java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-00a8621 [2018-09-30 10:18:53,147 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:18:53,150 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:18:53,162 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:18:53,162 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:18:53,163 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:18:53,165 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:18:53,166 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:18:53,168 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:18:53,169 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:18:53,170 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 10:18:53,194 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 10:18:53,209 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:18:53,209 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:18:53,210 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:18:53,210 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:18:53,211 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:18:53,211 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:18:53,211 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:18:53,212 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:18:53,212 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:18:53,212 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:18:53,212 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:18:53,212 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:18:53,212 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:18:53,213 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:18:53,213 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:18:53,213 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:18:53,213 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:18:53,213 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:18:53,214 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:18:53,214 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:18:53,214 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:18:53,214 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:18:53,214 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:18:53,215 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:18:53,215 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:18:53,215 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:18:53,215 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:18:53,215 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:18:53,216 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:18:53,216 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:18:53,279 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:18:53,294 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:18:53,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:18:53,301 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:18:53,302 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:18:53,303 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-30 10:18:53,304 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-09-30 10:18:53,378 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:18:53,382 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:18:53,383 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:18:53,383 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:18:53,383 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:18:53,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:53" (1/1) ... [2018-09-30 10:18:53,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:53" (1/1) ... [2018-09-30 10:18:53,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:18:53,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:18:53,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:18:53,426 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:18:53,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:53" (1/1) ... [2018-09-30 10:18:53,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:53" (1/1) ... [2018-09-30 10:18:53,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:53" (1/1) ... [2018-09-30 10:18:53,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:53" (1/1) ... [2018-09-30 10:18:53,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:53" (1/1) ... [2018-09-30 10:18:53,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:53" (1/1) ... [2018-09-30 10:18:53,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:53" (1/1) ... [2018-09-30 10:18:53,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:18:53,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:18:53,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:18:53,451 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:18:53,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:18:53,525 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 10:18:53,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 10:18:53,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 10:18:53,840 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 10:18:53,841 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:18:53 BoogieIcfgContainer [2018-09-30 10:18:53,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:18:53,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:18:53,843 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:18:53,846 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:18:53,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:18:53" (1/2) ... [2018-09-30 10:18:53,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30071273 and model type fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:18:53, skipping insertion in model container [2018-09-30 10:18:53,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:18:53" (2/2) ... [2018-09-30 10:18:53,850 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-30 10:18:53,860 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:18:53,869 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:18:53,921 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:18:53,922 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:18:53,922 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:18:53,922 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:18:53,922 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:18:53,922 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:18:53,923 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:18:53,923 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:18:53,923 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:18:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-30 10:18:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:18:53,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:53,949 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:18:53,950 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:53,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:53,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1807861163, now seen corresponding path program 1 times [2018-09-30 10:18:53,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:53,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:54,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:54,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:54,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:54,119 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:18:54,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:18:54,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:18:54,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:18:54,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:18:54,144 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-30 10:18:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:54,200 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-30 10:18:54,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:18:54,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-30 10:18:54,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:54,213 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:18:54,214 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:18:54,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:18:54,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:18:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:18:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:18:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-30 10:18:54,254 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-30 10:18:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:54,254 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-30 10:18:54,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:18:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-30 10:18:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:18:54,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:54,256 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 10:18:54,256 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:54,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:54,256 INFO L82 PathProgramCache]: Analyzing trace with hash 89245487, now seen corresponding path program 1 times [2018-09-30 10:18:54,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:54,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:54,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:54,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:54,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:54,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:54,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:54,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:54,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:54,510 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:54,510 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 10:18:54,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:18:54,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:18:54,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:18:54,512 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-30 10:18:54,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:54,558 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-30 10:18:54,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:18:54,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-09-30 10:18:54,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:54,561 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:18:54,561 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:18:54,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:18:54,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:18:54,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:18:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:18:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-30 10:18:54,566 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-30 10:18:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:54,566 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-30 10:18:54,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:18:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-30 10:18:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:18:54,567 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:54,567 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:18:54,568 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:54,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:54,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2061989811, now seen corresponding path program 2 times [2018-09-30 10:18:54,568 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:54,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:54,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:54,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:54,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:18:54,713 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:18:54,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 10:18:54,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:18:54,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:18:54,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:18:54,714 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2018-09-30 10:18:54,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:54,792 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2018-09-30 10:18:54,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:18:54,793 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-30 10:18:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:54,794 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:18:54,794 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:18:54,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:18:54,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:18:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2018-09-30 10:18:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:18:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-09-30 10:18:54,801 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2018-09-30 10:18:54,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:54,802 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2018-09-30 10:18:54,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:18:54,802 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2018-09-30 10:18:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:18:54,803 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:54,803 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-30 10:18:54,803 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:54,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:54,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2062049393, now seen corresponding path program 1 times [2018-09-30 10:18:54,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:54,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:54,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:54,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:54,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-30 10:18:54,870 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:18:54,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 10:18:54,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 10:18:54,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 10:18:54,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 10:18:54,872 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2018-09-30 10:18:54,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:54,993 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2018-09-30 10:18:54,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:18:54,993 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-09-30 10:18:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:54,994 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:18:54,995 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:18:54,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:18:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:18:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-09-30 10:18:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:18:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-30 10:18:55,003 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2018-09-30 10:18:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:55,003 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-30 10:18:55,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 10:18:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-30 10:18:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:18:55,004 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:55,004 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2018-09-30 10:18:55,005 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:55,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:55,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1980186676, now seen corresponding path program 1 times [2018-09-30 10:18:55,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:55,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:55,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:55,007 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:55,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:55,256 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:55,256 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:55,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:55,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:55,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:55,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 10:18:55,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:18:55,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:18:55,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:18:55,341 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2018-09-30 10:18:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:55,402 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-09-30 10:18:55,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:18:55,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-09-30 10:18:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:55,403 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:18:55,403 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:18:55,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:18:55,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:18:55,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:18:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:18:55,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-30 10:18:55,411 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-30 10:18:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:55,411 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-30 10:18:55,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:18:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-30 10:18:55,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:18:55,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:55,413 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:18:55,413 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:55,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1317950664, now seen corresponding path program 2 times [2018-09-30 10:18:55,414 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:55,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:55,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:55,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:55,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:55,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:55,546 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:55,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:55,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:18:55,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:18:55,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:55,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:55,607 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:55,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:55,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 10:18:55,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:18:55,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:18:55,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:18:55,635 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-09-30 10:18:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:55,729 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-09-30 10:18:55,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:18:55,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-09-30 10:18:55,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:55,730 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:18:55,730 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:18:55,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:18:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:18:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:18:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:18:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-30 10:18:55,737 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2018-09-30 10:18:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:55,738 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-30 10:18:55,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:18:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-30 10:18:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:18:55,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:55,739 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:18:55,739 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:55,740 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:55,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1142069956, now seen corresponding path program 3 times [2018-09-30 10:18:55,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:55,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:55,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:55,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:55,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:55,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:55,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:55,866 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:18:55,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-30 10:18:55,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:55,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:55,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:55,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 10:18:55,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:18:55,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:18:55,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:18:55,926 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2018-09-30 10:18:55,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:55,969 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-09-30 10:18:55,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:18:55,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-09-30 10:18:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:55,975 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:18:55,975 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:18:55,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:18:55,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:18:55,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:18:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:18:55,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-09-30 10:18:55,982 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-09-30 10:18:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:55,982 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-09-30 10:18:55,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:18:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-09-30 10:18:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:18:55,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:55,983 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:18:55,984 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:55,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:55,984 INFO L82 PathProgramCache]: Analyzing trace with hash -375565888, now seen corresponding path program 4 times [2018-09-30 10:18:55,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:55,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:55,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:55,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:55,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:56,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:56,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:56,265 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:18:56,303 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:18:56,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:56,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:56,313 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:56,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:56,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 10:18:56,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:18:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:18:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:18:56,343 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2018-09-30 10:18:56,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:56,446 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-09-30 10:18:56,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:18:56,449 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-30 10:18:56,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:56,450 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:18:56,450 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:18:56,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:18:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:18:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:18:56,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:18:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-30 10:18:56,462 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-30 10:18:56,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:56,463 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-30 10:18:56,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:18:56,463 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-30 10:18:56,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:18:56,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:56,464 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:18:56,467 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:56,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1465268668, now seen corresponding path program 5 times [2018-09-30 10:18:56,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:56,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:56,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:56,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:56,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:56,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:56,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:56,799 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:18:56,850 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:18:56,850 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:56,853 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:56,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:56,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 10:18:56,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:18:56,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:18:56,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:18:56,891 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2018-09-30 10:18:56,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:56,942 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-09-30 10:18:56,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:18:56,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-09-30 10:18:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:56,945 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:18:56,946 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:18:56,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:18:56,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:18:56,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:18:56,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:18:56,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-30 10:18:56,955 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2018-09-30 10:18:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:56,956 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-30 10:18:56,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:18:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-30 10:18:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:18:56,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:56,957 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:18:56,957 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:56,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:56,958 INFO L82 PathProgramCache]: Analyzing trace with hash 980751032, now seen corresponding path program 6 times [2018-09-30 10:18:56,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:56,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:56,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:56,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:56,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:57,145 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:57,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:57,154 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:18:57,282 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-30 10:18:57,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:57,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:57,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:57,342 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 10:18:57,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:18:57,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:18:57,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:18:57,343 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2018-09-30 10:18:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:57,472 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-09-30 10:18:57,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:18:57,475 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-09-30 10:18:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:57,476 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:18:57,476 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:18:57,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:18:57,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:18:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:18:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:18:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-09-30 10:18:57,483 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2018-09-30 10:18:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:57,483 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-09-30 10:18:57,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:18:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-09-30 10:18:57,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:18:57,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:57,485 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:18:57,485 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:57,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:57,485 INFO L82 PathProgramCache]: Analyzing trace with hash -784229196, now seen corresponding path program 7 times [2018-09-30 10:18:57,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:57,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:57,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:57,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:57,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:57,668 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:57,669 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:57,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:57,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:57,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:57,751 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:57,751 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 10:18:57,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:18:57,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:18:57,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:18:57,753 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2018-09-30 10:18:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:57,813 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-09-30 10:18:57,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:18:57,819 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-09-30 10:18:57,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:57,820 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:18:57,820 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:18:57,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:18:57,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:18:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:18:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:18:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-30 10:18:57,828 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2018-09-30 10:18:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:57,829 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-30 10:18:57,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:18:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-30 10:18:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:18:57,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:57,830 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:18:57,830 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:57,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:57,832 INFO L82 PathProgramCache]: Analyzing trace with hash -418146384, now seen corresponding path program 8 times [2018-09-30 10:18:57,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:57,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:57,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:57,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:18:57,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:58,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:58,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:58,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:18:58,084 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:18:58,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:58,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:58,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:58,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 10:18:58,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:18:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:18:58,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:18:58,120 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2018-09-30 10:18:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:58,390 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-09-30 10:18:58,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:18:58,391 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-09-30 10:18:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:58,392 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:18:58,392 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:18:58,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:18:58,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:18:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:18:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:18:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-30 10:18:58,402 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2018-09-30 10:18:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:58,402 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-30 10:18:58,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:18:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-30 10:18:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:18:58,403 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:58,406 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:18:58,406 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:58,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:58,407 INFO L82 PathProgramCache]: Analyzing trace with hash -799882324, now seen corresponding path program 9 times [2018-09-30 10:18:58,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:58,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:58,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:58,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:58,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:58,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:58,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:58,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:18:58,670 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-30 10:18:58,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:58,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:58,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:58,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 10:18:58,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:18:58,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:18:58,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:18:58,716 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2018-09-30 10:18:58,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:58,823 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2018-09-30 10:18:58,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:18:58,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-09-30 10:18:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:58,825 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:18:58,825 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:18:58,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:18:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:18:58,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:18:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:18:58,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-09-30 10:18:58,831 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2018-09-30 10:18:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:58,831 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-09-30 10:18:58,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:18:58,831 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-09-30 10:18:58,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:18:58,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:58,832 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:18:58,833 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:58,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:58,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1719066792, now seen corresponding path program 10 times [2018-09-30 10:18:58,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:58,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:58,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:58,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:58,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:59,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:59,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:59,102 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:18:59,145 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:18:59,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:59,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:59,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:59,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 10:18:59,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:18:59,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:18:59,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:18:59,188 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2018-09-30 10:18:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:59,263 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-09-30 10:18:59,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:18:59,263 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-30 10:18:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:59,264 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:18:59,264 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:18:59,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:18:59,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:18:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:18:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:18:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-30 10:18:59,272 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-30 10:18:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:59,272 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-30 10:18:59,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:18:59,272 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-30 10:18:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:18:59,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:59,273 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:18:59,274 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:59,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:59,274 INFO L82 PathProgramCache]: Analyzing trace with hash 67612324, now seen corresponding path program 11 times [2018-09-30 10:18:59,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:59,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:59,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:59,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:59,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:18:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:59,508 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:18:59,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:18:59,519 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:18:59,553 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:18:59,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:18:59,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:18:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:18:59,592 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:18:59,592 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 10:18:59,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:18:59,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:18:59,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:18:59,593 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-30 10:18:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:18:59,638 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2018-09-30 10:18:59,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:18:59,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-30 10:18:59,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:18:59,643 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:18:59,644 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:18:59,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:18:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:18:59,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:18:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:18:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-30 10:18:59,651 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2018-09-30 10:18:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:18:59,652 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-30 10:18:59,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:18:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-30 10:18:59,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:18:59,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:18:59,653 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:18:59,653 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:18:59,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:18:59,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2137199200, now seen corresponding path program 12 times [2018-09-30 10:18:59,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:18:59,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:18:59,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:59,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:18:59,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:18:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:00,859 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:00,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:00,867 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:01,011 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-30 10:19:01,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:01,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:01,039 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:01,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:01,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 10:19:01,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:19:01,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:19:01,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:19:01,073 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2018-09-30 10:19:01,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:01,176 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-09-30 10:19:01,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:19:01,182 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-09-30 10:19:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:01,183 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:19:01,183 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:19:01,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:19:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:19:01,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:19:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:19:01,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-30 10:19:01,189 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2018-09-30 10:19:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:01,189 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-30 10:19:01,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:19:01,190 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-30 10:19:01,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:19:01,190 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:01,190 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:01,191 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:01,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:01,191 INFO L82 PathProgramCache]: Analyzing trace with hash 752770460, now seen corresponding path program 13 times [2018-09-30 10:19:01,191 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:01,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:01,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:01,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:01,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:01,434 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:01,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:01,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:01,442 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:01,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:01,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:01,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 10:19:01,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:19:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:19:01,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:19:01,532 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2018-09-30 10:19:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:01,809 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2018-09-30 10:19:01,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:19:01,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-30 10:19:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:01,811 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:19:01,811 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:19:01,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:19:01,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:19:01,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:19:01,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:19:01,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-30 10:19:01,820 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-30 10:19:01,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:01,820 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-30 10:19:01,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:19:01,821 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-30 10:19:01,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:19:01,821 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:01,822 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:01,822 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:01,822 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:01,822 INFO L82 PathProgramCache]: Analyzing trace with hash -830226792, now seen corresponding path program 14 times [2018-09-30 10:19:01,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:01,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:01,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:01,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:01,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:02,264 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:02,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:02,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:02,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:02,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:02,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:02,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:02,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 10:19:02,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:19:02,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:19:02,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:19:02,385 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2018-09-30 10:19:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:02,496 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2018-09-30 10:19:02,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:19:02,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2018-09-30 10:19:02,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:02,499 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:19:02,499 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:19:02,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:19:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:19:02,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:19:02,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:19:02,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-30 10:19:02,506 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2018-09-30 10:19:02,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:02,506 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-30 10:19:02,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:19:02,506 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-30 10:19:02,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:19:02,507 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:02,507 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:02,507 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:02,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1672163180, now seen corresponding path program 15 times [2018-09-30 10:19:02,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:02,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:02,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:02,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:02,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:02,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:02,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:02,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:03,063 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-30 10:19:03,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:03,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:03,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:03,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 10:19:03,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:19:03,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:19:03,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:19:03,105 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2018-09-30 10:19:03,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:03,209 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2018-09-30 10:19:03,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:19:03,209 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-09-30 10:19:03,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:03,210 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:19:03,210 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:19:03,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:19:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:19:03,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:19:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:19:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-09-30 10:19:03,217 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2018-09-30 10:19:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:03,218 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-09-30 10:19:03,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:19:03,218 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-09-30 10:19:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:19:03,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:03,219 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:03,219 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:03,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:03,219 INFO L82 PathProgramCache]: Analyzing trace with hash 975786896, now seen corresponding path program 16 times [2018-09-30 10:19:03,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:03,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:03,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:03,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:03,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:03,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:03,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:03,535 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:03,568 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:03,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:03,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:03,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:03,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 10:19:03,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:19:03,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:19:03,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:19:03,607 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2018-09-30 10:19:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:03,707 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-09-30 10:19:03,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:19:03,708 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2018-09-30 10:19:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:03,708 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:19:03,708 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:19:03,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:19:03,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:19:03,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:19:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:19:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2018-09-30 10:19:03,719 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2018-09-30 10:19:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:03,719 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2018-09-30 10:19:03,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:19:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2018-09-30 10:19:03,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:19:03,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:03,720 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:03,721 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:03,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1259796596, now seen corresponding path program 17 times [2018-09-30 10:19:03,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:03,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:03,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:03,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:03,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:04,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:04,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:04,259 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:04,304 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:19:04,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:04,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:04,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:04,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 10:19:04,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:19:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:19:04,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:19:04,352 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2018-09-30 10:19:04,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:04,548 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2018-09-30 10:19:04,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:19:04,548 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2018-09-30 10:19:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:04,549 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:19:04,549 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:19:04,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:19:04,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:19:04,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:19:04,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:19:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-30 10:19:04,555 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2018-09-30 10:19:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:04,556 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-30 10:19:04,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:19:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-30 10:19:04,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:19:04,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:04,557 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:04,557 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:04,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:04,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2123082888, now seen corresponding path program 18 times [2018-09-30 10:19:04,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:04,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:04,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:04,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:04,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:05,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:05,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:05,029 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:05,075 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-30 10:19:05,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:05,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:05,120 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:05,120 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 10:19:05,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:19:05,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:19:05,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:19:05,122 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-09-30 10:19:05,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:05,233 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2018-09-30 10:19:05,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:19:05,235 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2018-09-30 10:19:05,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:05,235 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:19:05,236 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:19:05,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:19:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:19:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:19:05,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:19:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-09-30 10:19:05,241 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2018-09-30 10:19:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:05,242 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-09-30 10:19:05,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:19:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-09-30 10:19:05,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:19:05,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:05,243 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:05,243 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:05,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:05,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1780023940, now seen corresponding path program 19 times [2018-09-30 10:19:05,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:05,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:05,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:05,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:05,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:05,726 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:05,726 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:05,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:05,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:05,812 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:05,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 10:19:05,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:19:05,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:19:05,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:19:05,814 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 23 states. [2018-09-30 10:19:05,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:05,903 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2018-09-30 10:19:05,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:19:05,906 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2018-09-30 10:19:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:05,907 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:19:05,907 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:19:05,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:19:05,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:19:05,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:19:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:19:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-30 10:19:05,914 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-30 10:19:05,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:05,914 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-30 10:19:05,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:19:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-30 10:19:05,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:19:05,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:05,915 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:05,916 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:05,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:05,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1482110592, now seen corresponding path program 20 times [2018-09-30 10:19:05,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:05,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:05,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:05,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:05,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:05,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:06,313 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:06,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:06,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:06,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:06,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:06,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:06,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:06,385 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:06,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:06,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 10:19:06,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:19:06,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:19:06,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:19:06,418 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2018-09-30 10:19:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:06,614 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-09-30 10:19:06,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:19:06,615 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2018-09-30 10:19:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:06,616 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:19:06,616 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:19:06,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:19:06,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:19:06,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:19:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:19:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-30 10:19:06,622 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2018-09-30 10:19:06,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:06,622 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-30 10:19:06,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:19:06,622 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-30 10:19:06,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:19:06,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:06,623 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:06,623 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:06,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:06,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1067269764, now seen corresponding path program 21 times [2018-09-30 10:19:06,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:06,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:06,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:06,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:06,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:07,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:07,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:07,144 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:07,196 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-30 10:19:07,196 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:07,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:07,237 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:07,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 10:19:07,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:19:07,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:19:07,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:19:07,239 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2018-09-30 10:19:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:07,287 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2018-09-30 10:19:07,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:19:07,288 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2018-09-30 10:19:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:07,288 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:19:07,289 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:19:07,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:19:07,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:19:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:19:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:19:07,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-09-30 10:19:07,292 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2018-09-30 10:19:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:07,293 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-09-30 10:19:07,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:19:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-09-30 10:19:07,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:19:07,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:07,294 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:07,294 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:07,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:07,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1837192584, now seen corresponding path program 22 times [2018-09-30 10:19:07,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:07,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:07,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:07,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:07,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:07,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:07,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:07,784 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:07,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:07,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:07,820 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:07,820 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 10:19:07,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:19:07,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:19:07,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:19:07,821 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 26 states. [2018-09-30 10:19:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:07,896 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-09-30 10:19:07,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:19:07,897 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-09-30 10:19:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:07,897 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:19:07,898 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:19:07,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:19:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:19:07,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:19:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:19:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-30 10:19:07,901 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-30 10:19:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:07,902 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-30 10:19:07,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:19:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-30 10:19:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:19:07,902 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:07,902 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:07,902 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:07,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1296319604, now seen corresponding path program 23 times [2018-09-30 10:19:07,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:07,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:07,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:07,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:09,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:09,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:09,307 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:09,364 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 10:19:09,364 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:09,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:09,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:09,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 10:19:09,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:19:09,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:19:09,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:19:09,410 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 27 states. [2018-09-30 10:19:09,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:09,697 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2018-09-30 10:19:09,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:19:09,701 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2018-09-30 10:19:09,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:09,702 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:19:09,702 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:19:09,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:19:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:19:09,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:19:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:19:09,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-30 10:19:09,706 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2018-09-30 10:19:09,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:09,706 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-30 10:19:09,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:19:09,706 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-30 10:19:09,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:19:09,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:09,707 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:09,707 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:09,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:09,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1829457776, now seen corresponding path program 24 times [2018-09-30 10:19:09,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:09,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:09,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:09,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:09,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:10,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:10,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:10,261 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:10,318 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-30 10:19:10,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:10,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:10,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:10,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 10:19:10,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:19:10,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:19:10,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:19:10,353 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2018-09-30 10:19:10,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:10,457 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2018-09-30 10:19:10,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:19:10,457 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2018-09-30 10:19:10,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:10,458 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:19:10,458 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:19:10,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:19:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:19:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:19:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:19:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2018-09-30 10:19:10,462 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2018-09-30 10:19:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:10,463 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2018-09-30 10:19:10,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:19:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2018-09-30 10:19:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:19:10,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:10,463 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:10,464 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:10,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:10,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1220834452, now seen corresponding path program 25 times [2018-09-30 10:19:10,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:10,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:10,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:10,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:10,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:11,040 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:11,040 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:11,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:11,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:11,135 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:11,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 10:19:11,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:19:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:19:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:19:11,136 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2018-09-30 10:19:11,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:11,257 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-09-30 10:19:11,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:19:11,261 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2018-09-30 10:19:11,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:11,262 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:19:11,262 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:19:11,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:19:11,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:19:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:19:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:19:11,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-09-30 10:19:11,268 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2018-09-30 10:19:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:11,269 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-09-30 10:19:11,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:19:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-09-30 10:19:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:19:11,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:11,270 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:11,270 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:11,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:11,270 INFO L82 PathProgramCache]: Analyzing trace with hash 910997608, now seen corresponding path program 26 times [2018-09-30 10:19:11,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:11,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:11,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:11,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:11,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:12,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:12,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:12,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:12,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:12,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:12,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:12,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:12,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 10:19:12,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:19:12,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:19:12,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:19:12,129 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2018-09-30 10:19:12,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:12,203 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2018-09-30 10:19:12,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:19:12,203 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2018-09-30 10:19:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:12,204 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:19:12,204 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:19:12,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:19:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:19:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:19:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:19:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-30 10:19:12,209 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2018-09-30 10:19:12,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:12,210 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-30 10:19:12,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:19:12,210 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-30 10:19:12,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:19:12,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:12,210 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:12,211 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:12,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:12,211 INFO L82 PathProgramCache]: Analyzing trace with hash 902207076, now seen corresponding path program 27 times [2018-09-30 10:19:12,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:12,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:12,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:12,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:12,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:13,244 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:13,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:13,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:13,344 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-30 10:19:13,344 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:13,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:13,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:13,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 10:19:13,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:19:13,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:19:13,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:19:13,383 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2018-09-30 10:19:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:13,460 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-09-30 10:19:13,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:19:13,461 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2018-09-30 10:19:13,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:13,462 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:19:13,462 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:19:13,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:19:13,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:19:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:19:13,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:19:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-09-30 10:19:13,468 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2018-09-30 10:19:13,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:13,468 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-09-30 10:19:13,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:19:13,468 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-09-30 10:19:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:19:13,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:13,469 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:13,469 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:13,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:13,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1044440416, now seen corresponding path program 28 times [2018-09-30 10:19:13,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:13,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:13,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:13,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:13,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:14,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:14,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:14,423 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:14,474 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:14,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:14,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:14,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:14,516 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 10:19:14,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:19:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:19:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:19:14,517 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 32 states. [2018-09-30 10:19:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:14,626 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2018-09-30 10:19:14,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:19:14,633 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2018-09-30 10:19:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:14,634 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:19:14,634 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:19:14,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:19:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:19:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:19:14,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:19:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-30 10:19:14,639 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-30 10:19:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:14,640 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-30 10:19:14,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:19:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-30 10:19:14,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:19:14,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:14,641 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:14,641 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:14,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:14,641 INFO L82 PathProgramCache]: Analyzing trace with hash 291726684, now seen corresponding path program 29 times [2018-09-30 10:19:14,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:14,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:14,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:14,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:14,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:14,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:15,138 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:15,138 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:15,147 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:15,209 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 10:19:15,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:15,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:15,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:15,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 10:19:15,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:19:15,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:19:15,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:19:15,250 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2018-09-30 10:19:15,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:15,349 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2018-09-30 10:19:15,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:19:15,350 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2018-09-30 10:19:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:15,351 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:19:15,351 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:19:15,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:19:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:19:15,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:19:15,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:19:15,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-30 10:19:15,357 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2018-09-30 10:19:15,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:15,357 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-30 10:19:15,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:19:15,357 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-30 10:19:15,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:19:15,358 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:15,358 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:15,358 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:15,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:15,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1511664040, now seen corresponding path program 30 times [2018-09-30 10:19:15,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:15,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:15,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:15,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:15,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:16,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:16,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:16,358 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:16,427 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-30 10:19:16,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:16,431 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:16,468 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:16,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 10:19:16,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:19:16,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:19:16,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:19:16,470 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 34 states. [2018-09-30 10:19:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:16,549 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2018-09-30 10:19:16,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:19:16,550 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-09-30 10:19:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:16,551 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:19:16,551 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:19:16,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:19:16,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:19:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:19:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:19:16,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-09-30 10:19:16,556 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2018-09-30 10:19:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:16,557 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-09-30 10:19:16,557 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:19:16,557 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-09-30 10:19:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:19:16,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:16,557 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:16,557 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:16,558 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:16,558 INFO L82 PathProgramCache]: Analyzing trace with hash 596637780, now seen corresponding path program 31 times [2018-09-30 10:19:16,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:16,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:16,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:16,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:16,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:17,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:17,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:17,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:17,435 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:17,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:17,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 10:19:17,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:19:17,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:19:17,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:19:17,489 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 35 states. [2018-09-30 10:19:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:17,616 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2018-09-30 10:19:17,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:19:17,616 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2018-09-30 10:19:17,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:17,617 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:19:17,617 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:19:17,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:19:17,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:19:17,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:19:17,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:19:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-30 10:19:17,622 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-30 10:19:17,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:17,623 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-30 10:19:17,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:19:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-30 10:19:17,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:19:17,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:17,624 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:17,624 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:17,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:17,624 INFO L82 PathProgramCache]: Analyzing trace with hash -549876912, now seen corresponding path program 32 times [2018-09-30 10:19:17,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:17,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:17,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:17,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:17,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:18,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:18,167 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:18,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:18,174 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:18,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:18,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:18,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:18,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:18,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 10:19:18,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:19:18,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:19:18,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:19:18,264 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2018-09-30 10:19:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:18,430 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2018-09-30 10:19:18,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:19:18,430 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2018-09-30 10:19:18,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:18,431 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:19:18,431 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:19:18,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:19:18,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:19:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:19:18,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:19:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-30 10:19:18,438 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2018-09-30 10:19:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:18,439 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-30 10:19:18,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:19:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-30 10:19:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:19:18,440 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:18,440 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:18,440 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:18,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:18,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1456099148, now seen corresponding path program 33 times [2018-09-30 10:19:18,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:18,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:18,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:18,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:18,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:18,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:19,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:19,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:19,109 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:19,194 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-30 10:19:19,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:19,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:19,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:19,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 10:19:19,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:19:19,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:19:19,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:19:19,244 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 37 states. [2018-09-30 10:19:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:19,489 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2018-09-30 10:19:19,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:19:19,490 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2018-09-30 10:19:19,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:19,491 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:19:19,491 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 10:19:19,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:19:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 10:19:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 10:19:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 10:19:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-09-30 10:19:19,497 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2018-09-30 10:19:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:19,498 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-09-30 10:19:19,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:19:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-09-30 10:19:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:19:19,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:19,498 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:19,499 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:19,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:19,499 INFO L82 PathProgramCache]: Analyzing trace with hash 758776904, now seen corresponding path program 34 times [2018-09-30 10:19:19,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:19,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:19,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:19,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:19,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:20,223 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:20,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:20,230 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:20,282 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:20,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:20,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:20,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:20,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 10:19:20,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:19:20,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:19:20,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:19:20,322 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 38 states. [2018-09-30 10:19:20,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:20,460 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-09-30 10:19:20,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:19:20,461 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2018-09-30 10:19:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:20,462 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:19:20,462 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 10:19:20,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:19:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 10:19:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 10:19:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 10:19:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2018-09-30 10:19:20,469 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2018-09-30 10:19:20,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:20,470 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2018-09-30 10:19:20,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:19:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2018-09-30 10:19:20,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:19:20,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:20,471 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:20,471 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:20,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:20,471 INFO L82 PathProgramCache]: Analyzing trace with hash 646998596, now seen corresponding path program 35 times [2018-09-30 10:19:20,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:20,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:20,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:20,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:20,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:21,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:21,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:21,070 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:21,166 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 10:19:21,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:21,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:21,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:21,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 10:19:21,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:19:21,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:19:21,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:19:21,219 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 39 states. [2018-09-30 10:19:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:22,285 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2018-09-30 10:19:22,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:19:22,285 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2018-09-30 10:19:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:22,286 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:19:22,286 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:19:22,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:19:22,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:19:22,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:19:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:19:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-30 10:19:22,292 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2018-09-30 10:19:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:22,293 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-30 10:19:22,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:19:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-30 10:19:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:19:22,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:22,293 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:22,294 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:22,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash 602227008, now seen corresponding path program 36 times [2018-09-30 10:19:22,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:22,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:22,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:22,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:22,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:23,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:23,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:23,909 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:23,994 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-30 10:19:23,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:23,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:24,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:24,039 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 10:19:24,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:19:24,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:19:24,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:19:24,040 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 40 states. [2018-09-30 10:19:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:24,106 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2018-09-30 10:19:24,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:19:24,107 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2018-09-30 10:19:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:24,108 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:19:24,108 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 10:19:24,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:19:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 10:19:24,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 10:19:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 10:19:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2018-09-30 10:19:24,114 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2018-09-30 10:19:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:24,114 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2018-09-30 10:19:24,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:19:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2018-09-30 10:19:24,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:19:24,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:24,115 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:24,115 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:24,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash 526403900, now seen corresponding path program 37 times [2018-09-30 10:19:24,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:24,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:24,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:24,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:24,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:25,179 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:25,179 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:25,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:25,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:25,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:25,287 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 10:19:25,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:19:25,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:19:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:19:25,288 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 41 states. [2018-09-30 10:19:25,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:25,348 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2018-09-30 10:19:25,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:19:25,349 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2018-09-30 10:19:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:25,350 INFO L225 Difference]: With dead ends: 109 [2018-09-30 10:19:25,350 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:19:25,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:19:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:19:25,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 10:19:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 10:19:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-30 10:19:25,356 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-30 10:19:25,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:25,356 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-30 10:19:25,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:19:25,356 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-30 10:19:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 10:19:25,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:25,357 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:25,357 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:25,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:25,357 INFO L82 PathProgramCache]: Analyzing trace with hash 674841144, now seen corresponding path program 38 times [2018-09-30 10:19:25,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:25,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:25,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:25,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:25,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:26,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:26,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:26,225 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:26,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:26,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:26,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:26,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:26,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 10:19:26,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:19:26,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:19:26,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:19:26,340 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 42 states. [2018-09-30 10:19:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:26,448 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2018-09-30 10:19:26,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:19:26,448 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2018-09-30 10:19:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:26,449 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:19:26,449 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:19:26,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:19:26,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:19:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 10:19:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:19:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-30 10:19:26,455 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2018-09-30 10:19:26,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:26,455 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-30 10:19:26,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:19:26,455 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-30 10:19:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:19:26,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:26,456 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:26,456 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:26,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:26,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1589111860, now seen corresponding path program 39 times [2018-09-30 10:19:26,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:26,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:26,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:26,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:26,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:27,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:27,221 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:27,227 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:27,370 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-30 10:19:27,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:27,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:27,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:27,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 10:19:27,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:19:27,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:19:27,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:19:27,428 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 43 states. [2018-09-30 10:19:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:27,635 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2018-09-30 10:19:27,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:19:27,636 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2018-09-30 10:19:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:27,637 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:19:27,637 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:19:27,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:19:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:19:27,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 10:19:27,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 10:19:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2018-09-30 10:19:27,644 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2018-09-30 10:19:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:27,645 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2018-09-30 10:19:27,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:19:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2018-09-30 10:19:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:19:27,646 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:27,646 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:27,646 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:27,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:27,646 INFO L82 PathProgramCache]: Analyzing trace with hash -265025744, now seen corresponding path program 40 times [2018-09-30 10:19:27,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:27,647 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:27,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:27,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:27,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:29,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:29,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:29,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:29,082 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:29,144 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:29,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:29,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:29,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:29,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 10:19:29,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:19:29,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:19:29,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:19:29,202 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2018-09-30 10:19:30,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:30,546 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2018-09-30 10:19:30,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:19:30,546 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2018-09-30 10:19:30,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:30,547 INFO L225 Difference]: With dead ends: 115 [2018-09-30 10:19:30,547 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:19:30,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:19:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:19:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:19:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:19:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-30 10:19:30,553 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-30 10:19:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:30,553 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-30 10:19:30,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:19:30,554 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-30 10:19:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:19:30,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:30,555 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:30,555 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:30,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash 320164652, now seen corresponding path program 41 times [2018-09-30 10:19:30,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:30,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:30,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:30,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:30,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:31,910 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:31,910 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:31,918 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:32,015 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 10:19:32,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:32,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:32,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:32,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 10:19:32,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:19:32,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:19:32,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:19:32,058 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 45 states. [2018-09-30 10:19:32,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:32,438 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2018-09-30 10:19:32,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:19:32,439 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2018-09-30 10:19:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:32,440 INFO L225 Difference]: With dead ends: 117 [2018-09-30 10:19:32,440 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 10:19:32,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:19:32,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 10:19:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 10:19:32,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 10:19:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-30 10:19:32,446 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2018-09-30 10:19:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:32,447 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-30 10:19:32,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:19:32,447 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-30 10:19:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 10:19:32,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:32,447 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:32,448 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:32,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:32,448 INFO L82 PathProgramCache]: Analyzing trace with hash 47419432, now seen corresponding path program 42 times [2018-09-30 10:19:32,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:32,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:32,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:32,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:32,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:33,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:33,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:33,507 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:33,608 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-30 10:19:33,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:33,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:33,647 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:33,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 10:19:33,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:19:33,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:19:33,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:19:33,649 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 46 states. [2018-09-30 10:19:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:33,821 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2018-09-30 10:19:33,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:19:33,830 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2018-09-30 10:19:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:33,831 INFO L225 Difference]: With dead ends: 119 [2018-09-30 10:19:33,831 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 10:19:33,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:19:33,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 10:19:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 10:19:33,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 10:19:33,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-30 10:19:33,836 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 102 [2018-09-30 10:19:33,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:33,837 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-30 10:19:33,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:19:33,837 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-30 10:19:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:19:33,837 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:33,838 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:33,838 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:33,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:33,838 INFO L82 PathProgramCache]: Analyzing trace with hash -67731932, now seen corresponding path program 43 times [2018-09-30 10:19:33,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:33,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:33,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:33,839 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:33,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:35,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:35,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:35,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:35,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:35,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:35,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 10:19:35,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:19:35,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:19:35,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:19:35,361 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-09-30 10:19:35,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:35,891 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-09-30 10:19:35,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:19:35,891 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-09-30 10:19:35,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:35,892 INFO L225 Difference]: With dead ends: 121 [2018-09-30 10:19:35,892 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 10:19:35,893 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:19:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 10:19:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 10:19:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 10:19:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2018-09-30 10:19:35,898 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 104 [2018-09-30 10:19:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:35,899 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2018-09-30 10:19:35,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:19:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2018-09-30 10:19:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 10:19:35,900 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:35,900 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:35,900 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:35,900 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:35,900 INFO L82 PathProgramCache]: Analyzing trace with hash 940956960, now seen corresponding path program 44 times [2018-09-30 10:19:35,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:35,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:35,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:35,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:35,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:37,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:37,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:37,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:37,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:37,410 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:37,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:37,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:37,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 10:19:37,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:19:37,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:19:37,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:19:37,454 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 48 states. [2018-09-30 10:19:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:37,605 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2018-09-30 10:19:37,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:19:37,606 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 106 [2018-09-30 10:19:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:37,607 INFO L225 Difference]: With dead ends: 123 [2018-09-30 10:19:37,607 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 10:19:37,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:19:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 10:19:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 10:19:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:19:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-30 10:19:37,614 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 106 [2018-09-30 10:19:37,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:37,615 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-30 10:19:37,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:19:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-30 10:19:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 10:19:37,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:37,616 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:37,616 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:37,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:37,616 INFO L82 PathProgramCache]: Analyzing trace with hash -371626724, now seen corresponding path program 45 times [2018-09-30 10:19:37,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:37,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:37,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:37,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:37,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:38,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:38,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:38,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:38,838 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-30 10:19:38,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:38,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:38,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:38,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 10:19:38,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:19:38,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:19:38,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:19:38,883 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 49 states. [2018-09-30 10:19:39,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:39,045 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2018-09-30 10:19:39,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:19:39,045 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 108 [2018-09-30 10:19:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:39,047 INFO L225 Difference]: With dead ends: 125 [2018-09-30 10:19:39,047 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 10:19:39,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:19:39,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 10:19:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 10:19:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 10:19:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-09-30 10:19:39,052 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 108 [2018-09-30 10:19:39,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:39,052 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-09-30 10:19:39,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:19:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-09-30 10:19:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:19:39,053 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:39,053 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:39,053 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:39,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash 955837976, now seen corresponding path program 46 times [2018-09-30 10:19:39,053 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:39,053 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:39,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:39,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:39,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:40,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:40,579 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:40,586 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:40,667 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:40,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:40,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:40,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:40,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:40,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 10:19:40,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:19:40,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:19:40,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:19:40,725 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 50 states. [2018-09-30 10:19:40,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:40,849 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2018-09-30 10:19:40,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:19:40,850 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 110 [2018-09-30 10:19:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:40,851 INFO L225 Difference]: With dead ends: 127 [2018-09-30 10:19:40,851 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 10:19:40,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:19:40,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 10:19:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 10:19:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 10:19:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-30 10:19:40,855 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-30 10:19:40,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:40,855 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-30 10:19:40,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:19:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-30 10:19:40,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 10:19:40,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:40,856 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:40,857 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:40,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:40,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1044127764, now seen corresponding path program 47 times [2018-09-30 10:19:40,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:40,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:40,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:40,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:40,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:42,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:42,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:42,146 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:42,252 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 10:19:42,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:42,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:42,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:42,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 10:19:42,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:19:42,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:19:42,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:19:42,309 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 51 states. [2018-09-30 10:19:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:42,538 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2018-09-30 10:19:42,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:19:42,541 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 112 [2018-09-30 10:19:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:42,542 INFO L225 Difference]: With dead ends: 129 [2018-09-30 10:19:42,542 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 10:19:42,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:19:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 10:19:42,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 10:19:42,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 10:19:42,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-30 10:19:42,548 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2018-09-30 10:19:42,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:42,549 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-30 10:19:42,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:19:42,549 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-30 10:19:42,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 10:19:42,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:42,550 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:42,550 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:42,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:42,550 INFO L82 PathProgramCache]: Analyzing trace with hash -8731888, now seen corresponding path program 48 times [2018-09-30 10:19:42,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:42,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:42,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:42,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:42,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:43,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:43,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:43,536 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:43,658 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-30 10:19:43,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:43,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:43,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:43,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 10:19:43,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:19:43,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:19:43,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:19:43,702 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 52 states. [2018-09-30 10:19:43,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:43,875 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2018-09-30 10:19:43,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:19:43,876 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 114 [2018-09-30 10:19:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:43,877 INFO L225 Difference]: With dead ends: 131 [2018-09-30 10:19:43,877 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 10:19:43,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:19:43,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 10:19:43,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 10:19:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 10:19:43,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2018-09-30 10:19:43,883 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 114 [2018-09-30 10:19:43,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:43,883 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2018-09-30 10:19:43,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:19:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2018-09-30 10:19:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 10:19:43,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:43,884 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:43,884 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:43,884 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:43,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1805424396, now seen corresponding path program 49 times [2018-09-30 10:19:43,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:43,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:43,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:43,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:43,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:43,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:45,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:45,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:45,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:45,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:45,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:45,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:45,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 10:19:45,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:19:45,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:19:45,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:19:45,374 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 53 states. [2018-09-30 10:19:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:45,587 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2018-09-30 10:19:45,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:19:45,587 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 116 [2018-09-30 10:19:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:45,588 INFO L225 Difference]: With dead ends: 133 [2018-09-30 10:19:45,588 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 10:19:45,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:19:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 10:19:45,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 10:19:45,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 10:19:45,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-30 10:19:45,597 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-30 10:19:45,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:45,597 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-30 10:19:45,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:19:45,597 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-30 10:19:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 10:19:45,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:45,598 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:45,598 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:45,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:45,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1452891144, now seen corresponding path program 50 times [2018-09-30 10:19:45,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:45,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:45,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:45,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:45,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:46,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:46,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:46,734 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:46,811 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:46,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:46,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:46,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:46,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 10:19:46,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:19:46,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:19:46,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:19:46,877 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 54 states. [2018-09-30 10:19:47,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:47,170 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-09-30 10:19:47,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:19:47,171 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 118 [2018-09-30 10:19:47,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:47,172 INFO L225 Difference]: With dead ends: 135 [2018-09-30 10:19:47,172 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 10:19:47,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:19:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 10:19:47,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 10:19:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 10:19:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-30 10:19:47,177 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 118 [2018-09-30 10:19:47,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:47,177 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-30 10:19:47,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:19:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-30 10:19:47,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 10:19:47,178 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:47,178 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:47,178 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:47,178 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:47,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1970852356, now seen corresponding path program 51 times [2018-09-30 10:19:47,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:47,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:47,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:47,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:47,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:48,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:48,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:48,243 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:48,375 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-30 10:19:48,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:48,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:48,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:48,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 10:19:48,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:19:48,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:19:48,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:19:48,437 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 55 states. [2018-09-30 10:19:48,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:48,577 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2018-09-30 10:19:48,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:19:48,578 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 120 [2018-09-30 10:19:48,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:48,579 INFO L225 Difference]: With dead ends: 137 [2018-09-30 10:19:48,579 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 10:19:48,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:19:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 10:19:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 10:19:48,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 10:19:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2018-09-30 10:19:48,589 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 120 [2018-09-30 10:19:48,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:48,589 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2018-09-30 10:19:48,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:19:48,589 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2018-09-30 10:19:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 10:19:48,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:48,590 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:48,590 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:48,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:48,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1515370752, now seen corresponding path program 52 times [2018-09-30 10:19:48,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:48,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:48,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:48,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:48,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:49,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:49,744 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:49,751 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:19:49,830 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:19:49,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:49,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:49,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:49,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:49,891 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 10:19:49,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:19:49,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:19:49,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:19:49,892 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 56 states. [2018-09-30 10:19:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:50,009 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-09-30 10:19:50,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:19:50,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 122 [2018-09-30 10:19:50,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:50,010 INFO L225 Difference]: With dead ends: 139 [2018-09-30 10:19:50,010 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 10:19:50,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:19:50,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 10:19:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 10:19:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 10:19:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-09-30 10:19:50,016 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2018-09-30 10:19:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:50,016 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-09-30 10:19:50,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:19:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-09-30 10:19:50,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 10:19:50,017 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:50,017 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:50,017 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:50,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1884213500, now seen corresponding path program 53 times [2018-09-30 10:19:50,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:50,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:50,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:50,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:50,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:51,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:51,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:51,420 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:19:51,598 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 10:19:51,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:51,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:51,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:51,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 10:19:51,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:19:51,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:19:51,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:19:51,657 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 57 states. [2018-09-30 10:19:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:51,834 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2018-09-30 10:19:51,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:19:51,835 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 124 [2018-09-30 10:19:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:51,836 INFO L225 Difference]: With dead ends: 141 [2018-09-30 10:19:51,836 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 10:19:51,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:19:51,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 10:19:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 10:19:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 10:19:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-30 10:19:51,840 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2018-09-30 10:19:51,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:51,840 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-30 10:19:51,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:19:51,840 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-30 10:19:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 10:19:51,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:51,841 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:51,841 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:51,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash -140191240, now seen corresponding path program 54 times [2018-09-30 10:19:51,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:51,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:51,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:51,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:51,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:53,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:53,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:53,179 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:19:53,317 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-30 10:19:53,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:53,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:53,377 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:53,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 10:19:53,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:19:53,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:19:53,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:19:53,378 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 58 states. [2018-09-30 10:19:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:53,603 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2018-09-30 10:19:53,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:19:53,603 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 126 [2018-09-30 10:19:53,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:53,604 INFO L225 Difference]: With dead ends: 143 [2018-09-30 10:19:53,604 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 10:19:53,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:19:53,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 10:19:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 10:19:53,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 10:19:53,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-09-30 10:19:53,610 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 126 [2018-09-30 10:19:53,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:53,610 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-09-30 10:19:53,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:19:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-09-30 10:19:53,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 10:19:53,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:53,611 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:53,611 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:53,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:53,611 INFO L82 PathProgramCache]: Analyzing trace with hash 27038708, now seen corresponding path program 55 times [2018-09-30 10:19:53,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:53,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:53,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:53,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:53,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:54,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:54,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:54,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:54,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:54,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:54,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:54,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 10:19:54,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:19:54,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:19:54,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:19:54,964 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-09-30 10:19:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:55,189 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2018-09-30 10:19:55,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:19:55,189 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-09-30 10:19:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:55,190 INFO L225 Difference]: With dead ends: 145 [2018-09-30 10:19:55,190 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 10:19:55,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:19:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 10:19:55,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 10:19:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 10:19:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-30 10:19:55,195 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-30 10:19:55,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:55,195 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-30 10:19:55,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:19:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-30 10:19:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 10:19:55,196 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:55,196 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:55,196 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:55,196 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:55,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1821228784, now seen corresponding path program 56 times [2018-09-30 10:19:55,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:55,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:55,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:55,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:19:55,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:56,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:56,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:56,622 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:19:56,703 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:19:56,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:56,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:56,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:56,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 10:19:56,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:19:56,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:19:56,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:19:56,765 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 60 states. [2018-09-30 10:19:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:57,075 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2018-09-30 10:19:57,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:19:57,076 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 130 [2018-09-30 10:19:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:57,077 INFO L225 Difference]: With dead ends: 147 [2018-09-30 10:19:57,077 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 10:19:57,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:19:57,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 10:19:57,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 10:19:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 10:19:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-30 10:19:57,082 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 130 [2018-09-30 10:19:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:57,082 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-30 10:19:57,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:19:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-30 10:19:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 10:19:57,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:57,083 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:57,083 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:57,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:57,084 INFO L82 PathProgramCache]: Analyzing trace with hash -538961172, now seen corresponding path program 57 times [2018-09-30 10:19:57,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:57,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:57,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:57,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:57,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:19:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:58,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:19:58,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:19:58,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:19:58,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-30 10:19:58,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:19:58,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:19:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:19:58,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:19:58,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 10:19:58,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:19:58,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:19:58,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:19:58,597 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 61 states. [2018-09-30 10:19:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:19:58,709 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2018-09-30 10:19:58,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:19:58,709 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 132 [2018-09-30 10:19:58,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:19:58,710 INFO L225 Difference]: With dead ends: 149 [2018-09-30 10:19:58,710 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 10:19:58,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:19:58,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 10:19:58,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 10:19:58,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 10:19:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-09-30 10:19:58,717 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 132 [2018-09-30 10:19:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:19:58,717 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-09-30 10:19:58,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:19:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-09-30 10:19:58,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 10:19:58,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:19:58,718 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:19:58,719 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:19:58,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:19:58,719 INFO L82 PathProgramCache]: Analyzing trace with hash -938776600, now seen corresponding path program 58 times [2018-09-30 10:19:58,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:19:58,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:19:58,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:58,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:19:58,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:19:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:00,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:00,340 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:00,348 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:20:00,427 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:20:00,428 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:00,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:00,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:00,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 10:20:00,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:20:00,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:20:00,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:20:00,480 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 62 states. [2018-09-30 10:20:00,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:00,700 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2018-09-30 10:20:00,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:20:00,700 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 134 [2018-09-30 10:20:00,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:00,701 INFO L225 Difference]: With dead ends: 151 [2018-09-30 10:20:00,701 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 10:20:00,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:20:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 10:20:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 10:20:00,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 10:20:00,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-30 10:20:00,707 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-30 10:20:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:00,707 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-30 10:20:00,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:20:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-30 10:20:00,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 10:20:00,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:00,708 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:00,708 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:00,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:00,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1385653732, now seen corresponding path program 59 times [2018-09-30 10:20:00,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:00,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:00,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:00,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:00,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:02,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:02,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:02,096 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:20:02,246 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 10:20:02,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:02,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:02,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:02,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 10:20:02,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:20:02,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:20:02,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:20:02,312 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 63 states. [2018-09-30 10:20:03,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:03,170 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2018-09-30 10:20:03,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:20:03,171 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 136 [2018-09-30 10:20:03,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:03,172 INFO L225 Difference]: With dead ends: 153 [2018-09-30 10:20:03,172 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 10:20:03,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:20:03,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 10:20:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 10:20:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 10:20:03,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-30 10:20:03,179 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 136 [2018-09-30 10:20:03,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:03,179 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-30 10:20:03,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:20:03,180 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-30 10:20:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 10:20:03,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:03,180 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:03,180 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:03,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:03,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1780208864, now seen corresponding path program 60 times [2018-09-30 10:20:03,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:03,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:03,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:03,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:03,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:04,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:04,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:04,635 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:20:04,792 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-30 10:20:04,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:04,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:04,844 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:04,845 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 10:20:04,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:20:04,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:20:04,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:20:04,846 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 64 states. [2018-09-30 10:20:04,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:04,972 INFO L93 Difference]: Finished difference Result 155 states and 159 transitions. [2018-09-30 10:20:04,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:20:04,973 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 138 [2018-09-30 10:20:04,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:04,974 INFO L225 Difference]: With dead ends: 155 [2018-09-30 10:20:04,974 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 10:20:04,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:20:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 10:20:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 10:20:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 10:20:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-09-30 10:20:04,980 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 138 [2018-09-30 10:20:04,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:04,980 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-09-30 10:20:04,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:20:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-09-30 10:20:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 10:20:04,981 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:04,981 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:04,982 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:04,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:04,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1304398628, now seen corresponding path program 61 times [2018-09-30 10:20:04,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:04,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:04,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:04,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:04,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:06,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:06,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:06,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:06,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:06,816 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:06,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 10:20:06,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:20:06,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:20:06,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:20:06,818 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 65 states. [2018-09-30 10:20:07,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:07,014 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-09-30 10:20:07,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:20:07,015 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 140 [2018-09-30 10:20:07,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:07,016 INFO L225 Difference]: With dead ends: 157 [2018-09-30 10:20:07,016 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 10:20:07,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:20:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 10:20:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 10:20:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 10:20:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-30 10:20:07,020 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-30 10:20:07,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:07,021 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-30 10:20:07,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:20:07,021 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-30 10:20:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 10:20:07,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:07,022 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:07,022 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:07,022 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:07,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2084764200, now seen corresponding path program 62 times [2018-09-30 10:20:07,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:07,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:07,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:07,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:07,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:08,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:08,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:08,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:08,713 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:08,713 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:08,716 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:08,759 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:08,760 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 10:20:08,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:20:08,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:20:08,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:20:08,761 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 66 states. [2018-09-30 10:20:09,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:09,340 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2018-09-30 10:20:09,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:20:09,341 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 142 [2018-09-30 10:20:09,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:09,342 INFO L225 Difference]: With dead ends: 159 [2018-09-30 10:20:09,342 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 10:20:09,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:20:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 10:20:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 10:20:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 10:20:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-30 10:20:09,349 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 142 [2018-09-30 10:20:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:09,349 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-30 10:20:09,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:20:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-30 10:20:09,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 10:20:09,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:09,350 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:09,351 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:09,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:09,351 INFO L82 PathProgramCache]: Analyzing trace with hash -396802092, now seen corresponding path program 63 times [2018-09-30 10:20:09,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:09,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:09,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:09,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:09,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:11,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:11,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:11,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:20:11,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-30 10:20:11,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:11,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:11,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:11,619 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 10:20:11,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:20:11,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:20:11,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:20:11,620 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 67 states. [2018-09-30 10:20:11,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:11,820 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2018-09-30 10:20:11,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:20:11,821 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 144 [2018-09-30 10:20:11,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:11,822 INFO L225 Difference]: With dead ends: 161 [2018-09-30 10:20:11,822 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 10:20:11,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:20:11,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 10:20:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 10:20:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 10:20:11,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-09-30 10:20:11,828 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 144 [2018-09-30 10:20:11,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:11,828 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-09-30 10:20:11,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:20:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-09-30 10:20:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 10:20:11,829 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:11,829 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:11,829 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:11,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:11,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1762854192, now seen corresponding path program 64 times [2018-09-30 10:20:11,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:11,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:11,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:11,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:11,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:13,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:13,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:13,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:20:13,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:20:13,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:13,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:13,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:13,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 10:20:13,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:20:13,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:20:13,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:20:13,604 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 68 states. [2018-09-30 10:20:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:13,880 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2018-09-30 10:20:13,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:20:13,881 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 146 [2018-09-30 10:20:13,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:13,882 INFO L225 Difference]: With dead ends: 163 [2018-09-30 10:20:13,882 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 10:20:13,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:20:13,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 10:20:13,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 10:20:13,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 10:20:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-30 10:20:13,889 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-30 10:20:13,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:13,890 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-30 10:20:13,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:20:13,890 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-30 10:20:13,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 10:20:13,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:13,891 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:13,891 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:13,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:13,891 INFO L82 PathProgramCache]: Analyzing trace with hash -278929716, now seen corresponding path program 65 times [2018-09-30 10:20:13,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:13,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:13,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:13,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:13,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:13,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:15,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:15,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:15,905 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:20:16,080 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 10:20:16,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:16,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:16,141 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:16,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 10:20:16,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:20:16,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:20:16,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:20:16,143 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 69 states. [2018-09-30 10:20:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:16,346 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2018-09-30 10:20:16,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:20:16,347 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 148 [2018-09-30 10:20:16,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:16,348 INFO L225 Difference]: With dead ends: 165 [2018-09-30 10:20:16,348 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 10:20:16,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:20:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 10:20:16,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 10:20:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 10:20:16,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-30 10:20:16,356 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 148 [2018-09-30 10:20:16,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:16,357 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-30 10:20:16,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:20:16,357 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-30 10:20:16,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 10:20:16,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:16,358 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:16,358 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:16,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:16,358 INFO L82 PathProgramCache]: Analyzing trace with hash -156650552, now seen corresponding path program 66 times [2018-09-30 10:20:16,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:16,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:16,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:16,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:16,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:18,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:18,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:18,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:18,124 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:20:18,303 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-30 10:20:18,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:18,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:18,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:18,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 10:20:18,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:20:18,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:20:18,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:20:18,361 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 70 states. [2018-09-30 10:20:18,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:18,578 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2018-09-30 10:20:18,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:20:18,579 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 150 [2018-09-30 10:20:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:18,580 INFO L225 Difference]: With dead ends: 167 [2018-09-30 10:20:18,580 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 10:20:18,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:20:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 10:20:18,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 10:20:18,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 10:20:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2018-09-30 10:20:18,585 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2018-09-30 10:20:18,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:18,585 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2018-09-30 10:20:18,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:20:18,585 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2018-09-30 10:20:18,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 10:20:18,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:18,586 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:18,586 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:18,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:18,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1389509060, now seen corresponding path program 67 times [2018-09-30 10:20:18,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:18,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:18,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:18,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:18,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:20,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:20,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:20,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:20,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:20,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:20,641 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 10:20:20,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:20:20,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:20:20,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:20:20,642 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 71 states. [2018-09-30 10:20:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:20,936 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2018-09-30 10:20:20,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:20:20,937 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 152 [2018-09-30 10:20:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:20,938 INFO L225 Difference]: With dead ends: 169 [2018-09-30 10:20:20,938 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 10:20:20,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:20:20,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 10:20:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 10:20:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 10:20:20,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-30 10:20:20,944 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-30 10:20:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:20,944 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-30 10:20:20,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:20:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-30 10:20:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 10:20:20,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:20,945 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:20,945 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:20,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:20,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1190211776, now seen corresponding path program 68 times [2018-09-30 10:20:20,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:20,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:20,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:20,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:20,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:22,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:22,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:22,785 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:22,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:22,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:22,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:22,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:22,950 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:22,950 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 10:20:22,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:20:22,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:20:22,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:20:22,952 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 72 states. [2018-09-30 10:20:23,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:23,562 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2018-09-30 10:20:23,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:20:23,562 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 154 [2018-09-30 10:20:23,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:23,563 INFO L225 Difference]: With dead ends: 171 [2018-09-30 10:20:23,563 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 10:20:23,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:20:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 10:20:23,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 10:20:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 10:20:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-30 10:20:23,568 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 154 [2018-09-30 10:20:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:23,568 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-30 10:20:23,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:20:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-30 10:20:23,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 10:20:23,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:23,569 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:23,570 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:23,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:23,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1355917124, now seen corresponding path program 69 times [2018-09-30 10:20:23,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:23,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:23,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:23,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:23,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:25,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:25,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:25,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:25,464 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:20:25,662 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-30 10:20:25,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:25,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:25,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:25,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 10:20:25,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:20:25,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:20:25,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:20:25,722 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 73 states. [2018-09-30 10:20:25,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:25,898 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2018-09-30 10:20:25,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:20:25,898 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 156 [2018-09-30 10:20:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:25,899 INFO L225 Difference]: With dead ends: 173 [2018-09-30 10:20:25,899 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 10:20:25,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:20:25,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 10:20:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 10:20:25,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 10:20:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2018-09-30 10:20:25,906 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 156 [2018-09-30 10:20:25,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:25,906 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2018-09-30 10:20:25,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:20:25,906 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2018-09-30 10:20:25,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 10:20:25,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:25,907 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:25,907 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:25,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:25,907 INFO L82 PathProgramCache]: Analyzing trace with hash -54431304, now seen corresponding path program 70 times [2018-09-30 10:20:25,907 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:25,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:25,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:25,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:25,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:27,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:27,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:27,952 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:20:28,055 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:20:28,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:28,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:28,123 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:28,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 10:20:28,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:20:28,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:20:28,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:20:28,125 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 74 states. [2018-09-30 10:20:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:28,385 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-09-30 10:20:28,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:20:28,386 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 158 [2018-09-30 10:20:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:28,387 INFO L225 Difference]: With dead ends: 175 [2018-09-30 10:20:28,388 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 10:20:28,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:20:28,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 10:20:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 10:20:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 10:20:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-30 10:20:28,395 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 158 [2018-09-30 10:20:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:28,395 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-30 10:20:28,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:20:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-30 10:20:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 10:20:28,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:28,396 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:28,397 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:28,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash 837958580, now seen corresponding path program 71 times [2018-09-30 10:20:28,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:28,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:28,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:28,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:28,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:30,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:30,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:30,472 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:20:30,663 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 10:20:30,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:30,667 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:30,715 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:30,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 10:20:30,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:20:30,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:20:30,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:20:30,717 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 75 states. [2018-09-30 10:20:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:30,881 INFO L93 Difference]: Finished difference Result 177 states and 181 transitions. [2018-09-30 10:20:30,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:20:30,882 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 160 [2018-09-30 10:20:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:30,883 INFO L225 Difference]: With dead ends: 177 [2018-09-30 10:20:30,883 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 10:20:30,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:20:30,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 10:20:30,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 10:20:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 10:20:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-30 10:20:30,890 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 160 [2018-09-30 10:20:30,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:30,891 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-30 10:20:30,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:20:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-30 10:20:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 10:20:30,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:30,892 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:30,892 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:30,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash -568822096, now seen corresponding path program 72 times [2018-09-30 10:20:30,892 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:30,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:30,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:30,893 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:30,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:33,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:33,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:33,178 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:20:33,390 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-09-30 10:20:33,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:33,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:33,441 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:33,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 10:20:33,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:20:33,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:20:33,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:20:33,442 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 76 states. [2018-09-30 10:20:33,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:33,692 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2018-09-30 10:20:33,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:20:33,692 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 162 [2018-09-30 10:20:33,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:33,693 INFO L225 Difference]: With dead ends: 179 [2018-09-30 10:20:33,693 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 10:20:33,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:20:33,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 10:20:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 10:20:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 10:20:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-09-30 10:20:33,699 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 162 [2018-09-30 10:20:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:33,699 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-09-30 10:20:33,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:20:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-09-30 10:20:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 10:20:33,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:33,700 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:33,700 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:33,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:33,701 INFO L82 PathProgramCache]: Analyzing trace with hash 429646508, now seen corresponding path program 73 times [2018-09-30 10:20:33,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:33,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:33,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:33,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:33,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:35,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:35,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:35,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:35,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:35,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:36,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 10:20:36,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:20:36,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:20:36,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:20:36,001 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 77 states. [2018-09-30 10:20:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:36,269 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2018-09-30 10:20:36,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:20:36,270 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 164 [2018-09-30 10:20:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:36,270 INFO L225 Difference]: With dead ends: 181 [2018-09-30 10:20:36,271 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 10:20:36,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:20:36,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 10:20:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 10:20:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 10:20:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-30 10:20:36,277 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-30 10:20:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:36,277 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-30 10:20:36,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:20:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-30 10:20:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 10:20:36,278 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:36,278 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:36,278 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:36,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:36,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2114699352, now seen corresponding path program 74 times [2018-09-30 10:20:36,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:36,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:36,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:36,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:36,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:38,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:38,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:38,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:38,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:38,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:38,540 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:38,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:38,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 10:20:38,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:20:38,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:20:38,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:20:38,599 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 78 states. [2018-09-30 10:20:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:38,765 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2018-09-30 10:20:38,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:20:38,765 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 166 [2018-09-30 10:20:38,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:38,766 INFO L225 Difference]: With dead ends: 183 [2018-09-30 10:20:38,766 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 10:20:38,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:20:38,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 10:20:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 10:20:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 10:20:38,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-30 10:20:38,772 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 166 [2018-09-30 10:20:38,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:38,772 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-30 10:20:38,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:20:38,773 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-30 10:20:38,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 10:20:38,773 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:38,773 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:38,774 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:38,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:38,774 INFO L82 PathProgramCache]: Analyzing trace with hash 900287908, now seen corresponding path program 75 times [2018-09-30 10:20:38,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:38,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:38,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:38,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:38,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:40,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:40,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:41,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:20:41,253 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2018-09-30 10:20:41,253 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:41,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:41,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:41,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:41,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 10:20:41,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:20:41,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:20:41,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:20:41,316 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 79 states. [2018-09-30 10:20:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:41,508 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2018-09-30 10:20:41,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:20:41,508 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 168 [2018-09-30 10:20:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:41,509 INFO L225 Difference]: With dead ends: 185 [2018-09-30 10:20:41,509 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 10:20:41,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:20:41,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 10:20:41,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 10:20:41,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 10:20:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-30 10:20:41,516 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 168 [2018-09-30 10:20:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:41,516 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-30 10:20:41,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 10:20:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-30 10:20:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 10:20:41,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:41,517 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:41,517 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:41,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash -799880032, now seen corresponding path program 76 times [2018-09-30 10:20:41,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:41,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:41,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:41,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:41,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:43,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:43,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:43,794 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:20:43,905 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:20:43,906 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:43,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:43,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:43,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 10:20:43,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:20:43,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:20:43,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:20:43,962 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 80 states. [2018-09-30 10:20:44,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:44,141 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2018-09-30 10:20:44,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:20:44,141 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 170 [2018-09-30 10:20:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:44,143 INFO L225 Difference]: With dead ends: 187 [2018-09-30 10:20:44,143 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 10:20:44,143 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:20:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 10:20:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 10:20:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 10:20:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-30 10:20:44,149 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-30 10:20:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:44,150 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-30 10:20:44,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:20:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-30 10:20:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 10:20:44,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:44,150 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:44,151 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:44,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:44,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1721269404, now seen corresponding path program 77 times [2018-09-30 10:20:44,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:44,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:44,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:44,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:44,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:46,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:46,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:46,866 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:20:47,090 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-30 10:20:47,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:47,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:47,145 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:47,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 10:20:47,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 10:20:47,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 10:20:47,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:20:47,146 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 81 states. [2018-09-30 10:20:47,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:47,334 INFO L93 Difference]: Finished difference Result 189 states and 193 transitions. [2018-09-30 10:20:47,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:20:47,335 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 172 [2018-09-30 10:20:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:47,336 INFO L225 Difference]: With dead ends: 189 [2018-09-30 10:20:47,336 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 10:20:47,337 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:20:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 10:20:47,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 10:20:47,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 10:20:47,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-30 10:20:47,344 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 172 [2018-09-30 10:20:47,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:47,344 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-30 10:20:47,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 10:20:47,345 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-30 10:20:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 10:20:47,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:47,346 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:47,346 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:47,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:47,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2110644840, now seen corresponding path program 78 times [2018-09-30 10:20:47,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:47,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:47,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:47,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:47,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:49,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:49,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:49,788 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:20:50,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2018-09-30 10:20:50,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:50,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:50,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:50,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 10:20:50,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:20:50,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:20:50,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:20:50,082 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 82 states. [2018-09-30 10:20:50,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:50,393 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2018-09-30 10:20:50,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:20:50,394 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 174 [2018-09-30 10:20:50,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:50,395 INFO L225 Difference]: With dead ends: 191 [2018-09-30 10:20:50,395 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 10:20:50,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:20:50,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 10:20:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 10:20:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 10:20:50,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2018-09-30 10:20:50,400 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 174 [2018-09-30 10:20:50,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:50,401 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2018-09-30 10:20:50,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:20:50,401 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2018-09-30 10:20:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 10:20:50,401 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:50,402 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:50,402 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:50,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:50,402 INFO L82 PathProgramCache]: Analyzing trace with hash 501706644, now seen corresponding path program 79 times [2018-09-30 10:20:50,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:50,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:50,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:50,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:50,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:53,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:53,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:53,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:53,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:53,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:53,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 10:20:53,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 10:20:53,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 10:20:53,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:20:53,390 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 83 states. [2018-09-30 10:20:53,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:53,595 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-09-30 10:20:53,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:20:53,596 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 176 [2018-09-30 10:20:53,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:53,597 INFO L225 Difference]: With dead ends: 193 [2018-09-30 10:20:53,597 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 10:20:53,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:20:53,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 10:20:53,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 10:20:53,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 10:20:53,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2018-09-30 10:20:53,603 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2018-09-30 10:20:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:53,603 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2018-09-30 10:20:53,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 10:20:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2018-09-30 10:20:53,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 10:20:53,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:53,604 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:53,605 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:53,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:53,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1584385392, now seen corresponding path program 80 times [2018-09-30 10:20:53,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:53,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:53,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:53,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:20:53,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:56,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:56,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:56,100 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:20:56,214 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:20:56,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:56,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:56,290 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:56,290 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 10:20:56,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:20:56,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:20:56,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:20:56,291 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 84 states. [2018-09-30 10:20:56,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:56,689 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-09-30 10:20:56,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 10:20:56,690 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 178 [2018-09-30 10:20:56,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:56,691 INFO L225 Difference]: With dead ends: 195 [2018-09-30 10:20:56,691 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 10:20:56,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:20:56,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 10:20:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 10:20:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 10:20:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-30 10:20:56,699 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2018-09-30 10:20:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:56,699 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-30 10:20:56,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:20:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-30 10:20:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 10:20:56,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:56,700 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:56,700 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:56,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:56,700 INFO L82 PathProgramCache]: Analyzing trace with hash -569104756, now seen corresponding path program 81 times [2018-09-30 10:20:56,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:56,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:56,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:56,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:56,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:20:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:59,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:20:59,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:20:59,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:20:59,542 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-09-30 10:20:59,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:20:59,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:20:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:20:59,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:20:59,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 10:20:59,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 10:20:59,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 10:20:59,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 10:20:59,620 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 85 states. [2018-09-30 10:20:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:20:59,813 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2018-09-30 10:20:59,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 10:20:59,814 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 180 [2018-09-30 10:20:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:20:59,815 INFO L225 Difference]: With dead ends: 197 [2018-09-30 10:20:59,815 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 10:20:59,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 10:20:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 10:20:59,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 10:20:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 10:20:59,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2018-09-30 10:20:59,822 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 180 [2018-09-30 10:20:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:20:59,822 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2018-09-30 10:20:59,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 10:20:59,822 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2018-09-30 10:20:59,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 10:20:59,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:20:59,824 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:20:59,824 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:20:59,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:20:59,824 INFO L82 PathProgramCache]: Analyzing trace with hash 158010248, now seen corresponding path program 82 times [2018-09-30 10:20:59,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:20:59,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:20:59,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:59,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:20:59,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:20:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:02,666 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:02,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:02,674 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:21:02,794 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:21:02,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:02,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:02,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:02,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 10:21:02,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:21:02,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:21:02,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:21:02,853 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 86 states. [2018-09-30 10:21:03,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:03,076 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2018-09-30 10:21:03,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 10:21:03,077 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 182 [2018-09-30 10:21:03,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:03,078 INFO L225 Difference]: With dead ends: 199 [2018-09-30 10:21:03,078 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 10:21:03,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:21:03,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 10:21:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 10:21:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 10:21:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-30 10:21:03,085 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-30 10:21:03,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:03,085 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-30 10:21:03,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:21:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-30 10:21:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 10:21:03,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:03,087 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:03,087 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:03,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1164140156, now seen corresponding path program 83 times [2018-09-30 10:21:03,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:03,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:03,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:03,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:03,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:05,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:05,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:05,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:05,861 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:21:06,121 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-30 10:21:06,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:06,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:06,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:06,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 10:21:06,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 10:21:06,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 10:21:06,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:21:06,183 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 87 states. [2018-09-30 10:21:06,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:06,525 INFO L93 Difference]: Finished difference Result 201 states and 205 transitions. [2018-09-30 10:21:06,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 10:21:06,526 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 184 [2018-09-30 10:21:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:06,526 INFO L225 Difference]: With dead ends: 201 [2018-09-30 10:21:06,527 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 10:21:06,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:21:06,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 10:21:06,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 10:21:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 10:21:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-30 10:21:06,535 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 184 [2018-09-30 10:21:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:06,535 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-30 10:21:06,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 10:21:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-30 10:21:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 10:21:06,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:06,537 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:06,537 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:06,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:06,537 INFO L82 PathProgramCache]: Analyzing trace with hash -440358784, now seen corresponding path program 84 times [2018-09-30 10:21:06,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:06,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:06,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:06,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:06,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:09,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:09,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:09,464 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:21:09,717 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-30 10:21:09,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:09,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:09,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:09,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 10:21:09,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:21:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:21:09,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:21:09,775 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 88 states. [2018-09-30 10:21:10,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:10,053 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2018-09-30 10:21:10,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 10:21:10,054 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 186 [2018-09-30 10:21:10,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:10,055 INFO L225 Difference]: With dead ends: 203 [2018-09-30 10:21:10,055 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 10:21:10,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:21:10,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 10:21:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 10:21:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 10:21:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-09-30 10:21:10,064 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 186 [2018-09-30 10:21:10,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:10,064 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-09-30 10:21:10,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:21:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-09-30 10:21:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 10:21:10,065 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:10,065 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:10,065 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:10,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:10,066 INFO L82 PathProgramCache]: Analyzing trace with hash -671162244, now seen corresponding path program 85 times [2018-09-30 10:21:10,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:10,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:10,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:10,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:10,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:13,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:13,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:13,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:13,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:21:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:13,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:13,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:13,311 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 10:21:13,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 10:21:13,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 10:21:13,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:21:13,313 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 89 states. [2018-09-30 10:21:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:13,560 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2018-09-30 10:21:13,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:21:13,560 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 188 [2018-09-30 10:21:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:13,561 INFO L225 Difference]: With dead ends: 205 [2018-09-30 10:21:13,561 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 10:21:13,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:21:13,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 10:21:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 10:21:13,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 10:21:13,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-30 10:21:13,569 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-30 10:21:13,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:13,570 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-30 10:21:13,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 10:21:13,570 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-30 10:21:13,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 10:21:13,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:13,571 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:13,571 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:13,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:13,571 INFO L82 PathProgramCache]: Analyzing trace with hash 865012088, now seen corresponding path program 86 times [2018-09-30 10:21:13,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:13,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:13,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:13,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:21:13,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:16,462 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:16,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:16,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:21:16,600 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:21:16,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:16,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:16,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:16,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 10:21:16,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:21:16,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:21:16,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:21:16,663 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 90 states. [2018-09-30 10:21:16,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:16,838 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2018-09-30 10:21:16,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 10:21:16,838 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 190 [2018-09-30 10:21:16,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:16,839 INFO L225 Difference]: With dead ends: 207 [2018-09-30 10:21:16,840 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 10:21:16,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:21:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 10:21:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 10:21:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 10:21:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-30 10:21:16,845 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 190 [2018-09-30 10:21:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:16,846 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-30 10:21:16,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:21:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-30 10:21:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 10:21:16,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:16,847 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:16,847 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:16,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:16,847 INFO L82 PathProgramCache]: Analyzing trace with hash -340204684, now seen corresponding path program 87 times [2018-09-30 10:21:16,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:16,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:16,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:16,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:16,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:19,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:19,879 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:19,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:21:20,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2018-09-30 10:21:20,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:20,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:20,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:20,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 10:21:20,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 10:21:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 10:21:20,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:21:20,228 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 91 states. [2018-09-30 10:21:20,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:20,533 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2018-09-30 10:21:20,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 10:21:20,534 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 192 [2018-09-30 10:21:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:20,535 INFO L225 Difference]: With dead ends: 209 [2018-09-30 10:21:20,535 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 10:21:20,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:21:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 10:21:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 10:21:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 10:21:20,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-09-30 10:21:20,542 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 192 [2018-09-30 10:21:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:20,542 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-09-30 10:21:20,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 10:21:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-09-30 10:21:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 10:21:20,542 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:20,543 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:20,543 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:20,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:20,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1087647344, now seen corresponding path program 88 times [2018-09-30 10:21:20,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:20,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:20,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:20,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:20,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:24,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:24,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:24,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:24,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:21:24,145 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:21:24,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:24,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:24,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:24,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 10:21:24,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:21:24,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:21:24,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:21:24,206 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 92 states. [2018-09-30 10:21:24,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:24,445 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-09-30 10:21:24,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 10:21:24,445 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 194 [2018-09-30 10:21:24,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:24,447 INFO L225 Difference]: With dead ends: 211 [2018-09-30 10:21:24,447 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 10:21:24,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:21:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 10:21:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 10:21:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 10:21:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2018-09-30 10:21:24,456 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 194 [2018-09-30 10:21:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:24,456 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2018-09-30 10:21:24,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:21:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2018-09-30 10:21:24,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 10:21:24,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:24,457 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:24,458 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:24,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1136088468, now seen corresponding path program 89 times [2018-09-30 10:21:24,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:24,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:24,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:24,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:24,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:27,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:27,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:27,871 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:21:28,146 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2018-09-30 10:21:28,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:28,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:28,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:28,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 10:21:28,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 10:21:28,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 10:21:28,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 10:21:28,210 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 93 states. [2018-09-30 10:21:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:28,543 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2018-09-30 10:21:28,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 10:21:28,543 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 196 [2018-09-30 10:21:28,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:28,544 INFO L225 Difference]: With dead ends: 213 [2018-09-30 10:21:28,544 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 10:21:28,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 10:21:28,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 10:21:28,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 10:21:28,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 10:21:28,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-30 10:21:28,552 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 196 [2018-09-30 10:21:28,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:28,552 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-30 10:21:28,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 10:21:28,552 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-30 10:21:28,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 10:21:28,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:28,553 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:28,553 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:28,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:28,553 INFO L82 PathProgramCache]: Analyzing trace with hash 747509608, now seen corresponding path program 90 times [2018-09-30 10:21:28,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:28,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:28,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:28,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:28,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:31,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:31,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:31,670 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:21:31,984 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2018-09-30 10:21:31,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:31,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:32,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:32,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:32,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 10:21:32,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:21:32,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:21:32,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:21:32,050 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 94 states. [2018-09-30 10:21:32,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:32,269 INFO L93 Difference]: Finished difference Result 215 states and 219 transitions. [2018-09-30 10:21:32,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 10:21:32,270 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 198 [2018-09-30 10:21:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:32,271 INFO L225 Difference]: With dead ends: 215 [2018-09-30 10:21:32,271 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 10:21:32,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:21:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 10:21:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 10:21:32,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 10:21:32,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-09-30 10:21:32,278 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 198 [2018-09-30 10:21:32,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:32,278 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-09-30 10:21:32,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:21:32,278 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-09-30 10:21:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 10:21:32,279 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:32,279 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:32,279 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:32,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:32,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1590938268, now seen corresponding path program 91 times [2018-09-30 10:21:32,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:32,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:32,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:32,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:32,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:36,347 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:36,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:36,354 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:21:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:36,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:36,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:36,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 10:21:36,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 10:21:36,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 10:21:36,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:21:36,569 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 95 states. [2018-09-30 10:21:36,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:36,788 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2018-09-30 10:21:36,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 10:21:36,789 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 200 [2018-09-30 10:21:36,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:36,790 INFO L225 Difference]: With dead ends: 217 [2018-09-30 10:21:36,790 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 10:21:36,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:21:36,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 10:21:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 10:21:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 10:21:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-30 10:21:36,796 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-30 10:21:36,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:36,796 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-30 10:21:36,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 10:21:36,796 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-30 10:21:36,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 10:21:36,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:36,797 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:36,797 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:36,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:36,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1723516000, now seen corresponding path program 92 times [2018-09-30 10:21:36,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:36,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:36,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:36,798 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:21:36,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:40,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:40,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:40,484 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:21:40,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:21:40,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:40,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:40,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:40,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 10:21:40,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:21:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:21:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:21:40,682 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 96 states. [2018-09-30 10:21:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:40,940 INFO L93 Difference]: Finished difference Result 219 states and 223 transitions. [2018-09-30 10:21:40,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 10:21:40,940 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 202 [2018-09-30 10:21:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:40,942 INFO L225 Difference]: With dead ends: 219 [2018-09-30 10:21:40,942 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 10:21:40,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:21:40,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 10:21:40,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 10:21:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 10:21:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-30 10:21:40,951 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2018-09-30 10:21:40,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:40,951 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-30 10:21:40,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:21:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-30 10:21:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 10:21:40,952 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:40,952 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:40,952 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:40,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash 48333916, now seen corresponding path program 93 times [2018-09-30 10:21:40,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:40,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:40,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:40,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:40,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:44,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:44,637 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:44,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:21:44,962 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 95 check-sat command(s) [2018-09-30 10:21:44,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:44,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:45,026 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:45,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 10:21:45,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 10:21:45,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 10:21:45,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 10:21:45,027 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 97 states. [2018-09-30 10:21:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:45,257 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2018-09-30 10:21:45,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 10:21:45,257 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 204 [2018-09-30 10:21:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:45,258 INFO L225 Difference]: With dead ends: 221 [2018-09-30 10:21:45,258 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 10:21:45,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 10:21:45,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 10:21:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-30 10:21:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 10:21:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2018-09-30 10:21:45,264 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2018-09-30 10:21:45,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:45,265 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2018-09-30 10:21:45,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 10:21:45,265 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2018-09-30 10:21:45,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 10:21:45,266 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:45,266 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:45,266 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:45,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:45,266 INFO L82 PathProgramCache]: Analyzing trace with hash 811087192, now seen corresponding path program 94 times [2018-09-30 10:21:45,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:45,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:45,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:45,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:45,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:48,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:48,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:48,972 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:21:49,106 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:21:49,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:49,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:49,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:49,171 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 10:21:49,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:21:49,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:21:49,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:21:49,173 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 98 states. [2018-09-30 10:21:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:49,382 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2018-09-30 10:21:49,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 10:21:49,382 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 206 [2018-09-30 10:21:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:49,383 INFO L225 Difference]: With dead ends: 223 [2018-09-30 10:21:49,383 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 10:21:49,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:21:49,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 10:21:49,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 10:21:49,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 10:21:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-30 10:21:49,389 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-30 10:21:49,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:49,390 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-30 10:21:49,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:21:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-30 10:21:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 10:21:49,390 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:49,391 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:49,391 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:49,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:49,391 INFO L82 PathProgramCache]: Analyzing trace with hash -622422188, now seen corresponding path program 95 times [2018-09-30 10:21:49,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:49,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:49,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:49,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:49,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:53,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:53,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:53,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:53,067 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:21:53,382 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2018-09-30 10:21:53,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:53,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:53,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:53,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 10:21:53,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 10:21:53,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 10:21:53,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 10:21:53,449 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 99 states. [2018-09-30 10:21:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:53,803 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-09-30 10:21:53,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 10:21:53,803 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 208 [2018-09-30 10:21:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:53,804 INFO L225 Difference]: With dead ends: 225 [2018-09-30 10:21:53,804 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 10:21:53,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 10:21:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 10:21:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 10:21:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 10:21:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-30 10:21:53,812 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 208 [2018-09-30 10:21:53,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:53,812 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-30 10:21:53,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 10:21:53,812 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-30 10:21:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 10:21:53,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:53,813 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:53,813 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:53,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:53,813 INFO L82 PathProgramCache]: Analyzing trace with hash 459565648, now seen corresponding path program 96 times [2018-09-30 10:21:53,814 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:53,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:53,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:53,814 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:53,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:21:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:57,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:21:57,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:21:57,345 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:21:57,657 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2018-09-30 10:21:57,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:21:57,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:21:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:21:57,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:21:57,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 10:21:57,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:21:57,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:21:57,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:21:57,724 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 100 states. [2018-09-30 10:21:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:21:58,014 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2018-09-30 10:21:58,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 10:21:58,014 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 210 [2018-09-30 10:21:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:21:58,015 INFO L225 Difference]: With dead ends: 227 [2018-09-30 10:21:58,015 INFO L226 Difference]: Without dead ends: 213 [2018-09-30 10:21:58,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:21:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-30 10:21:58,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-30 10:21:58,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 10:21:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2018-09-30 10:21:58,022 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 210 [2018-09-30 10:21:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:21:58,022 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2018-09-30 10:21:58,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:21:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2018-09-30 10:21:58,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 10:21:58,023 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:21:58,023 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:21:58,023 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:21:58,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:21:58,024 INFO L82 PathProgramCache]: Analyzing trace with hash 867790412, now seen corresponding path program 97 times [2018-09-30 10:21:58,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:21:58,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:21:58,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:58,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:21:58,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:21:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:01,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:01,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:01,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:01,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:01,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:01,879 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 10:22:01,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 10:22:01,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 10:22:01,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:22:01,881 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 101 states. [2018-09-30 10:22:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:02,205 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-09-30 10:22:02,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 10:22:02,205 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 212 [2018-09-30 10:22:02,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:02,207 INFO L225 Difference]: With dead ends: 229 [2018-09-30 10:22:02,207 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 10:22:02,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:22:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 10:22:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-30 10:22:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 10:22:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-09-30 10:22:02,217 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 212 [2018-09-30 10:22:02,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:02,217 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-09-30 10:22:02,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 10:22:02,217 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-09-30 10:22:02,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 10:22:02,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:02,218 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:22:02,218 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:02,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:02,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1965202616, now seen corresponding path program 98 times [2018-09-30 10:22:02,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:02,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:02,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:02,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:02,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:06,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:06,089 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:06,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:06,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:22:06,243 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:06,244 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:06,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:06,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:06,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 10:22:06,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:22:06,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:22:06,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:22:06,315 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 102 states. [2018-09-30 10:22:06,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:06,648 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2018-09-30 10:22:06,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 10:22:06,648 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 214 [2018-09-30 10:22:06,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:06,650 INFO L225 Difference]: With dead ends: 231 [2018-09-30 10:22:06,650 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 10:22:06,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:22:06,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 10:22:06,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 10:22:06,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 10:22:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-09-30 10:22:06,662 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 214 [2018-09-30 10:22:06,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:06,663 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-09-30 10:22:06,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:22:06,663 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-09-30 10:22:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 10:22:06,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:06,664 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:22:06,664 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:06,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1462236860, now seen corresponding path program 99 times [2018-09-30 10:22:06,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:06,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:06,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:06,667 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:06,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:10,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:10,685 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:10,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:22:11,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 101 check-sat command(s) [2018-09-30 10:22:11,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:11,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:11,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:11,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 10:22:11,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 10:22:11,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 10:22:11,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:22:11,106 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 103 states. [2018-09-30 10:22:11,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:11,543 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2018-09-30 10:22:11,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 10:22:11,544 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 216 [2018-09-30 10:22:11,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:11,545 INFO L225 Difference]: With dead ends: 233 [2018-09-30 10:22:11,545 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 10:22:11,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:22:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 10:22:11,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 10:22:11,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 10:22:11,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2018-09-30 10:22:11,554 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 216 [2018-09-30 10:22:11,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:11,555 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2018-09-30 10:22:11,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 10:22:11,555 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2018-09-30 10:22:11,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 10:22:11,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:11,556 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:22:11,556 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:11,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:11,556 INFO L82 PathProgramCache]: Analyzing trace with hash 851517504, now seen corresponding path program 100 times [2018-09-30 10:22:11,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:11,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:11,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:11,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:11,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:15,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:15,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:15,599 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:22:15,747 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:22:15,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:15,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:15,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:15,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 10:22:15,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:22:15,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:22:15,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:22:15,837 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 104 states. [2018-09-30 10:22:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:16,364 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2018-09-30 10:22:16,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 10:22:16,364 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 218 [2018-09-30 10:22:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:16,365 INFO L225 Difference]: With dead ends: 235 [2018-09-30 10:22:16,365 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 10:22:16,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:22:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 10:22:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 10:22:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 10:22:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-30 10:22:16,373 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-09-30 10:22:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:16,374 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-30 10:22:16,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:22:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-30 10:22:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 10:22:16,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:16,375 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:22:16,375 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:16,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash -423598020, now seen corresponding path program 101 times [2018-09-30 10:22:16,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:16,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:16,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:16,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:16,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:20,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:20,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:20,643 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:22:20,991 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2018-09-30 10:22:20,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:20,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:21,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:21,062 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 10:22:21,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 10:22:21,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 10:22:21,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 10:22:21,063 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 105 states. [2018-09-30 10:22:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:21,534 INFO L93 Difference]: Finished difference Result 237 states and 241 transitions. [2018-09-30 10:22:21,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 10:22:21,535 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 220 [2018-09-30 10:22:21,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:21,535 INFO L225 Difference]: With dead ends: 237 [2018-09-30 10:22:21,535 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 10:22:21,536 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 10:22:21,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 10:22:21,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 10:22:21,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 10:22:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-09-30 10:22:21,543 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 220 [2018-09-30 10:22:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:21,543 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-09-30 10:22:21,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 10:22:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-09-30 10:22:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 10:22:21,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:21,544 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:22:21,544 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:21,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:21,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1743937224, now seen corresponding path program 102 times [2018-09-30 10:22:21,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:21,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:21,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:21,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:21,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:25,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:25,771 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:25,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:25,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:22:26,130 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 104 check-sat command(s) [2018-09-30 10:22:26,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:26,137 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:26,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:26,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 10:22:26,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:22:26,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:22:26,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:22:26,207 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 106 states. [2018-09-30 10:22:26,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:26,701 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2018-09-30 10:22:26,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 10:22:26,701 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 222 [2018-09-30 10:22:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:26,702 INFO L225 Difference]: With dead ends: 239 [2018-09-30 10:22:26,702 INFO L226 Difference]: Without dead ends: 225 [2018-09-30 10:22:26,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:22:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-30 10:22:26,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-30 10:22:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 10:22:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-09-30 10:22:26,711 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 222 [2018-09-30 10:22:26,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:26,712 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-09-30 10:22:26,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:22:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-09-30 10:22:26,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 10:22:26,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:26,712 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:22:26,713 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:26,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:26,713 INFO L82 PathProgramCache]: Analyzing trace with hash 720407348, now seen corresponding path program 103 times [2018-09-30 10:22:26,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:26,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:26,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:26,714 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:26,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:31,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:31,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:31,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:31,203 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:31,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:31,296 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 10:22:31,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 10:22:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 10:22:31,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 10:22:31,299 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 107 states. [2018-09-30 10:22:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:31,690 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2018-09-30 10:22:31,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 10:22:31,691 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 224 [2018-09-30 10:22:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:31,692 INFO L225 Difference]: With dead ends: 241 [2018-09-30 10:22:31,692 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 10:22:31,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 10:22:31,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 10:22:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 10:22:31,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 10:22:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-09-30 10:22:31,703 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-09-30 10:22:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:31,704 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-09-30 10:22:31,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 10:22:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-09-30 10:22:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 10:22:31,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:31,705 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:22:31,705 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:31,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1866406352, now seen corresponding path program 104 times [2018-09-30 10:22:31,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:31,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:31,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:31,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:22:31,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:36,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:36,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:36,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:22:36,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:22:36,305 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:36,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:36,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:36,376 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 10:22:36,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:22:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:22:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:22:36,377 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 108 states. [2018-09-30 10:22:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:36,771 INFO L93 Difference]: Finished difference Result 243 states and 247 transitions. [2018-09-30 10:22:36,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 10:22:36,772 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 226 [2018-09-30 10:22:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:36,772 INFO L225 Difference]: With dead ends: 243 [2018-09-30 10:22:36,772 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 10:22:36,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:22:36,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 10:22:36,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 10:22:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 10:22:36,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-09-30 10:22:36,779 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 226 [2018-09-30 10:22:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:36,779 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-09-30 10:22:36,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:22:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-09-30 10:22:36,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 10:22:36,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:36,780 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:22:36,780 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:36,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:36,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1008307668, now seen corresponding path program 105 times [2018-09-30 10:22:36,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:36,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:36,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:36,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:36,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:41,261 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:41,261 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:41,269 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:22:41,673 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 107 check-sat command(s) [2018-09-30 10:22:41,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:41,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:41,744 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:41,744 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 10:22:41,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 10:22:41,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 10:22:41,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 10:22:41,746 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 109 states. [2018-09-30 10:22:42,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:42,235 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2018-09-30 10:22:42,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 10:22:42,235 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 228 [2018-09-30 10:22:42,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:42,236 INFO L225 Difference]: With dead ends: 245 [2018-09-30 10:22:42,236 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 10:22:42,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 10:22:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 10:22:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-30 10:22:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 10:22:42,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-09-30 10:22:42,242 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 228 [2018-09-30 10:22:42,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:42,243 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-09-30 10:22:42,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 10:22:42,243 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-09-30 10:22:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 10:22:42,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:42,243 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:22:42,244 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:42,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:42,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1009193176, now seen corresponding path program 106 times [2018-09-30 10:22:42,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:42,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:42,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:42,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:42,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:42,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:22:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:46,770 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:22:46,770 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:22:46,777 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:22:46,924 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:22:46,924 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:22:46,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:22:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-30 10:22:46,996 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:22:46,996 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 10:22:46,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 10:22:46,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 10:22:46,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:22:46,998 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 110 states. [2018-09-30 10:22:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:22:47,338 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-09-30 10:22:47,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 10:22:47,338 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 230 [2018-09-30 10:22:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:22:47,339 INFO L225 Difference]: With dead ends: 247 [2018-09-30 10:22:47,339 INFO L226 Difference]: Without dead ends: 233 [2018-09-30 10:22:47,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:22:47,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-30 10:22:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-30 10:22:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-30 10:22:47,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2018-09-30 10:22:47,346 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 230 [2018-09-30 10:22:47,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:22:47,347 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2018-09-30 10:22:47,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 10:22:47,347 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2018-09-30 10:22:47,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 10:22:47,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:22:47,347 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 10:22:47,347 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:22:47,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:22:47,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1860166364, now seen corresponding path program 107 times [2018-09-30 10:22:47,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:22:47,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:22:47,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:47,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:22:47,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:22:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 10:22:49,274 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:22:49,278 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:22:49,278 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:22:49 BoogieIcfgContainer [2018-09-30 10:22:49,278 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:22:49,279 INFO L168 Benchmark]: Toolchain (without parser) took 235900.29 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 661.1 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -596.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-09-30 10:22:49,281 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:22:49,281 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:22:49,281 INFO L168 Benchmark]: Boogie Preprocessor took 24.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:22:49,282 INFO L168 Benchmark]: RCFGBuilder took 391.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:22:49,282 INFO L168 Benchmark]: TraceAbstraction took 235435.94 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 661.1 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -617.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. [2018-09-30 10:22:49,284 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.24 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.44 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 391.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235435.94 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 661.1 MB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -617.3 MB). Peak memory consumption was 1.2 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 83). Cancelled while BasicCegarLoop was analyzing trace of length 233 with TraceHistMax 109, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 68 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 235.3s OverallTime, 111 OverallIterations, 109 TraceHistogramMax, 26.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 990 SDtfs, 31 SDslu, 22141 SDs, 0 SdLazy, 12507 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19155 GetRequests, 13263 SyntacticMatches, 0 SemanticMatches, 5892 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 177.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=233occurred in iteration=110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 110 MinimizatonAttempts, 11 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 14.7s SatisfiabilityAnalysisTime, 184.3s InterpolantComputationTime, 26547 NumberOfCodeBlocks, 26547 NumberOfCodeBlocksAsserted, 3096 NumberOfCheckSat, 26330 ConstructedInterpolants, 0 QuantifiedInterpolants, 11478164 SizeOfPredicates, 107 NumberOfNonLiveVariables, 64696 ConjunctsInSsa, 5992 ConjunctsInUnsatCore, 217 InterpolantComputations, 3 PerfectInterpolantSequences, 3828/843564 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-22-49-298.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-22-49-298.csv Completed graceful shutdown