23 21:22:50,676 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:22:50,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:22:50,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:22:50,681 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:22:50,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:50" (1/2) ... [2018-09-23 21:22:50,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77548ec6 and model type array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:22:50, skipping insertion in model container [2018-09-23 21:22:50,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:22:50" (2/2) ... [2018-09-23 21:22:50,684 INFO L112 eAbstractionObserver]: Analyzing ICFG array1.i_3.bpl [2018-09-23 21:22:50,695 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:22:50,703 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:22:50,753 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:22:50,754 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:22:50,755 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:22:50,755 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:22:50,755 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:22:50,755 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:22:50,755 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:22:50,755 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:22:50,756 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:22:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-23 21:22:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:22:50,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:50,778 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 21:22:50,779 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:50,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:50,786 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-23 21:22:50,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:50,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:50,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:50,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:50,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:50,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:50,950 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:22:50,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:22:50,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:22:50,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:22:50,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:22:50,970 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-23 21:22:51,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:51,022 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-23 21:22:51,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:22:51,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-23 21:22:51,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:51,037 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:22:51,037 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:22:51,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:22:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:22:51,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:22:51,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:22:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 21:22:51,088 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-23 21:22:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:51,089 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 21:22:51,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:22:51,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 21:22:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:22:51,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:51,090 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-23 21:22:51,090 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:51,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:51,091 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-23 21:22:51,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:51,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:51,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:51,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:51,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:51,207 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 [2018-09-23 21:22:51,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:51,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:51,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:51,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:22:51,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:22:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:22:51,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:22:51,343 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-23 21:22:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:51,428 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 21:22:51,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:22:51,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 21:22:51,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:51,430 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:22:51,430 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:22:51,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:22:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:22:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:22:51,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:22:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 21:22:51,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-23 21:22:51,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:51,437 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 21:22:51,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:22:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 21:22:51,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:22:51,439 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:51,439 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-23 21:22:51,439 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:51,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:51,440 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-23 21:22:51,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:51,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:51,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:51,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:51,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:51,677 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 [2018-09-23 21:22:51,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:51,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:51,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:51,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:51,746 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:51,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:22:51,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:22:51,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:22:51,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:22:51,748 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-23 21:22:51,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:51,808 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 21:22:51,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:22:51,809 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-23 21:22:51,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:51,810 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:22:51,810 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:22:51,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:22:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:22:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:22:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:22:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 21:22:51,814 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-23 21:22:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:51,815 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 21:22:51,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:22:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 21:22:51,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:22:51,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:51,816 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-23 21:22:51,817 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:51,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:51,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-23 21:22:51,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:51,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:51,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:51,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:51,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:51,961 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 [2018-09-23 21:22:51,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:51,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-23 21:22:51,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:51,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:52,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:52,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:22:52,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:22:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:22:52,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:22:52,015 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-23 21:22:52,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:52,069 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 21:22:52,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:22:52,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-23 21:22:52,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:52,071 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:22:52,072 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:22:52,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:22:52,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:22:52,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:22:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:22:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 21:22:52,078 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-23 21:22:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:52,080 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 21:22:52,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:22:52,081 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 21:22:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:22:52,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:52,082 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-23 21:22:52,082 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:52,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-23 21:22:52,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:52,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:52,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:52,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:52,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:52,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:52,392 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:52,405 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:52,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:52,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:52,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:52,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:22:52,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:22:52,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:22:52,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:22:52,439 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-23 21:22:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:52,485 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 21:22:52,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:22:52,486 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-23 21:22:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:52,486 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:22:52,487 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:22:52,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:22:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:22:52,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 21:22:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:22:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 21:22:52,492 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-23 21:22:52,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:52,492 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 21:22:52,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:22:52,493 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 21:22:52,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:22:52,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:52,494 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-23 21:22:52,494 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:52,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:52,494 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-23 21:22:52,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:52,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:52,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:52,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:52,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:52,661 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 [2018-09-23 21:22:52,670 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:52,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-23 21:22:52,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:52,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:52,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:52,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:22:52,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:22:52,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:22:52,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:22:52,725 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-23 21:22:52,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:52,758 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 21:22:52,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:22:52,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-23 21:22:52,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:52,760 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:22:52,761 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:22:52,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:22:52,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:22:52,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 21:22:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 21:22:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 21:22:52,765 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-23 21:22:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:52,766 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 21:22:52,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:22:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 21:22:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:22:52,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:52,767 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-23 21:22:52,767 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:52,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:52,768 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-23 21:22:52,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:52,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:52,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:52,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:52,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:52,974 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 [2018-09-23 21:22:52,989 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:53,014 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:22:53,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:53,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:53,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:53,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:22:53,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:22:53,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:22:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:22:53,053 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-23 21:22:53,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:53,084 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 21:22:53,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:22:53,087 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-23 21:22:53,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:53,088 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:22:53,088 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:22:53,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:22:53,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:22:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 21:22:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:22:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 21:22:53,094 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-23 21:22:53,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:53,094 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 21:22:53,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:22:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 21:22:53,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:22:53,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:53,095 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-23 21:22:53,095 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:53,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:53,096 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-23 21:22:53,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:53,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:53,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:53,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:53,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:53,313 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 [2018-09-23 21:22:53,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:53,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:53,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:53,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:22:53,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:22:53,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:22:53,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:22:53,381 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-23 21:22:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:53,423 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 21:22:53,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:22:53,424 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-23 21:22:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:53,425 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:22:53,425 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:22:53,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:22:53,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:22:53,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:22:53,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:22:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 21:22:53,430 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-23 21:22:53,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:53,430 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 21:22:53,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:22:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 21:22:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:22:53,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:53,431 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-23 21:22:53,432 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:53,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:53,432 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-23 21:22:53,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:53,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:53,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:53,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:53,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:53,965 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 [2018-09-23 21:22:53,982 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:53,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:53,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:54,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:54,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:54,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:22:54,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:22:54,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:22:54,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:22:54,036 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-23 21:22:54,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:54,103 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 21:22:54,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:22:54,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-23 21:22:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:54,104 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:22:54,104 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:22:54,105 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:22:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:22:54,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:22:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:22:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 21:22:54,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-23 21:22:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:54,109 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 21:22:54,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:22:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 21:22:54,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:22:54,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:54,111 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-23 21:22:54,111 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:54,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:54,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-23 21:22:54,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:54,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:54,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:54,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:54,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:54,267 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 [2018-09-23 21:22:54,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:54,309 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-23 21:22:54,309 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:54,311 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:54,346 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:54,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:22:54,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:22:54,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:22:54,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:22:54,348 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-23 21:22:54,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:54,393 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 21:22:54,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:22:54,394 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-23 21:22:54,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:54,395 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:22:54,395 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:22:54,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:22:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:22:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:22:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:22:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 21:22:54,401 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-23 21:22:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:54,401 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 21:22:54,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:22:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 21:22:54,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:22:54,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:54,402 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-23 21:22:54,403 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:54,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:54,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-23 21:22:54,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:54,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:54,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:54,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:54,650 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:54,650 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 [2018-09-23 21:22:54,658 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:54,674 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:54,675 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:54,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:54,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:54,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:22:54,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:22:54,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:22:54,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:22:54,718 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-23 21:22:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:54,787 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 21:22:54,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:22:54,787 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-23 21:22:54,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:54,788 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:22:54,788 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:22:54,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:22:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:22:54,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:22:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:22:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 21:22:54,793 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-23 21:22:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:54,794 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 21:22:54,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:22:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 21:22:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:22:54,795 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:54,795 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-23 21:22:54,795 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:54,795 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:54,795 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-23 21:22:54,796 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:54,796 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:54,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,797 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:54,797 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:55,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:55,051 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 [2018-09-23 21:22:55,058 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:55,081 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-23 21:22:55,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:55,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:55,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:55,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:22:55,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:22:55,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:22:55,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:22:55,119 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-23 21:22:55,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:55,361 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 21:22:55,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:22:55,362 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-23 21:22:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:55,363 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:22:55,363 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:22:55,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:22:55,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:22:55,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:22:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:22:55,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 21:22:55,372 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-23 21:22:55,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:55,375 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 21:22:55,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:22:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 21:22:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:22:55,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:55,376 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-23 21:22:55,376 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:55,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:55,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-23 21:22:55,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:55,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:55,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:55,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:55,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:55,642 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:55,650 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:55,674 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:22:55,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:55,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:55,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:55,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:22:55,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:22:55,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:22:55,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:22:55,715 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-23 21:22:55,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:55,774 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 21:22:55,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:22:55,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-23 21:22:55,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:55,775 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:22:55,775 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:22:55,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:22:55,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:22:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:22:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:22:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 21:22:55,781 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-23 21:22:55,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:55,781 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 21:22:55,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:22:55,782 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 21:22:55,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:22:55,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:55,783 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-23 21:22:55,783 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:55,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:55,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-23 21:22:55,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:55,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:55,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:55,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:56,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:56,057 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 [2018-09-23 21:22:56,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:56,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:56,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:56,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:22:56,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:22:56,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:22:56,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:22:56,130 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-23 21:22:56,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:56,172 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 21:22:56,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:22:56,173 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-23 21:22:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:56,174 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:22:56,174 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:22:56,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:22:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:22:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:22:56,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:22:56,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 21:22:56,180 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-23 21:22:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:56,180 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 21:22:56,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:22:56,180 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 21:22:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:22:56,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:56,181 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-23 21:22:56,182 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:56,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-23 21:22:56,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:56,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:56,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,183 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:56,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:56,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:56,623 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 [2018-09-23 21:22:56,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:56,686 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:56,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:56,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:56,702 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:56,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:56,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:22:56,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:22:56,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:22:56,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:22:56,726 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-23 21:22:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:56,759 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 21:22:56,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:22:56,759 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-23 21:22:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:56,760 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:22:56,761 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:22:56,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:22:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:22:56,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:22:56,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:22:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 21:22:56,766 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-23 21:22:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:56,766 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 21:22:56,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:22:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 21:22:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:22:56,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:56,768 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-23 21:22:56,768 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:56,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:56,768 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-23 21:22:56,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:56,769 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:56,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:56,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:57,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:57,071 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 [2018-09-23 21:22:57,080 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:57,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-23 21:22:57,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:57,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:57,171 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:57,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:57,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:22:57,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:22:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:22:57,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:22:57,200 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-23 21:22:57,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:57,294 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 21:22:57,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:22:57,295 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-23 21:22:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:57,296 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:22:57,296 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:22:57,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:22:57,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:22:57,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:22:57,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:22:57,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 21:22:57,301 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-23 21:22:57,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:57,301 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 21:22:57,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:22:57,301 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 21:22:57,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:22:57,302 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:57,302 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-23 21:22:57,302 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:57,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:57,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-23 21:22:57,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:57,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:57,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:57,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:57,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:57,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:57,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:57,672 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:57,686 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:57,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:57,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:57,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:57,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:22:57,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:22:57,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:22:57,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:22:57,729 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-23 21:22:57,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:57,807 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 21:22:57,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:22:57,807 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-23 21:22:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:57,808 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:22:57,809 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:22:57,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:22:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:22:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:22:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:22:57,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 21:22:57,815 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-23 21:22:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:57,816 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 21:22:57,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:22:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 21:22:57,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:22:57,817 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:57,817 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-23 21:22:57,817 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:57,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:57,818 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-23 21:22:57,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:57,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:57,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:57,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:57,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:58,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:58,206 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:58,214 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:58,270 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-23 21:22:58,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:58,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:58,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:58,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:22:58,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:22:58,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:22:58,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:22:58,309 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-23 21:22:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:58,423 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 21:22:58,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:22:58,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-23 21:22:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:58,425 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:22:58,425 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:22:58,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:22:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:22:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:22:58,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:22:58,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 21:22:58,429 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-23 21:22:58,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:58,430 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 21:22:58,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:22:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 21:22:58,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:22:58,430 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:58,431 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-23 21:22:58,431 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:58,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:58,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-23 21:22:58,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:58,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:58,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,432 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:58,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:58,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:58,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:58,740 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:58,776 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:22:58,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:58,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:58,819 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:58,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:22:58,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:22:58,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:22:58,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:22:58,820 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-23 21:22:58,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:58,894 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 21:22:58,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:22:58,895 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-23 21:22:58,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:58,896 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:22:58,896 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:22:58,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:22:58,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:22:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:22:58,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:22:58,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 21:22:58,901 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-23 21:22:58,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:58,902 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 21:22:58,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:22:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 21:22:58,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:22:58,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:58,903 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-23 21:22:58,904 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:58,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:58,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-23 21:22:58,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:58,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:58,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:58,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:59,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:59,164 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 [2018-09-23 21:22:59,172 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:59,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:59,230 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:59,230 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:22:59,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:22:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:22:59,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:22:59,232 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-23 21:22:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:59,405 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 21:22:59,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:22:59,405 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-23 21:22:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:59,406 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:22:59,406 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:22:59,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:22:59,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:22:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:22:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:22:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 21:22:59,419 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-23 21:22:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:59,419 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 21:22:59,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:22:59,422 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 21:22:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:22:59,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:59,423 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-23 21:22:59,423 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:59,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:59,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-23 21:22:59,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:59,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:59,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:59,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:59,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:59,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:59,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:59,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:59,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:59,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:59,863 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:59,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:59,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:22:59,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:22:59,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:22:59,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:22:59,885 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-23 21:22:59,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:59,956 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 21:22:59,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:22:59,956 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-23 21:22:59,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:59,957 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:22:59,957 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:22:59,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:22:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:22:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:22:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:22:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 21:22:59,962 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-23 21:22:59,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:59,962 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 21:22:59,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:22:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 21:22:59,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:22:59,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:59,963 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-23 21:22:59,964 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:59,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:59,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-23 21:22:59,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:59,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:59,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:59,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:00,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:00,313 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 [2018-09-23 21:23:00,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:00,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-23 21:23:00,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:00,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:00,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:00,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:23:00,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:23:00,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:23:00,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:23:00,422 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-23 21:23:00,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:00,681 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 21:23:00,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:23:00,682 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-23 21:23:00,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:00,683 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:23:00,683 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:23:00,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:23:00,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:23:00,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:23:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:23:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 21:23:00,687 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-23 21:23:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:00,688 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 21:23:00,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:23:00,688 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 21:23:00,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:23:00,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:00,689 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-23 21:23:00,689 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:00,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:00,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-23 21:23:00,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:00,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:00,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:00,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:01,163 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:01,164 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:01,164 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 [2018-09-23 21:23:01,179 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:01,223 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:01,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:01,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:01,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:01,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:23:01,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:23:01,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:23:01,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:23:01,268 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-23 21:23:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:01,343 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 21:23:01,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:23:01,344 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-23 21:23:01,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:01,345 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:23:01,345 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:23:01,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:23:01,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:23:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:23:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:23:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 21:23:01,349 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-23 21:23:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:01,350 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 21:23:01,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:23:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 21:23:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:23:01,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:01,351 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-23 21:23:01,351 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:01,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:01,352 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-23 21:23:01,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:01,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:01,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:01,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:01,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:01,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:01,828 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 [2018-09-23 21:23:01,844 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:01,956 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-23 21:23:01,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:01,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:01,971 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:01,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:01,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:23:01,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:23:02,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:23:02,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:23:02,000 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-23 21:23:02,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:02,134 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 21:23:02,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:23:02,134 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-23 21:23:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:02,135 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:23:02,135 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:23:02,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:23:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:23:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:23:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:23:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 21:23:02,140 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-23 21:23:02,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:02,140 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 21:23:02,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:23:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 21:23:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:23:02,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:02,141 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-23 21:23:02,141 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:02,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-23 21:23:02,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:02,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:02,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:02,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:02,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:03,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:03,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:03,084 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:03,145 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:23:03,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:03,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:03,191 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:03,191 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:23:03,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:23:03,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:23:03,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:23:03,192 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-23 21:23:03,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:03,264 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 21:23:03,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:23:03,264 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-23 21:23:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:03,265 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:23:03,265 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:23:03,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:23:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:23:03,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:23:03,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:23:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 21:23:03,270 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-23 21:23:03,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:03,270 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 21:23:03,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:23:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 21:23:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:23:03,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:03,271 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-23 21:23:03,271 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:03,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:03,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-23 21:23:03,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:03,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:03,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:03,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:04,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:04,431 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 [2018-09-23 21:23:04,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:04,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:04,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:04,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:04,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:23:04,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:23:04,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:23:04,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:23:04,502 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-23 21:23:04,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:04,572 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 21:23:04,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:23:04,572 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-23 21:23:04,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:04,573 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:23:04,573 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 21:23:04,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:23:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 21:23:04,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 21:23:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:23:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 21:23:04,577 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-23 21:23:04,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:04,577 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 21:23:04,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:23:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 21:23:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:23:04,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:04,578 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-23 21:23:04,578 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:04,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:04,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-23 21:23:04,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:04,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:04,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:04,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:04,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:05,434 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:05,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:05,444 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:05,464 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:05,464 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:05,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:05,506 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:05,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:23:05,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:23:05,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:23:05,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:23:05,507 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-23 21:23:05,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:05,579 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 21:23:05,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:23:05,580 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-23 21:23:05,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:05,581 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:23:05,581 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:23:05,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:23:05,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:23:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:23:05,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:23:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 21:23:05,585 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-23 21:23:05,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:05,585 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 21:23:05,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:23:05,585 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 21:23:05,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:23:05,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:05,586 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-23 21:23:05,586 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:05,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:05,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-23 21:23:05,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:05,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:05,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:05,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:05,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:06,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:06,262 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 [2018-09-23 21:23:06,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:06,346 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-23 21:23:06,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:06,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:06,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:06,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:23:06,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:23:06,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:23:06,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:23:06,391 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-23 21:23:06,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:06,435 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 21:23:06,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:23:06,435 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-23 21:23:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:06,436 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:23:06,436 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:23:06,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:23:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:23:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:23:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:23:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 21:23:06,440 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-23 21:23:06,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:06,440 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 21:23:06,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:23:06,441 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 21:23:06,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:23:06,441 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:06,441 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-23 21:23:06,441 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:06,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:06,442 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-23 21:23:06,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:06,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:06,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:06,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:06,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:07,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:07,659 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 [2018-09-23 21:23:07,667 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:07,692 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:07,692 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:07,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:07,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:07,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:23:07,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:23:07,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:23:07,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:23:07,729 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-23 21:23:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:07,805 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 21:23:07,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:23:07,806 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-23 21:23:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:07,808 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:23:07,808 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:23:07,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:23:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:23:07,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 21:23:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 21:23:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 21:23:07,813 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-23 21:23:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:07,813 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 21:23:07,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:23:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 21:23:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:23:07,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:07,814 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-23 21:23:07,814 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:07,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:07,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-23 21:23:07,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:07,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:07,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:07,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:07,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:08,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:08,535 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:08,544 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:08,708 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-23 21:23:08,708 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:08,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:08,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:08,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:23:08,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:23:08,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:23:08,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:23:08,743 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-23 21:23:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:08,812 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 21:23:08,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:23:08,812 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-23 21:23:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:08,813 INFO L225 Difference]: With dead ends: 67 [2018-09-23 21:23:08,813 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:23:08,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:23:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:23:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 21:23:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:23:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 21:23:08,818 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-23 21:23:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:08,818 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 21:23:08,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:23:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 21:23:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 21:23:08,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:08,819 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-23 21:23:08,819 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:08,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-23 21:23:08,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:08,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:08,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:08,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:08,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:09,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:09,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:09,435 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:09,520 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 21:23:09,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:09,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:09,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:09,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:23:09,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:23:09,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:23:09,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:23:09,559 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-23 21:23:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:09,773 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 21:23:09,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:23:09,773 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-23 21:23:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:09,774 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:23:09,774 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 21:23:09,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:23:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 21:23:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 21:23:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 21:23:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 21:23:09,780 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-23 21:23:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:09,781 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 21:23:09,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:23:09,781 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 21:23:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 21:23:09,781 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:09,781 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-23 21:23:09,781 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:09,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:09,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-23 21:23:09,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:09,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:09,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:09,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:09,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:10,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:10,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:10,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:10,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:10,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:10,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:23:10,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:23:10,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:23:10,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:23:10,555 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-23 21:23:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:10,612 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 21:23:10,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:23:10,613 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-23 21:23:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:10,614 INFO L225 Difference]: With dead ends: 71 [2018-09-23 21:23:10,614 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 21:23:10,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:23:10,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 21:23:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 21:23:10,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 21:23:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 21:23:10,618 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-23 21:23:10,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:10,618 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 21:23:10,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:23:10,619 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 21:23:10,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:23:10,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:10,619 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-23 21:23:10,619 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:10,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:10,620 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-23 21:23:10,620 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:10,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:10,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:10,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:10,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:11,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:11,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:11,131 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:11,157 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:11,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:11,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:11,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:11,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:23:11,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:23:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:23:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:23:11,202 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-23 21:23:11,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:11,268 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 21:23:11,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:23:11,269 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-23 21:23:11,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:11,270 INFO L225 Difference]: With dead ends: 73 [2018-09-23 21:23:11,270 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:23:11,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:23:11,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:23:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 21:23:11,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 21:23:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 21:23:11,275 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-23 21:23:11,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:11,276 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 21:23:11,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:23:11,276 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 21:23:11,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 21:23:11,276 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:11,277 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-23 21:23:11,277 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:11,277 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:11,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-23 21:23:11,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:11,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:11,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:11,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:11,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:11,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:11,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:11,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:11,924 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-23 21:23:11,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:11,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:11,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:11,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:23:11,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:23:11,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:23:11,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:23:11,961 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-23 21:23:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:12,039 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 21:23:12,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:23:12,039 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-23 21:23:12,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:12,040 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:23:12,040 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 21:23:12,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:23:12,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 21:23:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 21:23:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 21:23:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 21:23:12,044 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-23 21:23:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:12,044 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 21:23:12,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:23:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 21:23:12,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 21:23:12,045 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:12,045 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-23 21:23:12,045 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:12,045 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:12,046 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-23 21:23:12,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:12,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:12,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:12,046 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:12,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:12,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:13,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:13,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:13,147 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:13,183 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:13,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:13,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:13,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:13,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:23:13,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:23:13,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:23:13,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:23:13,234 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-23 21:23:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:13,427 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 21:23:13,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:23:13,427 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-23 21:23:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:13,428 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:23:13,428 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 21:23:13,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:23:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 21:23:13,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 21:23:13,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 21:23:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 21:23:13,433 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-23 21:23:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:13,433 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 21:23:13,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:23:13,433 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 21:23:13,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:23:13,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:13,434 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-23 21:23:13,434 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:13,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:13,435 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-23 21:23:13,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:13,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:13,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:13,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:13,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:14,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:14,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:14,082 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:14,371 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 21:23:14,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:14,376 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:14,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:14,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:23:14,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:23:14,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:23:14,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:23:14,415 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-23 21:23:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:14,480 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 21:23:14,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:23:14,480 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-23 21:23:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:14,481 INFO L225 Difference]: With dead ends: 79 [2018-09-23 21:23:14,481 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:23:14,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:23:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:23:14,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 21:23:14,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:23:14,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 21:23:14,485 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-23 21:23:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:14,485 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 21:23:14,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:23:14,486 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 21:23:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:23:14,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:14,486 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-23 21:23:14,486 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:14,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:14,486 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-23 21:23:14,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:14,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:14,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:14,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:14,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:15,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:15,232 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 [2018-09-23 21:23:15,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:15,374 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 21:23:15,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:15,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:15,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:15,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:23:15,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:23:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:23:15,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:23:15,428 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-23 21:23:15,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:15,958 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 21:23:15,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:23:15,959 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-23 21:23:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:15,960 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:23:15,960 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:23:15,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:23:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:23:15,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 21:23:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:23:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 21:23:15,964 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-23 21:23:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:15,964 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 21:23:15,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:23:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 21:23:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:23:15,965 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:15,965 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-23 21:23:15,965 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:15,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:15,965 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-23 21:23:15,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:15,966 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:15,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:15,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:15,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:16,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:16,591 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:16,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:16,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:16,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:16,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:23:16,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:23:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:23:16,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:23:16,664 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-23 21:23:16,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:16,744 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 21:23:16,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:23:16,744 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-23 21:23:16,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:16,745 INFO L225 Difference]: With dead ends: 83 [2018-09-23 21:23:16,746 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 21:23:16,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:23:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 21:23:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 21:23:16,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 21:23:16,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 21:23:16,750 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-23 21:23:16,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:16,750 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 21:23:16,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:23:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 21:23:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:23:16,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:16,751 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-23 21:23:16,751 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:16,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-23 21:23:16,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:16,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:16,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:16,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:16,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:17,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:17,683 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 [2018-09-23 21:23:17,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:17,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:17,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:17,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:17,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:17,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:23:17,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:23:17,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:23:17,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:23:17,765 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-23 21:23:17,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:17,849 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 21:23:17,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:23:17,850 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-23 21:23:17,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:17,851 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:23:17,851 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:23:17,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:23:17,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:23:17,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 21:23:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 21:23:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 21:23:17,855 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-23 21:23:17,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:17,855 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 21:23:17,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:23:17,855 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 21:23:17,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:23:17,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:17,856 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-23 21:23:17,856 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:17,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:17,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-23 21:23:17,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:17,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:17,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:17,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:17,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:18,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:18,665 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 [2018-09-23 21:23:18,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:18,844 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-23 21:23:18,845 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:18,847 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:18,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:18,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:18,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:23:18,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:23:18,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:23:18,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:23:18,884 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-23 21:23:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:19,022 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 21:23:19,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:23:19,023 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-23 21:23:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:19,023 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:23:19,023 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 21:23:19,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:23:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 21:23:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 21:23:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 21:23:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 21:23:19,027 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-23 21:23:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:19,027 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 21:23:19,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:23:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 21:23:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 21:23:19,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:19,028 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-23 21:23:19,028 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:19,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:19,028 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-23 21:23:19,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:19,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:19,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:19,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:19,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:20,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:20,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:20,259 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:20,287 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:20,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:20,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:20,325 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:20,326 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:23:20,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:23:20,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:23:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:23:20,327 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-23 21:23:20,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:20,400 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 21:23:20,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:23:20,400 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-23 21:23:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:20,401 INFO L225 Difference]: With dead ends: 89 [2018-09-23 21:23:20,401 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 21:23:20,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:23:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 21:23:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 21:23:20,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 21:23:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 21:23:20,405 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-23 21:23:20,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:20,406 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 21:23:20,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:23:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 21:23:20,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 21:23:20,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:20,407 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-23 21:23:20,407 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:20,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:20,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-23 21:23:20,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:20,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:20,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:20,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:20,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:21,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:21,241 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 [2018-09-23 21:23:21,248 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:21,753 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-23 21:23:21,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:21,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:21,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:21,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:23:21,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:23:21,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:23:21,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:23:21,799 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-23 21:23:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:21,880 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 21:23:21,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:23:21,880 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-23 21:23:21,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:21,881 INFO L225 Difference]: With dead ends: 91 [2018-09-23 21:23:21,881 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 21:23:21,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:23:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 21:23:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 21:23:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 21:23:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 21:23:21,886 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-23 21:23:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:21,886 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 21:23:21,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:23:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 21:23:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:23:21,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:21,887 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-23 21:23:21,887 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:21,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:21,888 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-23 21:23:21,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:21,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:21,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:21,888 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:21,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:23,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:23,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:23,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:23,217 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 21:23:23,217 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:23,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:23,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:23,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:23:23,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:23:23,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:23:23,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:23:23,261 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-23 21:23:23,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:23,323 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 21:23:23,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:23:23,323 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-23 21:23:23,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:23,324 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:23:23,325 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 21:23:23,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:23:23,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 21:23:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 21:23:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 21:23:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 21:23:23,329 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-23 21:23:23,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:23,329 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 21:23:23,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:23:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 21:23:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 21:23:23,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:23,330 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-23 21:23:23,330 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:23,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-23 21:23:23,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:23,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:23,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:23,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:23,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:24,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:24,306 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 [2018-09-23 21:23:24,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:24,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:24,387 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:24,387 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:23:24,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:23:24,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:23:24,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:23:24,389 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-23 21:23:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:24,483 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 21:23:24,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:23:24,483 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-23 21:23:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:24,484 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:23:24,484 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 21:23:24,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:23:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 21:23:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 21:23:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 21:23:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 21:23:24,487 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-23 21:23:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:24,488 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 21:23:24,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:23:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 21:23:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:23:24,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:24,488 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-23 21:23:24,488 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:24,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:24,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-23 21:23:24,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:24,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:24,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:24,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:24,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:25,333 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:25,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:25,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:25,376 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:25,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:25,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:25,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:25,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:23:25,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:23:25,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:23:25,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:23:25,420 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-23 21:23:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:25,713 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 21:23:25,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:23:25,714 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-23 21:23:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:25,715 INFO L225 Difference]: With dead ends: 97 [2018-09-23 21:23:25,715 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 21:23:25,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:23:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 21:23:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 21:23:25,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 21:23:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 21:23:25,719 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-23 21:23:25,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:25,720 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 21:23:25,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:23:25,720 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 21:23:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 21:23:25,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:25,720 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-23 21:23:25,721 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:25,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:25,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-23 21:23:25,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:25,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:25,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:25,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:25,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:26,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:26,773 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 [2018-09-23 21:23:26,781 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:27,033 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-23 21:23:27,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:27,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:27,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:27,083 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:23:27,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:23:27,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:23:27,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:23:27,084 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-23 21:23:27,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:27,173 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 21:23:27,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:23:27,173 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-23 21:23:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:27,175 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:23:27,175 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 21:23:27,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:23:27,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 21:23:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 21:23:27,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 21:23:27,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 21:23:27,178 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-23 21:23:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:27,179 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 21:23:27,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:23:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 21:23:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 21:23:27,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:27,179 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-23 21:23:27,179 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:27,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-23 21:23:27,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:27,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:27,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:27,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:27,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:28,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:28,441 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 [2018-09-23 21:23:28,449 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:28,484 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:28,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:28,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:28,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:28,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:23:28,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:23:28,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:23:28,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:23:28,531 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-23 21:23:28,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:28,618 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 21:23:28,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:23:28,618 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-23 21:23:28,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:28,619 INFO L225 Difference]: With dead ends: 101 [2018-09-23 21:23:28,619 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:23:28,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:23:28,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:23:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 21:23:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 21:23:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 21:23:28,624 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-23 21:23:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:28,624 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 21:23:28,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:23:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 21:23:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:23:28,625 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:28,625 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-23 21:23:28,626 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:28,626 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:28,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-23 21:23:28,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:28,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:28,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:28,627 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:28,627 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:29,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:29,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:29,673 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:30,500 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-23 21:23:30,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:30,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:30,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:30,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:23:30,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:23:30,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:23:30,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:23:30,543 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-23 21:23:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:30,637 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 21:23:30,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:23:30,637 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-23 21:23:30,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:30,638 INFO L225 Difference]: With dead ends: 103 [2018-09-23 21:23:30,639 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:23:30,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:23:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:23:30,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:23:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:23:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 21:23:30,642 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-23 21:23:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:30,643 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 21:23:30,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:23:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 21:23:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 21:23:30,643 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:30,644 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-23 21:23:30,644 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:30,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:30,644 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-23 21:23:30,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:30,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:30,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:30,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:30,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:32,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:32,379 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 [2018-09-23 21:23:32,387 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:32,672 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 21:23:32,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:32,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:32,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:32,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:23:32,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:23:32,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:23:32,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:23:32,714 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-23 21:23:32,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:32,889 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 21:23:32,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:23:32,890 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-23 21:23:32,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:32,890 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:23:32,891 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 21:23:32,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:23:32,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 21:23:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 21:23:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 21:23:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 21:23:32,895 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-23 21:23:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:32,895 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 21:23:32,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:23:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 21:23:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 21:23:32,896 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:32,896 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-23 21:23:32,896 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:32,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:32,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-23 21:23:32,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:32,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:32,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:32,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:32,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:34,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:34,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:34,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:34,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:34,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:34,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:23:34,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:23:34,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:23:34,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:23:34,434 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-23 21:23:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:34,512 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 21:23:34,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:23:34,513 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-23 21:23:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:34,514 INFO L225 Difference]: With dead ends: 107 [2018-09-23 21:23:34,514 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 21:23:34,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:23:34,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 21:23:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 21:23:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 21:23:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-23 21:23:34,519 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-23 21:23:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:34,519 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-23 21:23:34,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:23:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-23 21:23:34,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 21:23:34,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:34,520 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-23 21:23:34,520 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:34,521 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:34,521 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-23 21:23:34,521 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:34,521 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:34,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:34,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:34,522 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:35,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:35,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:35,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:35,786 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:35,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:35,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:35,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:35,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:35,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:23:35,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:23:35,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:23:35,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:23:35,841 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-23 21:23:36,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:36,065 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 21:23:36,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:23:36,066 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-23 21:23:36,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:36,067 INFO L225 Difference]: With dead ends: 109 [2018-09-23 21:23:36,069 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 21:23:36,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:23:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 21:23:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 21:23:36,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 21:23:36,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 21:23:36,074 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-23 21:23:36,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:36,074 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 21:23:36,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:23:36,075 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 21:23:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 21:23:36,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:36,078 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-23 21:23:36,079 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:36,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:36,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-23 21:23:36,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:36,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:36,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:36,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:36,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:37,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:37,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:37,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:37,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-23 21:23:37,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:37,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:37,620 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:37,621 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:23:37,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:23:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:23:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:23:37,623 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-23 21:23:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:37,794 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 21:23:37,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:23:37,794 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-23 21:23:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:37,795 INFO L225 Difference]: With dead ends: 111 [2018-09-23 21:23:37,795 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 21:23:37,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:23:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 21:23:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 21:23:37,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 21:23:37,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-23 21:23:37,799 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-23 21:23:37,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:37,800 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-23 21:23:37,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:23:37,800 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-23 21:23:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 21:23:37,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:37,801 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-23 21:23:37,801 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:37,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:37,801 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-23 21:23:37,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:37,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:37,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:37,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:37,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:37,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:40,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:40,520 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 [2018-09-23 21:23:40,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:40,596 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:40,597 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:40,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:40,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:40,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:23:40,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:23:40,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:23:40,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:23:40,641 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-23 21:23:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:40,754 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 21:23:40,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:23:40,754 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-23 21:23:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:40,755 INFO L225 Difference]: With dead ends: 113 [2018-09-23 21:23:40,755 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 21:23:40,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:23:40,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 21:23:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 21:23:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 21:23:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-23 21:23:40,760 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-23 21:23:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:40,760 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-23 21:23:40,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:23:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-23 21:23:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 21:23:40,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:40,761 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-23 21:23:40,761 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:40,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:40,761 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-23 21:23:40,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:40,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:40,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:40,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:40,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:41,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:41,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:41,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:43,328 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-23 21:23:43,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:43,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:43,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:43,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:23:43,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:23:43,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:23:43,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:23:43,389 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-23 21:23:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:43,843 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 21:23:43,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:23:43,844 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-23 21:23:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:43,845 INFO L225 Difference]: With dead ends: 115 [2018-09-23 21:23:43,845 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 21:23:43,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:23:43,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 21:23:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 21:23:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 21:23:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-23 21:23:43,849 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-23 21:23:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:43,849 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-23 21:23:43,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:23:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-23 21:23:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 21:23:43,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:43,850 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-23 21:23:43,850 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:43,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:43,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-23 21:23:43,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:43,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:43,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:43,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:43,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:45,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:45,959 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 [2018-09-23 21:23:45,966 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:46,342 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 21:23:46,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:46,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:46,407 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:46,407 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 21:23:46,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:23:46,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:23:46,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:23:46,409 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-23 21:23:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:46,690 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-23 21:23:46,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:23:46,691 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-23 21:23:46,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:46,692 INFO L225 Difference]: With dead ends: 117 [2018-09-23 21:23:46,693 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 21:23:46,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:23:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 21:23:46,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 21:23:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 21:23:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-23 21:23:46,697 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-23 21:23:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:46,697 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-23 21:23:46,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:23:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-23 21:23:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 21:23:46,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:46,698 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-23 21:23:46,698 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:46,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:46,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-23 21:23:46,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:46,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:46,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:46,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:46,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:48,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:48,012 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 [2018-09-23 21:23:48,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:48,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:48,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:48,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:23:48,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:23:48,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:23:48,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:23:48,115 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-23 21:23:48,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:48,760 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-23 21:23:48,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:23:48,761 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-23 21:23:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:48,762 INFO L225 Difference]: With dead ends: 119 [2018-09-23 21:23:48,762 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 21:23:48,763 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:23:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 21:23:48,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 21:23:48,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 21:23:48,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-23 21:23:48,766 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-23 21:23:48,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:48,766 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-23 21:23:48,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:23:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-23 21:23:48,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 21:23:48,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:48,767 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-23 21:23:48,767 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:48,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:48,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-23 21:23:48,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:48,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:48,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:48,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:48,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:50,191 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:50,191 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 [2018-09-23 21:23:50,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:50,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:50,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:50,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:50,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:50,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:23:50,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:23:50,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:23:50,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:23:50,306 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-23 21:23:51,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:51,097 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-23 21:23:51,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:23:51,098 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-23 21:23:51,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:51,099 INFO L225 Difference]: With dead ends: 121 [2018-09-23 21:23:51,099 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 21:23:51,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:23:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 21:23:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 21:23:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 21:23:51,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-23 21:23:51,103 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-23 21:23:51,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:51,103 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-23 21:23:51,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:23:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-23 21:23:51,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 21:23:51,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:51,105 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-23 21:23:51,105 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:51,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:51,105 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-23 21:23:51,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:51,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:51,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:51,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:51,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:53,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:53,067 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 [2018-09-23 21:23:53,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:53,591 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-23 21:23:53,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:53,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:53,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:53,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 21:23:53,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:23:53,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:23:53,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:23:53,656 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-23 21:23:53,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:53,810 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-23 21:23:53,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:23:53,810 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-23 21:23:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:53,811 INFO L225 Difference]: With dead ends: 123 [2018-09-23 21:23:53,811 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 21:23:53,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:23:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 21:23:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 21:23:53,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 21:23:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-23 21:23:53,815 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-23 21:23:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:53,815 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-23 21:23:53,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:23:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-23 21:23:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-23 21:23:53,816 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:53,816 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-23 21:23:53,817 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:53,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:53,817 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-23 21:23:53,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:53,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:53,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:53,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:53,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:55,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:55,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:55,179 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:55,223 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:55,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:55,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:55,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:55,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 21:23:55,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 21:23:55,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 21:23:55,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:23:55,283 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-23 21:23:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:55,484 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-23 21:23:55,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:23:55,485 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-23 21:23:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:55,486 INFO L225 Difference]: With dead ends: 125 [2018-09-23 21:23:55,486 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 21:23:55,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:23:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 21:23:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-23 21:23:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 21:23:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-23 21:23:55,490 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-23 21:23:55,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:55,491 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-23 21:23:55,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 21:23:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-23 21:23:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 21:23:55,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:55,492 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-23 21:23:55,492 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:55,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:55,492 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-23 21:23:55,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:55,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:55,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:55,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:55,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:56,911 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:56,911 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 [2018-09-23 21:23:56,918 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:58,927 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-23 21:23:58,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:58,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:58,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:58,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:58,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:23:58,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:23:58,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:23:58,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:23:58,984 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-23 21:23:59,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:59,119 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-23 21:23:59,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:23:59,119 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-23 21:23:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:59,120 INFO L225 Difference]: With dead ends: 127 [2018-09-23 21:23:59,120 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 21:23:59,121 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:23:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 21:23:59,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-23 21:23:59,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 21:23:59,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-23 21:23:59,124 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-23 21:23:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:59,124 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-23 21:23:59,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:23:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-23 21:23:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 21:23:59,125 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:59,125 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-23 21:23:59,125 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:59,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:59,126 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-23 21:23:59,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:59,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:59,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:59,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:59,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:00,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:00,563 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 [2018-09-23 21:24:00,571 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:01,083 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-23 21:24:01,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:01,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:01,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:01,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 21:24:01,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 21:24:01,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 21:24:01,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:24:01,148 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-23 21:24:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:01,302 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-23 21:24:01,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:24:01,302 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-23 21:24:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:01,303 INFO L225 Difference]: With dead ends: 129 [2018-09-23 21:24:01,303 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 21:24:01,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:24:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 21:24:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-23 21:24:01,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 21:24:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-23 21:24:01,307 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-23 21:24:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:01,307 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-23 21:24:01,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 21:24:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-23 21:24:01,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 21:24:01,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:01,308 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-23 21:24:01,308 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:01,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:01,308 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-23 21:24:01,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:01,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:01,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:01,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:01,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:02,849 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:02,849 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:02,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:02,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:02,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:02,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:24:02,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:24:02,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:24:02,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:24:02,952 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-23 21:24:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:03,090 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-23 21:24:03,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:24:03,091 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-23 21:24:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:03,092 INFO L225 Difference]: With dead ends: 131 [2018-09-23 21:24:03,092 INFO L226 Difference]: Without dead ends: 129 [2018-09-23 21:24:03,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:24:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-23 21:24:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-23 21:24:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 21:24:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-23 21:24:03,095 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-23 21:24:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:03,095 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-23 21:24:03,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:24:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-23 21:24:03,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 21:24:03,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:03,096 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-23 21:24:03,096 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:03,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:03,096 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-23 21:24:03,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:03,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:03,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:03,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:03,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:04,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:04,969 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 [2018-09-23 21:24:04,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:05,023 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:05,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:05,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:05,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:05,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:05,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 21:24:05,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:24:05,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:24:05,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:24:05,068 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-23 21:24:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:05,172 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-23 21:24:05,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:24:05,173 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-23 21:24:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:05,174 INFO L225 Difference]: With dead ends: 133 [2018-09-23 21:24:05,174 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 21:24:05,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:24:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 21:24:05,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 21:24:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 21:24:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-23 21:24:05,178 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-23 21:24:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:05,178 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-23 21:24:05,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:24:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-23 21:24:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 21:24:05,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:05,179 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-23 21:24:05,180 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:05,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-23 21:24:05,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:05,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:05,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:05,181 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:05,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:06,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:06,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:06,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:07,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-23 21:24:07,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:07,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:07,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:07,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 21:24:07,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:24:07,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:24:07,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:24:07,642 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-23 21:24:07,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:07,787 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-23 21:24:07,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:24:07,788 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-23 21:24:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:07,788 INFO L225 Difference]: With dead ends: 135 [2018-09-23 21:24:07,789 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 21:24:07,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:24:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 21:24:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 21:24:07,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 21:24:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-23 21:24:07,792 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-23 21:24:07,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:07,793 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-23 21:24:07,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:24:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-23 21:24:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-23 21:24:07,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:07,794 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-23 21:24:07,794 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:07,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-23 21:24:07,794 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:07,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:07,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:07,796 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:07,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:07,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:09,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:09,691 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 [2018-09-23 21:24:09,700 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:09,767 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:09,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:09,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:09,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:09,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 21:24:09,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 21:24:09,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 21:24:09,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:24:09,842 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-23 21:24:10,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:10,247 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-23 21:24:10,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:24:10,247 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-23 21:24:10,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:10,248 INFO L225 Difference]: With dead ends: 137 [2018-09-23 21:24:10,248 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 21:24:10,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:24:10,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 21:24:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-23 21:24:10,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 21:24:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-23 21:24:10,252 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-23 21:24:10,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:10,252 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-23 21:24:10,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 21:24:10,252 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-23 21:24:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 21:24:10,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:10,253 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-23 21:24:10,253 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:10,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:10,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-23 21:24:10,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:10,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:10,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:10,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:10,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:11,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:11,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:11,986 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:14,805 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-23 21:24:14,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:14,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:14,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:14,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:24:14,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:24:14,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:24:14,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:24:14,888 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-23 21:24:15,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:15,712 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-23 21:24:15,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:24:15,712 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-23 21:24:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:15,713 INFO L225 Difference]: With dead ends: 139 [2018-09-23 21:24:15,714 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 21:24:15,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:24:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 21:24:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 21:24:15,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 21:24:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-23 21:24:15,718 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-23 21:24:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:15,718 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-23 21:24:15,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:24:15,719 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-23 21:24:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-23 21:24:15,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:15,720 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-23 21:24:15,720 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:15,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:15,720 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-23 21:24:15,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:15,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:15,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:15,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:15,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:17,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:17,444 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 [2018-09-23 21:24:17,452 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:18,168 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-23 21:24:18,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:18,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:18,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:18,237 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 21:24:18,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 21:24:18,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 21:24:18,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:24:18,239 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-23 21:24:18,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:18,379 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-23 21:24:18,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:24:18,379 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-23 21:24:18,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:18,380 INFO L225 Difference]: With dead ends: 141 [2018-09-23 21:24:18,380 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 21:24:18,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:24:18,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 21:24:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 21:24:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 21:24:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-23 21:24:18,383 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-23 21:24:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:18,383 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-23 21:24:18,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 21:24:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-23 21:24:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 21:24:18,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:18,384 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-23 21:24:18,384 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:18,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:18,384 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-23 21:24:18,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:18,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:18,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:18,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:18,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:20,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:20,561 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 [2018-09-23 21:24:20,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:20,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:20,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:20,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:24:20,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:24:20,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:24:20,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:24:20,667 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-23 21:24:20,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:20,776 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-23 21:24:20,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:24:20,777 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-23 21:24:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:20,778 INFO L225 Difference]: With dead ends: 143 [2018-09-23 21:24:20,778 INFO L226 Difference]: Without dead ends: 141 [2018-09-23 21:24:20,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:24:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-23 21:24:20,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-23 21:24:20,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-23 21:24:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-23 21:24:20,782 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-23 21:24:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:20,782 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-23 21:24:20,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:24:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-23 21:24:20,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 21:24:20,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:20,783 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-23 21:24:20,783 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:20,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:20,783 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-23 21:24:20,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:20,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:20,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:20,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:20,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:22,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:22,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:22,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:22,589 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:22,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:22,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:22,633 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:22,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 21:24:22,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:24:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:24:22,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:24:22,635 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-23 21:24:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:22,753 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-23 21:24:22,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:24:22,753 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-23 21:24:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:22,754 INFO L225 Difference]: With dead ends: 145 [2018-09-23 21:24:22,754 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 21:24:22,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:24:22,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 21:24:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-23 21:24:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 21:24:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-23 21:24:22,759 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-23 21:24:22,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:22,759 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-23 21:24:22,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:24:22,759 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-23 21:24:22,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 21:24:22,760 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:22,760 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-23 21:24:22,760 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:22,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:22,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-23 21:24:22,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:22,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:22,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:22,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:22,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:24,759 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:24,759 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:24,766 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:25,841 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-23 21:24:25,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:25,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:25,910 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:25,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 21:24:25,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:24:25,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:24:25,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:24:25,912 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-23 21:24:26,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:26,257 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-23 21:24:26,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:24:26,257 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-23 21:24:26,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:26,258 INFO L225 Difference]: With dead ends: 147 [2018-09-23 21:24:26,258 INFO L226 Difference]: Without dead ends: 145 [2018-09-23 21:24:26,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:24:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-23 21:24:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-23 21:24:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 21:24:26,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-23 21:24:26,261 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-23 21:24:26,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:26,262 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-23 21:24:26,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:24:26,262 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-23 21:24:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-23 21:24:26,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:26,262 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-23 21:24:26,263 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:26,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:26,263 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-23 21:24:26,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:26,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:26,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:26,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:28,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:28,126 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 [2018-09-23 21:24:28,133 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:28,185 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:28,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:28,188 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:28,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:28,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 21:24:28,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 21:24:28,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 21:24:28,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:24:28,255 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-23 21:24:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:28,526 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-23 21:24:28,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:24:28,526 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-23 21:24:28,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:28,527 INFO L225 Difference]: With dead ends: 149 [2018-09-23 21:24:28,527 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 21:24:28,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:24:28,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 21:24:28,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-23 21:24:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 21:24:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-23 21:24:28,532 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-23 21:24:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:28,532 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-23 21:24:28,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 21:24:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-23 21:24:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 21:24:28,533 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:28,533 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-23 21:24:28,533 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:28,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:28,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-23 21:24:28,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:28,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:28,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:28,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:28,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:30,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:30,785 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:30,785 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 [2018-09-23 21:24:30,792 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:34,778 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-23 21:24:34,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:34,784 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:34,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:34,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 21:24:34,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:24:34,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:24:34,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:24:34,854 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-23 21:24:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:35,013 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-23 21:24:35,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:24:35,013 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-23 21:24:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:35,014 INFO L225 Difference]: With dead ends: 151 [2018-09-23 21:24:35,015 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 21:24:35,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:24:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 21:24:35,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 21:24:35,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 21:24:35,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-23 21:24:35,018 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-23 21:24:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:35,019 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-23 21:24:35,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:24:35,019 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-23 21:24:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 21:24:35,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:35,020 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-23 21:24:35,020 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:35,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:35,020 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-23 21:24:35,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:35,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:35,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:35,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:35,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:36,991 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:36,991 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 [2018-09-23 21:24:36,998 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:37,949 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-23 21:24:37,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:37,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:37,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:38,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:38,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 21:24:38,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 21:24:38,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 21:24:38,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:24:38,011 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-23 21:24:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:38,147 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-23 21:24:38,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:24:38,147 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-23 21:24:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:38,149 INFO L225 Difference]: With dead ends: 153 [2018-09-23 21:24:38,149 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 21:24:38,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:24:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 21:24:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-23 21:24:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 21:24:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-23 21:24:38,153 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-23 21:24:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:38,154 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-23 21:24:38,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 21:24:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-23 21:24:38,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-23 21:24:38,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:38,155 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-23 21:24:38,155 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:38,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-23 21:24:38,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:38,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:38,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:38,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:38,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:40,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:40,515 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 [2018-09-23 21:24:40,522 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:40,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:40,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:40,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:40,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 21:24:40,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:24:40,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:24:40,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:24:40,642 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-23 21:24:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:40,833 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-23 21:24:40,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:24:40,834 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-23 21:24:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:40,835 INFO L225 Difference]: With dead ends: 155 [2018-09-23 21:24:40,835 INFO L226 Difference]: Without dead ends: 153 [2018-09-23 21:24:40,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:24:40,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-23 21:24:40,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-23 21:24:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-23 21:24:40,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-23 21:24:40,839 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-23 21:24:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:40,839 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-23 21:24:40,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:24:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-23 21:24:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 21:24:40,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:40,841 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-23 21:24:40,841 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:40,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:40,841 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-23 21:24:40,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:40,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:40,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:40,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:40,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:42,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:42,982 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 [2018-09-23 21:24:42,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:43,044 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:43,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:43,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:43,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:43,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 21:24:43,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 21:24:43,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 21:24:43,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:24:43,121 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-23 21:24:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:43,407 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-23 21:24:43,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:24:43,407 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-23 21:24:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:43,408 INFO L225 Difference]: With dead ends: 157 [2018-09-23 21:24:43,408 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 21:24:43,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:24:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 21:24:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-23 21:24:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 21:24:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-23 21:24:43,411 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-23 21:24:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:43,411 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-23 21:24:43,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 21:24:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-23 21:24:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 21:24:43,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:43,412 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-23 21:24:43,412 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:43,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-23 21:24:43,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:43,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:43,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:43,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:43,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:45,775 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:45,775 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 [2018-09-23 21:24:45,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:47,204 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-23 21:24:47,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:47,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:47,257 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:47,258 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 21:24:47,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:24:47,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:24:47,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:24:47,259 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-23 21:24:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:47,471 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-23 21:24:47,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 21:24:47,472 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-23 21:24:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:47,473 INFO L225 Difference]: With dead ends: 159 [2018-09-23 21:24:47,473 INFO L226 Difference]: Without dead ends: 157 [2018-09-23 21:24:47,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:24:47,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-23 21:24:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-23 21:24:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-23 21:24:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-23 21:24:47,476 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-23 21:24:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:47,477 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-23 21:24:47,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:24:47,477 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-23 21:24:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-23 21:24:47,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:47,477 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-23 21:24:47,478 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:47,478 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:47,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-23 21:24:47,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:47,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:47,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:47,479 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:47,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:49,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:49,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:49,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:49,917 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:49,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:49,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:49,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:49,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 21:24:49,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 21:24:49,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 21:24:49,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:24:49,988 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-23 21:24:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:50,208 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-23 21:24:50,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 21:24:50,208 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-23 21:24:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:50,209 INFO L225 Difference]: With dead ends: 161 [2018-09-23 21:24:50,209 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 21:24:50,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:24:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 21:24:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-23 21:24:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 21:24:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-23 21:24:50,212 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-23 21:24:50,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:50,212 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-23 21:24:50,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 21:24:50,212 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-23 21:24:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 21:24:50,213 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:50,213 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-23 21:24:50,213 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:50,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-23 21:24:50,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:50,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:50,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:50,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:50,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:52,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:52,500 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 [2018-09-23 21:24:52,513 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:57,897 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-23 21:24:57,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:57,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:57,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:57,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 21:24:57,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:24:57,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:24:57,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:24:57,955 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-23 21:24:58,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:58,477 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-23 21:24:58,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 21:24:58,478 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-23 21:24:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:58,479 INFO L225 Difference]: With dead ends: 163 [2018-09-23 21:24:58,479 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 21:24:58,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:24:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 21:24:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-23 21:24:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-23 21:24:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-23 21:24:58,483 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-23 21:24:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:58,483 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-23 21:24:58,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:24:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-23 21:24:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-23 21:24:58,484 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:58,485 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-23 21:24:58,485 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:58,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:58,485 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-23 21:24:58,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:58,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:58,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:58,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:58,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:01,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:01,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:25:01,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:02,924 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-23 21:25:02,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:02,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:02,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:02,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 21:25:02,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 21:25:02,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 21:25:02,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:25:02,988 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-23 21:25:03,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:03,141 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-23 21:25:03,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 21:25:03,142 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-23 21:25:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:03,143 INFO L225 Difference]: With dead ends: 165 [2018-09-23 21:25:03,143 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 21:25:03,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:25:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 21:25:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-23 21:25:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 21:25:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-23 21:25:03,149 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-23 21:25:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:03,149 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-23 21:25:03,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 21:25:03,149 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-23 21:25:03,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 21:25:03,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:03,150 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-23 21:25:03,150 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:03,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:03,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-23 21:25:03,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:03,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:03,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:03,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:03,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:05,838 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:05,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:25:05,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:05,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:05,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:05,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 21:25:05,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:25:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:25:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:25:05,972 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-23 21:25:06,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:06,197 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-23 21:25:06,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:25:06,197 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-23 21:25:06,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:06,198 INFO L225 Difference]: With dead ends: 167 [2018-09-23 21:25:06,198 INFO L226 Difference]: Without dead ends: 165 [2018-09-23 21:25:06,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:25:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-23 21:25:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-23 21:25:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-23 21:25:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-23 21:25:06,201 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-23 21:25:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:06,202 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-23 21:25:06,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:25:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-23 21:25:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 21:25:06,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:06,203 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-23 21:25:06,203 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:06,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:06,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-23 21:25:06,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:06,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:06,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:06,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:06,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:08,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:08,538 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:25:08,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:08,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:08,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:08,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:08,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:08,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 21:25:08,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 21:25:08,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 21:25:08,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:25:08,665 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-23 21:25:08,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:08,837 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-23 21:25:08,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 21:25:08,837 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-23 21:25:08,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:08,838 INFO L225 Difference]: With dead ends: 169 [2018-09-23 21:25:08,838 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 21:25:08,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:25:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 21:25:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-23 21:25:08,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 21:25:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-23 21:25:08,842 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-23 21:25:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:08,842 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-23 21:25:08,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 21:25:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-23 21:25:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-23 21:25:08,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:08,843 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-23 21:25:08,843 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:08,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:08,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-23 21:25:08,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:08,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:08,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:08,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:08,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:11,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:11,698 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 [2018-09-23 21:25:11,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:13,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-23 21:25:13,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:13,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:13,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:13,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 21:25:13,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:25:13,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:25:13,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:25:13,651 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-23 21:25:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:13,815 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-23 21:25:13,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 21:25:13,816 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-23 21:25:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:13,817 INFO L225 Difference]: With dead ends: 171 [2018-09-23 21:25:13,817 INFO L226 Difference]: Without dead ends: 169 [2018-09-23 21:25:13,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:25:13,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-23 21:25:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-23 21:25:13,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 21:25:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-23 21:25:13,822 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-23 21:25:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:13,822 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-23 21:25:13,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:25:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-23 21:25:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 21:25:13,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:13,823 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-23 21:25:13,823 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:13,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:13,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-23 21:25:13,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:13,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:13,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:13,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:13,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:16,679 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:16,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:25:16,687 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:16,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:16,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:16,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:16,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:16,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 21:25:16,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 21:25:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 21:25:16,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:25:16,819 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-23 21:25:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:17,076 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-23 21:25:17,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 21:25:17,077 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-23 21:25:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:17,077 INFO L225 Difference]: With dead ends: 173 [2018-09-23 21:25:17,077 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 21:25:17,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:25:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 21:25:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-23 21:25:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-23 21:25:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-23 21:25:17,081 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-23 21:25:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:17,081 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-23 21:25:17,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 21:25:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-23 21:25:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 21:25:17,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:17,082 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-23 21:25:17,082 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:17,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:17,083 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-23 21:25:17,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:17,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:17,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:17,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:17,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:19,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:19,789 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 [2018-09-23 21:25:19,797 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:26,967 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-23 21:25:26,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:26,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:27,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:27,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:27,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 21:25:27,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:25:27,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:25:27,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:25:27,030 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-23 21:25:27,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:27,296 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-23 21:25:27,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 21:25:27,296 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-23 21:25:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:27,297 INFO L225 Difference]: With dead ends: 175 [2018-09-23 21:25:27,297 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 21:25:27,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:25:27,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 21:25:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-23 21:25:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 21:25:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-23 21:25:27,303 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-23 21:25:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:27,303 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-23 21:25:27,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:25:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-23 21:25:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-23 21:25:27,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:27,304 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-23 21:25:27,304 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:27,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:27,305 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-23 21:25:27,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:27,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:27,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:27,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:27,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:30,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:30,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:30,023 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 [2018-09-23 21:25:30,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:31,654 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-23 21:25:31,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:31,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:31,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:31,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:31,712 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 21:25:31,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 21:25:31,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 21:25:31,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:25:31,714 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-23 21:25:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:31,986 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-23 21:25:31,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 21:25:31,987 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-23 21:25:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:31,987 INFO L225 Difference]: With dead ends: 177 [2018-09-23 21:25:31,987 INFO L226 Difference]: Without dead ends: 175 [2018-09-23 21:25:31,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:25:31,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-23 21:25:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-23 21:25:31,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 21:25:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-23 21:25:31,992 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-23 21:25:31,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:31,992 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-23 21:25:31,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 21:25:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-23 21:25:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-23 21:25:31,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:31,993 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-23 21:25:31,993 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:31,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:31,994 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-23 21:25:31,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:31,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:31,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:31,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:31,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:34,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:34,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:25:34,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:34,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:34,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:34,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 21:25:34,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:25:34,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:25:34,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:25:34,862 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-23 21:25:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:35,152 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-23 21:25:35,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 21:25:35,153 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-23 21:25:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:35,154 INFO L225 Difference]: With dead ends: 179 [2018-09-23 21:25:35,154 INFO L226 Difference]: Without dead ends: 177 [2018-09-23 21:25:35,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:25:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-23 21:25:35,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-23 21:25:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-23 21:25:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-23 21:25:35,158 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-23 21:25:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:35,158 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-23 21:25:35,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:25:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-23 21:25:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-23 21:25:35,159 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:35,159 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-23 21:25:35,160 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:35,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:35,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-23 21:25:35,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:35,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:35,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:35,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:35,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:38,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:38,186 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 [2018-09-23 21:25:38,192 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:38,257 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:38,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:38,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:38,331 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:38,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 21:25:38,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 21:25:38,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 21:25:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:25:38,334 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-23 21:25:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:38,522 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-23 21:25:38,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 21:25:38,523 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-23 21:25:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:38,524 INFO L225 Difference]: With dead ends: 181 [2018-09-23 21:25:38,524 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 21:25:38,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:25:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 21:25:38,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-23 21:25:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 21:25:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-23 21:25:38,527 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-23 21:25:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:38,527 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-23 21:25:38,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 21:25:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-23 21:25:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 21:25:38,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:38,528 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-23 21:25:38,528 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:38,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:38,529 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-23 21:25:38,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:38,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:38,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:38,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:38,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:41,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:41,764 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 [2018-09-23 21:25:41,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:44,298 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-23 21:25:44,298 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:44,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:44,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:44,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 21:25:44,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:25:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:25:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:25:44,372 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-23 21:25:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:44,654 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-23 21:25:44,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 21:25:44,655 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-23 21:25:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:44,655 INFO L225 Difference]: With dead ends: 183 [2018-09-23 21:25:44,655 INFO L226 Difference]: Without dead ends: 181 [2018-09-23 21:25:44,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:25:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-23 21:25:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-23 21:25:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 21:25:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-23 21:25:44,659 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-23 21:25:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:44,659 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-23 21:25:44,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:25:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-23 21:25:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-23 21:25:44,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:44,660 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-23 21:25:44,660 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:44,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:44,660 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-23 21:25:44,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:44,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:44,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:44,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:44,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:47,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:47,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:25:47,891 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:47,954 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:47,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:47,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:48,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:48,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 21:25:48,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 21:25:48,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 21:25:48,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:25:48,011 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-23 21:25:48,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:48,190 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-23 21:25:48,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 21:25:48,190 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-23 21:25:48,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:48,192 INFO L225 Difference]: With dead ends: 185 [2018-09-23 21:25:48,192 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 21:25:48,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:25:48,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 21:25:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-23 21:25:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-23 21:25:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-23 21:25:48,196 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-23 21:25:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:48,196 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-23 21:25:48,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 21:25:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-23 21:25:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 21:25:48,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:48,197 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-23 21:25:48,197 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:48,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:48,197 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-23 21:25:48,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:48,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:48,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:48,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:48,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:51,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:51,285 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 [2018-09-23 21:25:51,294 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:01,584 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-23 21:26:01,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:01,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:01,648 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:01,648 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 21:26:01,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 21:26:01,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 21:26:01,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:26:01,650 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-23 21:26:01,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:01,963 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-23 21:26:01,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 21:26:01,963 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-23 21:26:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:01,964 INFO L225 Difference]: With dead ends: 187 [2018-09-23 21:26:01,964 INFO L226 Difference]: Without dead ends: 185 [2018-09-23 21:26:01,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:26:01,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-23 21:26:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-23 21:26:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-23 21:26:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-23 21:26:01,967 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-23 21:26:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:01,967 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-23 21:26:01,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 21:26:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-23 21:26:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-23 21:26:01,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:01,968 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-23 21:26:01,968 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:01,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:01,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-23 21:26:01,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:01,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:01,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:01,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:01,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:04,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:04,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:26:04,892 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:07,083 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-23 21:26:07,083 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:07,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:07,145 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:07,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-23 21:26:07,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 21:26:07,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 21:26:07,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:26:07,146 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-23 21:26:07,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:07,391 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-23 21:26:07,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 21:26:07,391 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-23 21:26:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:07,392 INFO L225 Difference]: With dead ends: 189 [2018-09-23 21:26:07,392 INFO L226 Difference]: Without dead ends: 187 [2018-09-23 21:26:07,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:26:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-23 21:26:07,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-23 21:26:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-23 21:26:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-23 21:26:07,397 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-23 21:26:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:07,397 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-23 21:26:07,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 21:26:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-23 21:26:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-23 21:26:07,398 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:07,398 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-23 21:26:07,398 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:07,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:07,399 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-23 21:26:07,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:07,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:07,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:07,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:07,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:10,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:10,506 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:26:10,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:10,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:10,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:10,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 21:26:10,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 21:26:10,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 21:26:10,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:26:10,650 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-23 21:26:10,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:10,829 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-23 21:26:10,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 21:26:10,829 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-23 21:26:10,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:10,830 INFO L225 Difference]: With dead ends: 191 [2018-09-23 21:26:10,830 INFO L226 Difference]: Without dead ends: 189 [2018-09-23 21:26:10,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:26:10,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-23 21:26:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-23 21:26:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-23 21:26:10,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-23 21:26:10,835 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-23 21:26:10,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:10,835 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-23 21:26:10,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 21:26:10,835 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-23 21:26:10,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 21:26:10,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:10,836 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-23 21:26:10,836 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:10,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-23 21:26:10,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:10,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:10,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:10,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:10,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:14,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:14,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:26:14,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:14,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:14,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:14,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:14,415 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:14,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-23 21:26:14,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 21:26:14,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 21:26:14,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:26:14,417 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-23 21:26:14,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:14,584 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-23 21:26:14,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 21:26:14,584 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-23 21:26:14,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:14,586 INFO L225 Difference]: With dead ends: 193 [2018-09-23 21:26:14,586 INFO L226 Difference]: Without dead ends: 191 [2018-09-23 21:26:14,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:26:14,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-23 21:26:14,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-23 21:26:14,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-23 21:26:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-23 21:26:14,590 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-23 21:26:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:14,590 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-23 21:26:14,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 21:26:14,591 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-23 21:26:14,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-23 21:26:14,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:14,591 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-23 21:26:14,591 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:14,592 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:14,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-23 21:26:14,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:14,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:14,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:14,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:14,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:18,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:18,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:26:18,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:26:22,027 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-23 21:26:22,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:22,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:22,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:22,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:22,102 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 21:26:22,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 21:26:22,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 21:26:22,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:26:22,103 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-23 21:26:22,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:22,305 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-23 21:26:22,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 21:26:22,305 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-23 21:26:22,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:22,306 INFO L225 Difference]: With dead ends: 195 [2018-09-23 21:26:22,306 INFO L226 Difference]: Without dead ends: 193 [2018-09-23 21:26:22,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:26:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-23 21:26:22,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-23 21:26:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-23 21:26:22,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-23 21:26:22,310 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-23 21:26:22,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:22,310 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-23 21:26:22,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 21:26:22,310 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-23 21:26:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-23 21:26:22,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:22,311 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-23 21:26:22,311 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:22,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:22,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-23 21:26:22,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:22,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:22,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:22,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:22,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:25,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:25,738 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 [2018-09-23 21:26:25,747 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:26:25,815 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:26:25,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:25,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:25,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:25,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-23 21:26:25,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 21:26:25,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 21:26:25,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:26:25,874 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-23 21:26:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:26,158 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-23 21:26:26,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 21:26:26,158 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-23 21:26:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:26,159 INFO L225 Difference]: With dead ends: 197 [2018-09-23 21:26:26,159 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 21:26:26,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:26:26,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 21:26:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-23 21:26:26,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-23 21:26:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-23 21:26:26,162 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-23 21:26:26,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:26,163 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-23 21:26:26,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 21:26:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-23 21:26:26,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-23 21:26:26,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:26,164 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-23 21:26:26,164 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:26,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-23 21:26:26,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:26,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:26,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:26,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:26,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:26,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:29,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:29,697 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:29,697 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 [2018-09-23 21:26:29,710 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:26:42,917 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-23 21:26:42,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:42,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:42,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:42,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 21:26:42,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 21:26:42,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 21:26:42,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:26:42,986 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-23 21:26:43,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:43,274 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-23 21:26:43,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 21:26:43,274 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-23 21:26:43,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:43,275 INFO L225 Difference]: With dead ends: 199 [2018-09-23 21:26:43,275 INFO L226 Difference]: Without dead ends: 197 [2018-09-23 21:26:43,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:26:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-23 21:26:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-23 21:26:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-23 21:26:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-23 21:26:43,279 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-23 21:26:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:43,280 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-23 21:26:43,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 21:26:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-23 21:26:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-23 21:26:43,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:43,281 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-23 21:26:43,281 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:43,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-23 21:26:43,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:43,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:43,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:43,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:43,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:46,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:46,648 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 [2018-09-23 21:26:46,656 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:49,356 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-23 21:26:49,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:49,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:49,434 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:49,434 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-23 21:26:49,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 21:26:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 21:26:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:26:49,436 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-23 21:26:49,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:49,625 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-23 21:26:49,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 21:26:49,626 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-23 21:26:49,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:49,627 INFO L225 Difference]: With dead ends: 201 [2018-09-23 21:26:49,627 INFO L226 Difference]: Without dead ends: 199 [2018-09-23 21:26:49,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:26:49,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-23 21:26:49,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-23 21:26:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 21:26:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-23 21:26:49,631 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-23 21:26:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:49,631 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-23 21:26:49,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 21:26:49,631 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-23 21:26:49,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-23 21:26:49,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:49,632 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-23 21:26:49,632 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:49,632 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:49,633 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-23 21:26:49,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:49,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:49,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:49,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:49,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:53,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:53,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:26:53,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Received shutdown request... [2018-09-23 21:26:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:53,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:53,488 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-23 21:26:53,689 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:53,690 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:26:53,695 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:26:53,695 INFO L202 PluginConnector]: Adding new model array1.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:26:53 BoogieIcfgContainer [2018-09-23 21:26:53,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:26:53,696 INFO L168 Benchmark]: Toolchain (without parser) took 243343.63 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -20.4 MB). Free memory was 1.4 GB in the beginning and 968.1 MB in the end (delta: 478.1 MB). Peak memory consumption was 457.7 MB. Max. memory is 7.1 GB. [2018-09-23 21:26:53,697 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:26:53,698 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:26:53,698 INFO L168 Benchmark]: Boogie Preprocessor took 19.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:26:53,698 INFO L168 Benchmark]: RCFGBuilder took 257.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:26:53,699 INFO L168 Benchmark]: TraceAbstraction took 243017.82 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -20.4 MB). Free memory was 1.4 GB in the beginning and 968.1 MB in the end (delta: 457.0 MB). Peak memory consumption was 436.5 MB. Max. memory is 7.1 GB. [2018-09-23 21:26:53,700 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.33 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 19.76 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 257.89 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 243017.82 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -20.4 MB). Free memory was 1.4 GB in the beginning and 968.1 MB in the end (delta: 457.0 MB). Peak memory consumption was 436.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 199 with TraceHistMax 98, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 242.9s OverallTime, 98 OverallIterations, 98 TraceHistogramMax, 17.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 388 SDtfs, 0 SDslu, 7887 SDs, 0 SdLazy, 7984 SolverSat, 159 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14450 GetRequests, 9697 SyntacticMatches, 0 SemanticMatches, 4753 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 136.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=199occurred in iteration=97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 97 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.8s SsaConstructionTime, 74.4s SatisfiabilityAnalysisTime, 140.9s InterpolantComputationTime, 19396 NumberOfCodeBlocks, 19396 NumberOfCodeBlocksAsserted, 2609 NumberOfCheckSat, 19203 ConstructedInterpolants, 0 QuantifiedInterpolants, 7490901 SizeOfPredicates, 96 NumberOfNonLiveVariables, 24528 ConjunctsInSsa, 4848 ConjunctsInUnsatCore, 193 InterpolantComputations, 1 PerfectInterpolantSequences, 0/608384 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/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-26-53-709.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/array1.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-26-53-709.csv Completed graceful shutdown