java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:51:24,128 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:51:24,130 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:51:24,142 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:51:24,142 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:51:24,143 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:51:24,145 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:51:24,147 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:51:24,149 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:51:24,149 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:51:24,151 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 12:51:24,151 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 12:51:24,152 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 12:51:24,153 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 12:51:24,154 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 12:51:24,155 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 12:51:24,156 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 12:51:24,158 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 12:51:24,160 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 12:51:24,162 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 12:51:24,163 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 12:51:24,164 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 12:51:24,167 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 12:51:24,167 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 12:51:24,167 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 12:51:24,168 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 12:51:24,169 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 12:51:24,170 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 12:51:24,171 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 12:51:24,172 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 12:51:24,173 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 12:51:24,173 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-04 12:51:24,174 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-04 12:51:24,174 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-04 12:51:24,175 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-04 12:51:24,176 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-04 12:51:24,176 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 12:51:24,193 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:51:24,193 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:51:24,194 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:51:24,194 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:51:24,195 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:51:24,195 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:51:24,195 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:51:24,196 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:51:24,196 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:51:24,196 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:51:24,196 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:51:24,197 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:51:24,197 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:51:24,197 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:51:24,197 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:51:24,197 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:51:24,198 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:51:24,198 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:51:24,198 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:51:24,199 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:51:24,199 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:51:24,199 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:51:24,199 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:51:24,199 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:51:24,200 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:51:24,200 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:51:24,200 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:51:24,200 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:51:24,200 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:51:24,201 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:51:24,201 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:51:24,257 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:51:24,275 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:51:24,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:51:24,284 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:51:24,284 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:51:24,285 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl [2018-10-04 12:51:24,285 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl' [2018-10-04 12:51:24,345 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:51:24,347 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:51:24,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:51:24,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:51:24,348 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:51:24,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:24" (1/1) ... [2018-10-04 12:51:24,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:24" (1/1) ... [2018-10-04 12:51:24,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:51:24,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:51:24,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:51:24,393 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:51:24,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:24" (1/1) ... [2018-10-04 12:51:24,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:24" (1/1) ... [2018-10-04 12:51:24,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:24" (1/1) ... [2018-10-04 12:51:24,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:24" (1/1) ... [2018-10-04 12:51:24,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:24" (1/1) ... [2018-10-04 12:51:24,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:24" (1/1) ... [2018-10-04 12:51:24,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:24" (1/1) ... [2018-10-04 12:51:24,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:51:24,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:51:24,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:51:24,419 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:51:24,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:51:24,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:51:24,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:51:24,746 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:51:24,747 INFO L202 PluginConnector]: Adding new model nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:51:24 BoogieIcfgContainer [2018-10-04 12:51:24,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:51:24,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:51:24,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:51:24,751 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:51:24,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:51:24" (1/2) ... [2018-10-04 12:51:24,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de15634 and model type nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:51:24, skipping insertion in model container [2018-10-04 12:51:24,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:51:24" (2/2) ... [2018-10-04 12:51:24,755 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bpl [2018-10-04 12:51:24,765 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:51:24,773 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:51:24,825 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:51:24,826 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:51:24,826 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:51:24,827 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:51:24,827 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:51:24,827 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:51:24,827 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:51:24,828 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:51:24,828 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:51:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 12:51:24,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:51:24,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:24,851 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:51:24,852 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:24,859 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:24,859 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 12:51:24,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:24,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:24,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:24,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:24,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:25,038 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:51:25,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:51:25,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:51:25,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:51:25,059 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:25,061 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 12:51:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:25,126 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 12:51:25,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:51:25,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 12:51:25,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:25,139 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:51:25,139 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:51:25,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 12:51:25,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:51:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-10-04 12:51:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:51:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 12:51:25,177 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-10-04 12:51:25,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:25,177 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 12:51:25,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:51:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 12:51:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:51:25,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:25,178 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:51:25,179 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:25,179 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:25,179 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-10-04 12:51:25,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:25,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:25,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:25,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:25,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:25,212 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:51:25,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:51:25,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:51:25,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:51:25,214 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:25,215 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-10-04 12:51:25,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:25,259 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-10-04 12:51:25,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:51:25,260 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-10-04 12:51:25,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:25,261 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:51:25,261 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:51:25,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 12:51:25,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:51:25,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:51:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:51:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 12:51:25,272 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 12:51:25,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:25,279 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 12:51:25,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:51:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 12:51:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:51:25,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:25,280 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:51:25,281 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:25,281 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:25,281 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-10-04 12:51:25,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:25,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:25,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:25,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:25,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:25,460 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:25,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:25,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:25,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:51:25,621 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:25,621 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-04 12:51:25,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:51:25,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:51:25,622 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:25,622 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-10-04 12:51:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:26,031 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-10-04 12:51:26,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:51:26,033 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-04 12:51:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:26,034 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:51:26,034 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:51:26,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 6 [2018-10-04 12:51:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:51:26,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-10-04 12:51:26,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:51:26,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-04 12:51:26,049 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2018-10-04 12:51:26,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:26,049 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-04 12:51:26,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:51:26,049 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-04 12:51:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:51:26,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:26,050 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1] [2018-10-04 12:51:26,052 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:26,052 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:26,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1881088987, now seen corresponding path program 2 times [2018-10-04 12:51:26,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:26,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:26,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:26,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:26,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-04 12:51:26,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:26,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:26,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:51:26,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:51:26,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:26,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-04 12:51:26,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:26,390 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-04 12:51:26,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:51:26,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:51:26,392 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:26,392 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2018-10-04 12:51:26,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:26,848 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-10-04 12:51:26,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:51:26,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-10-04 12:51:26,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:26,851 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:51:26,851 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:51:26,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 11 [2018-10-04 12:51:26,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:51:26,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2018-10-04 12:51:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:51:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-10-04 12:51:26,862 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2018-10-04 12:51:26,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:26,863 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-10-04 12:51:26,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:51:26,863 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-10-04 12:51:26,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:51:26,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:26,864 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 1, 1, 1] [2018-10-04 12:51:26,865 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:26,865 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:26,865 INFO L82 PathProgramCache]: Analyzing trace with hash 501354739, now seen corresponding path program 3 times [2018-10-04 12:51:26,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:26,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:26,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:26,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:26,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-04 12:51:27,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:27,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:27,309 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:51:27,387 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 12:51:27,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:27,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-04 12:51:27,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:27,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:51:27,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:51:27,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:51:27,475 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:27,475 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2018-10-04 12:51:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:27,546 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2018-10-04 12:51:27,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:51:27,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-10-04 12:51:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:27,552 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:51:27,552 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:51:27,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 4 [2018-10-04 12:51:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:51:27,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:51:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:51:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-04 12:51:27,570 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-10-04 12:51:27,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:27,573 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-04 12:51:27,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:51:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-04 12:51:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:51:27,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:27,575 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-10-04 12:51:27,575 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:27,575 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:27,575 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-10-04 12:51:27,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:27,576 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:27,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:27,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:27,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-04 12:51:27,817 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:27,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:27,832 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:51:27,869 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:51:27,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:27,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-04 12:51:28,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:28,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 9 [2018-10-04 12:51:28,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:51:28,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:51:28,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:28,067 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2018-10-04 12:51:28,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:28,291 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-10-04 12:51:28,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:51:28,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-10-04 12:51:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:28,297 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:51:28,297 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:51:28,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 8 [2018-10-04 12:51:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:51:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2018-10-04 12:51:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:51:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-10-04 12:51:28,311 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40 [2018-10-04 12:51:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:28,312 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-10-04 12:51:28,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:51:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-10-04 12:51:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:51:28,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:28,315 INFO L375 BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 1, 1, 1] [2018-10-04 12:51:28,315 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:28,315 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:28,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1874565441, now seen corresponding path program 5 times [2018-10-04 12:51:28,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:28,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:28,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:28,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:28,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-04 12:51:28,530 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:28,530 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:28,538 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:51:28,568 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:51:28,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:28,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 262 proven. 20 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-10-04 12:51:28,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:28,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-10-04 12:51:28,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:51:28,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:51:28,750 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:28,751 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states. [2018-10-04 12:51:29,371 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 12:51:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:30,085 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2018-10-04 12:51:30,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:51:30,093 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-04 12:51:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:30,094 INFO L225 Difference]: With dead ends: 127 [2018-10-04 12:51:30,094 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:51:30,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 25 [2018-10-04 12:51:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:51:30,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2018-10-04 12:51:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:51:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-10-04 12:51:30,123 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 52 [2018-10-04 12:51:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:30,125 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-10-04 12:51:30,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:51:30,125 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-10-04 12:51:30,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:51:30,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:30,132 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 1, 1, 1] [2018-10-04 12:51:30,132 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:30,133 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:30,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1734028097, now seen corresponding path program 6 times [2018-10-04 12:51:30,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:30,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:30,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:30,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:30,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-10-04 12:51:30,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:30,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:30,365 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:51:30,467 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-04 12:51:30,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:30,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 520 proven. 30 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-04 12:51:30,647 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:30,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-04 12:51:30,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:51:30,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:51:30,648 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:30,648 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 14 states. [2018-10-04 12:51:31,273 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 12:51:33,323 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 33 new depth: 31 [2018-10-04 12:51:33,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:33,792 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-10-04 12:51:33,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:51:33,793 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-10-04 12:51:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:33,794 INFO L225 Difference]: With dead ends: 175 [2018-10-04 12:51:33,794 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 12:51:33,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.2s impTime 36 [2018-10-04 12:51:33,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 12:51:33,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2018-10-04 12:51:33,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:51:33,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2018-10-04 12:51:33,814 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 74 [2018-10-04 12:51:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:33,815 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2018-10-04 12:51:33,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:51:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2018-10-04 12:51:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:51:33,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:33,817 INFO L375 BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 1, 1, 1] [2018-10-04 12:51:33,817 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:33,817 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:33,817 INFO L82 PathProgramCache]: Analyzing trace with hash 883432563, now seen corresponding path program 7 times [2018-10-04 12:51:33,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:33,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:33,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:33,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:33,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-10-04 12:51:34,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:34,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:34,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:34,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:34,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1554 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-04 12:51:34,918 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:34,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 14 [2018-10-04 12:51:34,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:51:34,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:51:34,919 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:34,919 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 15 states. [2018-10-04 12:51:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:35,259 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2018-10-04 12:51:35,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:51:35,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2018-10-04 12:51:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:35,261 INFO L225 Difference]: With dead ends: 133 [2018-10-04 12:51:35,262 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 12:51:35,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.2s impTime 12 [2018-10-04 12:51:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 12:51:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2018-10-04 12:51:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 12:51:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2018-10-04 12:51:35,284 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 100 [2018-10-04 12:51:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:35,285 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2018-10-04 12:51:35,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:51:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2018-10-04 12:51:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 12:51:35,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:35,287 INFO L375 BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 1, 1, 1] [2018-10-04 12:51:35,288 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:35,288 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:35,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1346298395, now seen corresponding path program 8 times [2018-10-04 12:51:35,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:35,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:35,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:35,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:51:35,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-04 12:51:36,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:36,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:36,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:51:36,178 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:51:36,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:36,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-04 12:51:36,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:36,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:51:36,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:51:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:51:36,470 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:36,470 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 10 states. [2018-10-04 12:51:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:36,728 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2018-10-04 12:51:36,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:51:36,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 116 [2018-10-04 12:51:36,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:36,734 INFO L225 Difference]: With dead ends: 149 [2018-10-04 12:51:36,734 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 12:51:36,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.5s impTime 8 [2018-10-04 12:51:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 12:51:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2018-10-04 12:51:36,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 12:51:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2018-10-04 12:51:36,760 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 116 [2018-10-04 12:51:36,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:36,760 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2018-10-04 12:51:36,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:51:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2018-10-04 12:51:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 12:51:36,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:36,763 INFO L375 BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 1, 1, 1] [2018-10-04 12:51:36,763 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:36,764 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:36,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1851587415, now seen corresponding path program 9 times [2018-10-04 12:51:36,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:36,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:36,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:36,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:36,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 0 proven. 2816 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-10-04 12:51:37,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:37,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:37,114 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:51:37,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 12:51:37,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:37,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 702 proven. 42 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2018-10-04 12:51:37,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:37,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-10-04 12:51:37,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:51:37,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:51:37,377 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:37,377 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 18 states. [2018-10-04 12:51:37,498 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 14 [2018-10-04 12:51:38,495 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 30 new depth: 28 [2018-10-04 12:51:39,648 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 43 new depth: 42 [2018-10-04 12:51:41,053 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 60 new depth: 60 [2018-10-04 12:51:41,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:41,235 INFO L93 Difference]: Finished difference Result 299 states and 327 transitions. [2018-10-04 12:51:41,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:51:41,235 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 132 [2018-10-04 12:51:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:41,236 INFO L225 Difference]: With dead ends: 299 [2018-10-04 12:51:41,236 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 12:51:41,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 1.7s impTime 63 [2018-10-04 12:51:41,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 12:51:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2018-10-04 12:51:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 12:51:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2018-10-04 12:51:41,262 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 132 [2018-10-04 12:51:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:41,262 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2018-10-04 12:51:41,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:51:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2018-10-04 12:51:41,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 12:51:41,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:41,265 INFO L375 BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 1, 1, 1] [2018-10-04 12:51:41,266 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:41,266 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:41,266 INFO L82 PathProgramCache]: Analyzing trace with hash -132347917, now seen corresponding path program 10 times [2018-10-04 12:51:41,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:41,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:41,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:41,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:41,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4698 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2018-10-04 12:51:41,551 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:41,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:41,561 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:51:41,619 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:51:41,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:41,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 1952 proven. 56 refuted. 0 times theorem prover too weak. 3194 trivial. 0 not checked. [2018-10-04 12:51:41,843 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:41,843 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-10-04 12:51:41,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:51:41,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:51:41,844 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:41,844 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 20 states. [2018-10-04 12:51:41,877 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 12:51:42,413 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 33 new depth: 26 [2018-10-04 12:51:43,171 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 41 new depth: 39 [2018-10-04 12:51:44,309 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 57 new depth: 57 [2018-10-04 12:51:45,319 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 74 new depth: 73 [2018-10-04 12:51:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:45,721 INFO L93 Difference]: Finished difference Result 371 states and 402 transitions. [2018-10-04 12:51:45,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 12:51:45,722 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2018-10-04 12:51:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:45,723 INFO L225 Difference]: With dead ends: 371 [2018-10-04 12:51:45,723 INFO L226 Difference]: Without dead ends: 223 [2018-10-04 12:51:45,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 1.9s impTime 80 [2018-10-04 12:51:45,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-04 12:51:45,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 205. [2018-10-04 12:51:45,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 12:51:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2018-10-04 12:51:45,752 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 166 [2018-10-04 12:51:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:45,753 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2018-10-04 12:51:45,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:51:45,753 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2018-10-04 12:51:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-04 12:51:45,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:45,756 INFO L375 BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 1, 1, 1] [2018-10-04 12:51:45,756 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:45,757 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1568317117, now seen corresponding path program 11 times [2018-10-04 12:51:45,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:45,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:45,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:45,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:45,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:46,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 0 proven. 7400 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-10-04 12:51:46,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:46,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:46,222 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:51:46,435 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 12:51:46,435 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:46,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:46,667 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 18 [2018-10-04 12:51:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 3774 proven. 72 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked. [2018-10-04 12:51:46,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:46,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-10-04 12:51:46,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:51:46,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:51:46,744 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:46,744 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand 22 states. [2018-10-04 12:51:47,301 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 34 new depth: 26 [2018-10-04 12:51:47,925 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 41 new depth: 40 [2018-10-04 12:51:48,719 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 58 new depth: 56 [2018-10-04 12:51:49,383 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 73 new depth: 71 [2018-10-04 12:51:50,993 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 88 new depth: 87 [2018-10-04 12:51:51,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:51:51,482 INFO L93 Difference]: Finished difference Result 451 states and 485 transitions. [2018-10-04 12:51:51,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-04 12:51:51,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 204 [2018-10-04 12:51:51,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:51:51,484 INFO L225 Difference]: With dead ends: 451 [2018-10-04 12:51:51,484 INFO L226 Difference]: Without dead ends: 267 [2018-10-04 12:51:51,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 1.7s impTime 99 [2018-10-04 12:51:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-04 12:51:51,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2018-10-04 12:51:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-04 12:51:51,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2018-10-04 12:51:51,514 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 204 [2018-10-04 12:51:51,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:51:51,515 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2018-10-04 12:51:51,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:51:51,515 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2018-10-04 12:51:51,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-04 12:51:51,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:51:51,518 INFO L375 BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 1, 1, 1] [2018-10-04 12:51:51,518 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:51:51,519 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:51:51,519 INFO L82 PathProgramCache]: Analyzing trace with hash 915329223, now seen corresponding path program 12 times [2018-10-04 12:51:51,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:51:51,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:51:51,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:51,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:51:51,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:51:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:51:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 0 proven. 11132 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-04 12:51:51,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:51:51,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:51:51,919 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:51:56,937 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-04 12:51:56,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:51:56,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:51:57,145 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 12:51:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 2022 proven. 90 refuted. 0 times theorem prover too weak. 10010 trivial. 0 not checked. [2018-10-04 12:51:57,269 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:51:57,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-10-04 12:51:57,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:51:57,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:51:57,270 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:51:57,270 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand 24 states. [2018-10-04 12:51:57,886 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 33 new depth: 26 [2018-10-04 12:51:58,828 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 41 new depth: 39 [2018-10-04 12:52:00,157 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 57 new depth: 56 [2018-10-04 12:52:00,882 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 73 new depth: 72 [2018-10-04 12:52:01,708 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 89 new depth: 87 [2018-10-04 12:52:03,711 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 104 new depth: 104 [2018-10-04 12:52:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:52:05,169 INFO L93 Difference]: Finished difference Result 539 states and 576 transitions. [2018-10-04 12:52:05,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-04 12:52:05,169 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2018-10-04 12:52:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:52:05,171 INFO L225 Difference]: With dead ends: 539 [2018-10-04 12:52:05,171 INFO L226 Difference]: Without dead ends: 315 [2018-10-04 12:52:05,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s Time 3.5s impTime 120 [2018-10-04 12:52:05,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-04 12:52:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 293. [2018-10-04 12:52:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-04 12:52:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions. [2018-10-04 12:52:05,213 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 246 [2018-10-04 12:52:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:52:05,214 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 305 transitions. [2018-10-04 12:52:05,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:52:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions. [2018-10-04 12:52:05,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-04 12:52:05,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:52:05,218 INFO L375 BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 1, 1, 1] [2018-10-04 12:52:05,218 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:52:05,218 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:52:05,218 INFO L82 PathProgramCache]: Analyzing trace with hash 154612223, now seen corresponding path program 13 times [2018-10-04 12:52:05,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:52:05,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:52:05,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:52:05,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:52:05,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:52:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:52:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-04 12:52:05,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:52:05,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:52:05,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:52:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:52:05,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:52:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-04 12:52:06,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:52:06,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:52:06,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:52:06,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:52:06,426 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:52:06,427 INFO L87 Difference]: Start difference. First operand 293 states and 305 transitions. Second operand 15 states. [2018-10-04 12:52:06,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:52:06,794 INFO L93 Difference]: Finished difference Result 341 states and 355 transitions. [2018-10-04 12:52:06,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:52:06,795 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 292 [2018-10-04 12:52:06,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:52:06,797 INFO L225 Difference]: With dead ends: 341 [2018-10-04 12:52:06,797 INFO L226 Difference]: Without dead ends: 339 [2018-10-04 12:52:06,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime 13 [2018-10-04 12:52:06,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-04 12:52:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317. [2018-10-04 12:52:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-10-04 12:52:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 330 transitions. [2018-10-04 12:52:06,840 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 330 transitions. Word has length 292 [2018-10-04 12:52:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:52:06,841 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 330 transitions. [2018-10-04 12:52:06,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:52:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 330 transitions. [2018-10-04 12:52:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-04 12:52:06,843 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:52:06,843 INFO L375 BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 1, 1, 1] [2018-10-04 12:52:06,843 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:52:06,844 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:52:06,844 INFO L82 PathProgramCache]: Analyzing trace with hash -114885159, now seen corresponding path program 14 times [2018-10-04 12:52:06,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:52:06,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:52:06,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:52:06,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:52:06,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:52:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:52:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-04 12:52:07,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:52:07,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:52:07,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:52:07,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:52:07,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:52:07,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:52:08,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-04 12:52:08,557 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:52:08,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:52:08,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:52:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:52:08,558 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:52:08,558 INFO L87 Difference]: Start difference. First operand 317 states and 330 transitions. Second operand 16 states. [2018-10-04 12:52:08,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:52:08,960 INFO L93 Difference]: Finished difference Result 365 states and 380 transitions. [2018-10-04 12:52:08,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:52:08,960 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 316 [2018-10-04 12:52:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:52:08,962 INFO L225 Difference]: With dead ends: 365 [2018-10-04 12:52:08,962 INFO L226 Difference]: Without dead ends: 363 [2018-10-04 12:52:08,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.4s impTime 14 [2018-10-04 12:52:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-04 12:52:09,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2018-10-04 12:52:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-10-04 12:52:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 355 transitions. [2018-10-04 12:52:09,012 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 355 transitions. Word has length 316 [2018-10-04 12:52:09,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:52:09,013 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 355 transitions. [2018-10-04 12:52:09,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:52:09,013 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 355 transitions. [2018-10-04 12:52:09,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-04 12:52:09,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:52:09,015 INFO L375 BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 1, 1, 1] [2018-10-04 12:52:09,015 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:52:09,015 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:52:09,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1438164045, now seen corresponding path program 15 times [2018-10-04 12:52:09,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:52:09,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:52:09,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:52:09,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:52:09,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:52:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:52:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 23772 backedges. 0 proven. 22232 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-04 12:52:09,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:52:09,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:52:09,590 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown