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/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-c372c2b [2018-10-02 11:39:47,159 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:39:47,162 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:39:47,174 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:39:47,174 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:39:47,175 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:39:47,177 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:39:47,179 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:39:47,181 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:39:47,182 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:39:47,183 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:39:47,210 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 [2018-10-02 11:39:47,228 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:39:47,231 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:39:47,233 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:39:47,233 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:39:47,233 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:39:47,234 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:39:47,234 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:39:47,234 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:39:47,239 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:39:47,240 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:39:47,240 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:39:47,240 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:39:47,240 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:39:47,240 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:39:47,241 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:39:47,241 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:39:47,241 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:39:47,241 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:39:47,242 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:39:47,242 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:39:47,243 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:39:47,243 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:39:47,243 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:39:47,243 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:39:47,243 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:39:47,244 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:39:47,244 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:39:47,244 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:39:47,244 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:39:47,244 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:39:47,293 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:39:47,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:39:47,311 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:39:47,312 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:39:47,314 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:39:47,314 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-10-02 11:39:47,315 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-10-02 11:39:47,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:39:47,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:39:47,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:39:47,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:39:47,371 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:39:47,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:39:47" (1/1) ... [2018-10-02 11:39:47,405 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:39:47" (1/1) ... [2018-10-02 11:39:47,412 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:39:47,413 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:39:47,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:39:47,414 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:39:47,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:39:47" (1/1) ... [2018-10-02 11:39:47,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:39:47" (1/1) ... [2018-10-02 11:39:47,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:39:47" (1/1) ... [2018-10-02 11:39:47,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:39:47" (1/1) ... [2018-10-02 11:39:47,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:39:47" (1/1) ... [2018-10-02 11:39:47,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:39:47" (1/1) ... [2018-10-02 11:39:47,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:39:47" (1/1) ... [2018-10-02 11:39:47,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:39:47,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:39:47,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:39:47,439 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:39:47,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:39:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:39:47,518 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-02 11:39:47,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:39:47,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:39:47,739 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:39:47,739 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:39:47 BoogieIcfgContainer [2018-10-02 11:39:47,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:39:47,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:39:47,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:39:47,748 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:39:47,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:39:47" (1/2) ... [2018-10-02 11:39:47,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2530492a and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:39:47, skipping insertion in model container [2018-10-02 11:39:47,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:39:47" (2/2) ... [2018-10-02 11:39:47,753 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-10-02 11:39:47,768 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:39:47,779 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:39:47,826 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:39:47,826 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:39:47,827 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:39:47,827 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:39:47,827 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:39:47,827 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:39:47,828 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:39:47,828 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:39:47,828 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:39:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-10-02 11:39:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-02 11:39:47,850 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:47,851 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-02 11:39:47,853 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:47,859 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:47,860 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-10-02 11:39:47,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:47,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:47,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:47,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:47,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:48,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:48,038 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:39:48,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:39:48,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:39:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:39:48,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:39:48,058 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-10-02 11:39:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:48,125 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-10-02 11:39:48,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:39:48,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-02 11:39:48,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:48,139 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:39:48,139 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:39:48,143 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 [2018-10-02 11:39:48,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:39:48,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-10-02 11:39:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-02 11:39:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-10-02 11:39:48,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-10-02 11:39:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:48,219 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-10-02 11:39:48,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:39:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-10-02 11:39:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-02 11:39:48,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:48,223 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-02 11:39:48,223 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:48,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:48,224 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-10-02 11:39:48,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:48,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:48,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:48,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:48,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:48,327 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:39:48,327 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 11:39:48,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:39:48,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:39:48,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:39:48,330 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-10-02 11:39:48,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:48,362 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-10-02 11:39:48,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:39:48,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-10-02 11:39:48,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:48,364 INFO L225 Difference]: With dead ends: 11 [2018-10-02 11:39:48,364 INFO L226 Difference]: Without dead ends: 7 [2018-10-02 11:39:48,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:39:48,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-02 11:39:48,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-02 11:39:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-02 11:39:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-10-02 11:39:48,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-10-02 11:39:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:48,368 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-10-02 11:39:48,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:39:48,368 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-10-02 11:39:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-02 11:39:48,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:48,369 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-02 11:39:48,369 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:48,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:48,370 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-10-02 11:39:48,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:48,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:48,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:48,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:48,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:48,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:48,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:48,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:48,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:48,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:48,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-02 11:39:48,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:39:48,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:39:48,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:39:48,573 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-10-02 11:39:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:48,681 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-10-02 11:39:48,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:39:48,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-02 11:39:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:48,682 INFO L225 Difference]: With dead ends: 13 [2018-10-02 11:39:48,682 INFO L226 Difference]: Without dead ends: 8 [2018-10-02 11:39:48,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:39:48,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-02 11:39:48,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-02 11:39:48,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-02 11:39:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-10-02 11:39:48,686 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-10-02 11:39:48,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:48,686 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-10-02 11:39:48,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:39:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-10-02 11:39:48,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-02 11:39:48,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:48,688 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-10-02 11:39:48,688 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:48,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:48,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-10-02 11:39:48,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:48,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:48,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:48,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:48,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-02 11:39:48,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:48,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:48,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:39:48,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:39:48,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:48,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:39:48,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:48,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2018-10-02 11:39:48,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:39:48,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:39:48,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:39:48,957 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 7 states. [2018-10-02 11:39:49,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:49,413 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2018-10-02 11:39:49,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:39:49,414 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-02 11:39:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:49,415 INFO L225 Difference]: With dead ends: 24 [2018-10-02 11:39:49,415 INFO L226 Difference]: Without dead ends: 18 [2018-10-02 11:39:49,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:39:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-02 11:39:49,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-10-02 11:39:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-02 11:39:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-02 11:39:49,422 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-10-02 11:39:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:49,422 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-02 11:39:49,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:39:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-02 11:39:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-02 11:39:49,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:49,424 INFO L375 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-10-02 11:39:49,424 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:49,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:49,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 3 times [2018-10-02 11:39:49,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:49,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:49,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:49,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:49,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-02 11:39:49,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:49,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:49,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:39:49,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-02 11:39:49,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:49,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-10-02 11:39:49,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:49,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-02 11:39:49,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-02 11:39:49,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-02 11:39:49,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:39:49,563 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-10-02 11:39:49,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:49,678 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-10-02 11:39:49,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-02 11:39:49,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-02 11:39:49,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:49,680 INFO L225 Difference]: With dead ends: 24 [2018-10-02 11:39:49,680 INFO L226 Difference]: Without dead ends: 16 [2018-10-02 11:39:49,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-02 11:39:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-02 11:39:49,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-02 11:39:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-02 11:39:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-02 11:39:49,686 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-10-02 11:39:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:49,686 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-02 11:39:49,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-02 11:39:49,687 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-02 11:39:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-02 11:39:49,687 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:49,688 INFO L375 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-10-02 11:39:49,688 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:49,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 4 times [2018-10-02 11:39:49,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:49,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:49,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:49,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:49,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-10-02 11:39:49,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:49,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:49,792 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:39:49,816 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:39:49,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:49,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:49,930 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-10-02 11:39:49,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:49,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2018-10-02 11:39:49,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:39:49,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:39:49,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:39:49,955 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 10 states. [2018-10-02 11:39:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:50,714 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2018-10-02 11:39:50,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:39:50,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-10-02 11:39:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:50,717 INFO L225 Difference]: With dead ends: 40 [2018-10-02 11:39:50,717 INFO L226 Difference]: Without dead ends: 31 [2018-10-02 11:39:50,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:39:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-02 11:39:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-10-02 11:39:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:39:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-10-02 11:39:50,725 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-10-02 11:39:50,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:50,725 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-10-02 11:39:50,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:39:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-10-02 11:39:50,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:39:50,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:50,727 INFO L375 BasicCegarLoop]: trace histogram [15, 3, 3, 1, 1, 1] [2018-10-02 11:39:50,727 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:50,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:50,727 INFO L82 PathProgramCache]: Analyzing trace with hash 198739950, now seen corresponding path program 5 times [2018-10-02 11:39:50,728 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:50,728 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:50,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:50,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:50,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-10-02 11:39:50,823 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:50,824 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:50,831 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:39:50,843 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-02 11:39:50,844 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:50,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-10-02 11:39:50,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:50,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2018-10-02 11:39:50,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:39:50,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:39:50,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:39:50,990 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 12 states. [2018-10-02 11:39:51,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:51,784 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2018-10-02 11:39:51,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:39:51,786 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-10-02 11:39:51,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:51,787 INFO L225 Difference]: With dead ends: 60 [2018-10-02 11:39:51,787 INFO L226 Difference]: Without dead ends: 43 [2018-10-02 11:39:51,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:39:51,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-02 11:39:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2018-10-02 11:39:51,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-02 11:39:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-10-02 11:39:51,798 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2018-10-02 11:39:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:51,798 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-10-02 11:39:51,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:39:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-10-02 11:39:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-02 11:39:51,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:51,800 INFO L375 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-10-02 11:39:51,800 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:51,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:51,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 6 times [2018-10-02 11:39:51,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:51,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:51,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:51,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:51,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-10-02 11:39:51,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:51,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:51,931 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:39:51,971 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-02 11:39:51,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:51,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-10-02 11:39:52,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:52,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:39:52,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-02 11:39:52,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-02 11:39:52,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:39:52,011 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-10-02 11:39:52,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:52,044 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-10-02 11:39:52,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:39:52,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-10-02 11:39:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:52,050 INFO L225 Difference]: With dead ends: 67 [2018-10-02 11:39:52,050 INFO L226 Difference]: Without dead ends: 40 [2018-10-02 11:39:52,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-02 11:39:52,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-02 11:39:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-02 11:39:52,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-02 11:39:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-10-02 11:39:52,060 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-10-02 11:39:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:52,060 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-10-02 11:39:52,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-02 11:39:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-10-02 11:39:52,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-02 11:39:52,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:52,062 INFO L375 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-10-02 11:39:52,063 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:52,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:52,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 7 times [2018-10-02 11:39:52,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:52,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:52,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:52,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:52,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-10-02 11:39:52,277 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:52,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:52,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:52,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-10-02 11:39:52,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:52,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2018-10-02 11:39:52,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:39:52,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:39:52,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:39:52,514 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2018-10-02 11:39:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:54,361 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2018-10-02 11:39:54,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:39:54,361 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-10-02 11:39:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:54,362 INFO L225 Difference]: With dead ends: 93 [2018-10-02 11:39:54,362 INFO L226 Difference]: Without dead ends: 63 [2018-10-02 11:39:54,364 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=945, Invalid=2025, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:39:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-02 11:39:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-10-02 11:39:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-02 11:39:54,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-10-02 11:39:54,376 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2018-10-02 11:39:54,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:54,376 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-10-02 11:39:54,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:39:54,377 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-10-02 11:39:54,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-02 11:39:54,378 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:54,378 INFO L375 BasicCegarLoop]: trace histogram [40, 5, 5, 1, 1, 1] [2018-10-02 11:39:54,379 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:54,379 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:54,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1154943019, now seen corresponding path program 8 times [2018-10-02 11:39:54,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:54,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:54,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:54,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:39:54,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 825 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-10-02 11:39:54,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:54,508 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:54,520 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:39:54,602 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:39:54,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:54,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-10-02 11:39:54,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:54,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2018-10-02 11:39:54,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:39:54,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:39:54,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:39:54,936 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2018-10-02 11:39:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:39:56,296 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2018-10-02 11:39:56,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:39:56,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-10-02 11:39:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:39:56,299 INFO L225 Difference]: With dead ends: 123 [2018-10-02 11:39:56,300 INFO L226 Difference]: Without dead ends: 80 [2018-10-02 11:39:56,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:39:56,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-02 11:39:56,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2018-10-02 11:39:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-02 11:39:56,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-10-02 11:39:56,326 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2018-10-02 11:39:56,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:39:56,327 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-10-02 11:39:56,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:39:56,327 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-10-02 11:39:56,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-02 11:39:56,334 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:39:56,334 INFO L375 BasicCegarLoop]: trace histogram [54, 6, 6, 1, 1, 1] [2018-10-02 11:39:56,335 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:39:56,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:39:56,335 INFO L82 PathProgramCache]: Analyzing trace with hash -2076506525, now seen corresponding path program 9 times [2018-10-02 11:39:56,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:39:56,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:39:56,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:56,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:39:56,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:39:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:39:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-10-02 11:39:56,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:39:56,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:39:56,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:39:56,717 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-02 11:39:56,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:39:56,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:39:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-10-02 11:39:56,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:39:56,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2018-10-02 11:39:56,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:39:56,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:39:56,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:39:56,874 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2018-10-02 11:40:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:00,879 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2018-10-02 11:40:00,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-02 11:40:00,880 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2018-10-02 11:40:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:00,881 INFO L225 Difference]: With dead ends: 157 [2018-10-02 11:40:00,881 INFO L226 Difference]: Without dead ends: 99 [2018-10-02 11:40:00,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2018-10-02 11:40:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-02 11:40:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-10-02 11:40:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-02 11:40:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2018-10-02 11:40:00,908 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 69 [2018-10-02 11:40:00,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:00,910 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2018-10-02 11:40:00,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:40:00,910 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2018-10-02 11:40:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-02 11:40:00,911 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:00,912 INFO L375 BasicCegarLoop]: trace histogram [70, 7, 7, 1, 1, 1] [2018-10-02 11:40:00,912 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:00,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:00,912 INFO L82 PathProgramCache]: Analyzing trace with hash -815084279, now seen corresponding path program 10 times [2018-10-02 11:40:00,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:00,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:00,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:00,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:00,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-10-02 11:40:01,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:01,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:01,181 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:01,239 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:01,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:01,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-10-02 11:40:01,304 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:01,304 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-02 11:40:01,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:40:01,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:40:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:40:01,305 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 10 states. [2018-10-02 11:40:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:01,452 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2018-10-02 11:40:01,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:40:01,454 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2018-10-02 11:40:01,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:01,470 INFO L225 Difference]: With dead ends: 113 [2018-10-02 11:40:01,470 INFO L226 Difference]: Without dead ends: 111 [2018-10-02 11:40:01,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:40:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-02 11:40:01,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2018-10-02 11:40:01,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-02 11:40:01,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-10-02 11:40:01,503 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 87 [2018-10-02 11:40:01,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:01,504 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-10-02 11:40:01,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:40:01,504 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-10-02 11:40:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-02 11:40:01,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:01,509 INFO L375 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-10-02 11:40:01,509 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:01,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:01,510 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 11 times [2018-10-02 11:40:01,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:01,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:01,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:01,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:01,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-02 11:40:01,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:01,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:01,813 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:02,153 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-02 11:40:02,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:02,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-02 11:40:02,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:02,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-02 11:40:02,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-02 11:40:02,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-02 11:40:02,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:40:02,206 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-10-02 11:40:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:02,316 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-10-02 11:40:02,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:40:02,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-10-02 11:40:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:02,318 INFO L225 Difference]: With dead ends: 125 [2018-10-02 11:40:02,318 INFO L226 Difference]: Without dead ends: 123 [2018-10-02 11:40:02,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-02 11:40:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-02 11:40:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-10-02 11:40:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-02 11:40:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-10-02 11:40:02,340 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-10-02 11:40:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:02,340 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-10-02 11:40:02,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-02 11:40:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-10-02 11:40:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-02 11:40:02,342 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:02,342 INFO L375 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-10-02 11:40:02,343 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:02,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 12 times [2018-10-02 11:40:02,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:02,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:02,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:02,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:02,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-02 11:40:02,696 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:02,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:02,705 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:02,794 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-10-02 11:40:02,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:02,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:02,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-10-02 11:40:02,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:02,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-02 11:40:02,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:40:02,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:40:02,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:40:02,844 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-10-02 11:40:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:03,073 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-10-02 11:40:03,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:40:03,074 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-10-02 11:40:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:03,075 INFO L225 Difference]: With dead ends: 137 [2018-10-02 11:40:03,075 INFO L226 Difference]: Without dead ends: 135 [2018-10-02 11:40:03,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:40:03,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-02 11:40:03,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-10-02 11:40:03,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-10-02 11:40:03,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-10-02 11:40:03,100 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-10-02 11:40:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:03,100 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-10-02 11:40:03,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:40:03,101 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-10-02 11:40:03,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-02 11:40:03,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:03,102 INFO L375 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-10-02 11:40:03,103 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:03,103 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:03,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 13 times [2018-10-02 11:40:03,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:03,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:03,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:03,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:03,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-02 11:40:03,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:03,462 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:03,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:03,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-02 11:40:03,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:03,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-02 11:40:03,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:40:03,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:40:03,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:40:03,605 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-10-02 11:40:03,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:03,903 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-10-02 11:40:03,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:40:03,903 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-10-02 11:40:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:03,904 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:40:03,904 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 11:40:03,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:40:03,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 11:40:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-10-02 11:40:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-02 11:40:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-10-02 11:40:03,935 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-10-02 11:40:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:03,936 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-10-02 11:40:03,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:40:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-10-02 11:40:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-02 11:40:03,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:03,937 INFO L375 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-10-02 11:40:03,938 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:03,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:03,938 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 14 times [2018-10-02 11:40:03,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:03,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:03,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:03,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:03,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:04,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-10-02 11:40:04,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:04,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:04,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:04,352 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:04,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:04,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-10-02 11:40:04,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:04,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-02 11:40:04,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:40:04,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:40:04,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:40:04,417 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-10-02 11:40:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:04,525 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-10-02 11:40:04,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:40:04,526 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-10-02 11:40:04,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:04,527 INFO L225 Difference]: With dead ends: 161 [2018-10-02 11:40:04,527 INFO L226 Difference]: Without dead ends: 159 [2018-10-02 11:40:04,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:40:04,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-02 11:40:04,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-10-02 11:40:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-10-02 11:40:04,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-10-02 11:40:04,550 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-10-02 11:40:04,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:04,551 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-10-02 11:40:04,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:40:04,551 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-10-02 11:40:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-02 11:40:04,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:04,553 INFO L375 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-10-02 11:40:04,553 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:04,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:04,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 15 times [2018-10-02 11:40:04,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:04,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:04,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:04,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:04,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-02 11:40:04,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:04,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:04,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:04,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-10-02 11:40:04,976 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:04,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-02 11:40:05,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:05,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-02 11:40:05,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:40:05,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:40:05,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:40:05,025 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-10-02 11:40:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:05,157 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-10-02 11:40:05,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-02 11:40:05,158 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-10-02 11:40:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:05,159 INFO L225 Difference]: With dead ends: 173 [2018-10-02 11:40:05,159 INFO L226 Difference]: Without dead ends: 171 [2018-10-02 11:40:05,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:40:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-02 11:40:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-10-02 11:40:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-02 11:40:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-10-02 11:40:05,194 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-10-02 11:40:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:05,195 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-10-02 11:40:05,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:40:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-10-02 11:40:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-10-02 11:40:05,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:05,197 INFO L375 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-10-02 11:40:05,197 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:05,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:05,197 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 16 times [2018-10-02 11:40:05,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:05,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:05,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:05,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:05,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-10-02 11:40:05,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:05,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:05,571 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:05,661 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:05,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:05,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-10-02 11:40:05,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:05,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-02 11:40:05,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:40:05,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:40:05,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:40:05,757 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-10-02 11:40:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:05,893 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-10-02 11:40:05,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-02 11:40:05,893 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-10-02 11:40:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:05,895 INFO L225 Difference]: With dead ends: 185 [2018-10-02 11:40:05,895 INFO L226 Difference]: Without dead ends: 183 [2018-10-02 11:40:05,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:40:05,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-02 11:40:05,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-10-02 11:40:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-10-02 11:40:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-10-02 11:40:05,931 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-10-02 11:40:05,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:05,931 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-10-02 11:40:05,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:40:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-10-02 11:40:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-10-02 11:40:05,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:05,933 INFO L375 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-10-02 11:40:05,934 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:05,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:05,934 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 17 times [2018-10-02 11:40:05,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:05,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:05,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:05,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:05,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-02 11:40:06,813 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:06,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:06,830 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:07,057 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-10-02 11:40:07,057 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:07,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-02 11:40:07,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:07,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-02 11:40:07,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-02 11:40:07,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-02 11:40:07,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:40:07,125 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-10-02 11:40:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:07,389 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-10-02 11:40:07,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-02 11:40:07,390 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-10-02 11:40:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:07,392 INFO L225 Difference]: With dead ends: 197 [2018-10-02 11:40:07,392 INFO L226 Difference]: Without dead ends: 195 [2018-10-02 11:40:07,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-02 11:40:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-02 11:40:07,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-10-02 11:40:07,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-10-02 11:40:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-10-02 11:40:07,430 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-10-02 11:40:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:07,430 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-10-02 11:40:07,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-02 11:40:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-10-02 11:40:07,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-02 11:40:07,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:07,432 INFO L375 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-10-02 11:40:07,433 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:07,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 18 times [2018-10-02 11:40:07,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:07,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:07,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:07,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:07,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-10-02 11:40:07,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:07,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:07,769 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:08,161 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-10-02 11:40:08,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:08,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-10-02 11:40:08,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:08,228 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-02 11:40:08,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:40:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:40:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:40:08,229 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-10-02 11:40:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:08,359 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-10-02 11:40:08,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-02 11:40:08,360 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-10-02 11:40:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:08,361 INFO L225 Difference]: With dead ends: 209 [2018-10-02 11:40:08,361 INFO L226 Difference]: Without dead ends: 207 [2018-10-02 11:40:08,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:40:08,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-02 11:40:08,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-10-02 11:40:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-02 11:40:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-10-02 11:40:08,399 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-10-02 11:40:08,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:08,399 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-10-02 11:40:08,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:40:08,400 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-10-02 11:40:08,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-10-02 11:40:08,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:08,401 INFO L375 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-10-02 11:40:08,401 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:08,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:08,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 19 times [2018-10-02 11:40:08,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:08,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:08,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:08,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:08,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-02 11:40:09,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:09,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:09,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:09,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-02 11:40:09,480 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:09,480 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-02 11:40:09,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:40:09,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:40:09,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:40:09,481 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-10-02 11:40:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:09,621 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-10-02 11:40:09,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-02 11:40:09,621 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-10-02 11:40:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:09,622 INFO L225 Difference]: With dead ends: 221 [2018-10-02 11:40:09,622 INFO L226 Difference]: Without dead ends: 219 [2018-10-02 11:40:09,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:40:09,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-02 11:40:09,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-10-02 11:40:09,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-10-02 11:40:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-10-02 11:40:09,668 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-10-02 11:40:09,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:09,668 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-10-02 11:40:09,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:40:09,668 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-10-02 11:40:09,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-02 11:40:09,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:09,670 INFO L375 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-10-02 11:40:09,670 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:09,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:09,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 20 times [2018-10-02 11:40:09,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:09,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:09,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:09,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:09,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-10-02 11:40:10,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:10,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:10,165 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:10,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:10,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:10,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-10-02 11:40:10,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:10,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-02 11:40:10,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:40:10,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:40:10,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:40:10,349 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-10-02 11:40:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:10,490 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-10-02 11:40:10,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-02 11:40:10,491 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-10-02 11:40:10,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:10,493 INFO L225 Difference]: With dead ends: 233 [2018-10-02 11:40:10,493 INFO L226 Difference]: Without dead ends: 231 [2018-10-02 11:40:10,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:40:10,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-02 11:40:10,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-10-02 11:40:10,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-02 11:40:10,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-10-02 11:40:10,540 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-10-02 11:40:10,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:10,540 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-10-02 11:40:10,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:40:10,541 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-10-02 11:40:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-10-02 11:40:10,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:10,542 INFO L375 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-10-02 11:40:10,542 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:10,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:10,543 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 21 times [2018-10-02 11:40:10,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:10,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:10,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:10,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:10,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-02 11:40:11,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:11,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:11,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:11,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 109 check-sat command(s) [2018-10-02 11:40:11,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:11,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:11,460 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-02 11:40:11,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:11,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-02 11:40:11,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:40:11,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:40:11,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:40:11,482 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-10-02 11:40:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:11,615 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-10-02 11:40:11,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-02 11:40:11,616 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-10-02 11:40:11,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:11,617 INFO L225 Difference]: With dead ends: 245 [2018-10-02 11:40:11,617 INFO L226 Difference]: Without dead ends: 243 [2018-10-02 11:40:11,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:40:11,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-02 11:40:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-10-02 11:40:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-10-02 11:40:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-10-02 11:40:11,669 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-10-02 11:40:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:11,670 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-10-02 11:40:11,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:40:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-10-02 11:40:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-10-02 11:40:11,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:11,671 INFO L375 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-10-02 11:40:11,671 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:11,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:11,672 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 22 times [2018-10-02 11:40:11,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:11,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:11,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:11,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:11,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-10-02 11:40:12,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:12,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:12,093 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:12,210 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:12,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:12,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-10-02 11:40:12,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:12,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-02 11:40:12,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:40:12,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:40:12,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:40:12,281 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-10-02 11:40:12,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:12,441 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-10-02 11:40:12,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:40:12,441 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-10-02 11:40:12,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:12,443 INFO L225 Difference]: With dead ends: 257 [2018-10-02 11:40:12,443 INFO L226 Difference]: Without dead ends: 255 [2018-10-02 11:40:12,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:40:12,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-10-02 11:40:12,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-10-02 11:40:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-10-02 11:40:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-10-02 11:40:12,521 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-10-02 11:40:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:12,522 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-10-02 11:40:12,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:40:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-10-02 11:40:12,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-02 11:40:12,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:12,524 INFO L375 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-10-02 11:40:12,524 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:12,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:12,524 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 23 times [2018-10-02 11:40:12,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:12,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:12,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:12,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:12,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-10-02 11:40:13,167 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:13,167 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:13,174 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:13,545 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2018-10-02 11:40:13,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:13,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-10-02 11:40:13,634 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:13,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-02 11:40:13,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:40:13,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:40:13,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:40:13,635 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-10-02 11:40:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:13,832 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-10-02 11:40:13,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-02 11:40:13,833 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-10-02 11:40:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:13,834 INFO L225 Difference]: With dead ends: 269 [2018-10-02 11:40:13,834 INFO L226 Difference]: Without dead ends: 267 [2018-10-02 11:40:13,835 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:40:13,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-02 11:40:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-10-02 11:40:13,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-02 11:40:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-10-02 11:40:13,891 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-10-02 11:40:13,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:13,891 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-10-02 11:40:13,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:40:13,891 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-10-02 11:40:13,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-10-02 11:40:13,892 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:13,892 INFO L375 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-10-02 11:40:13,893 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:13,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:13,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 24 times [2018-10-02 11:40:13,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:13,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:13,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:13,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:13,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-10-02 11:40:14,472 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:14,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:14,481 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:14,825 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2018-10-02 11:40:14,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:14,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-10-02 11:40:14,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:14,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-02 11:40:14,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-02 11:40:14,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-02 11:40:14,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:40:14,916 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-10-02 11:40:15,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:15,480 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-10-02 11:40:15,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-02 11:40:15,480 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-10-02 11:40:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:15,482 INFO L225 Difference]: With dead ends: 281 [2018-10-02 11:40:15,482 INFO L226 Difference]: Without dead ends: 279 [2018-10-02 11:40:15,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-02 11:40:15,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-10-02 11:40:15,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-10-02 11:40:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-10-02 11:40:15,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-10-02 11:40:15,580 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-10-02 11:40:15,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:15,580 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-10-02 11:40:15,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-02 11:40:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-10-02 11:40:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-02 11:40:15,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:15,582 INFO L375 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-10-02 11:40:15,583 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:15,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 25 times [2018-10-02 11:40:15,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:15,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:15,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:15,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:15,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-10-02 11:40:16,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:16,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:16,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:16,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-10-02 11:40:16,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:16,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-02 11:40:16,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-02 11:40:16,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-02 11:40:16,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:40:16,705 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-10-02 11:40:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:17,538 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-10-02 11:40:17,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-02 11:40:17,539 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-10-02 11:40:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:17,541 INFO L225 Difference]: With dead ends: 293 [2018-10-02 11:40:17,541 INFO L226 Difference]: Without dead ends: 291 [2018-10-02 11:40:17,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-02 11:40:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-10-02 11:40:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-10-02 11:40:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-10-02 11:40:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-10-02 11:40:17,636 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-10-02 11:40:17,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:17,637 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-10-02 11:40:17,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-02 11:40:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-10-02 11:40:17,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-10-02 11:40:17,639 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:17,639 INFO L375 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-10-02 11:40:17,639 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:17,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:17,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 26 times [2018-10-02 11:40:17,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:17,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:17,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:17,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:17,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-10-02 11:40:18,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:18,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:18,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:18,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:18,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:18,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-10-02 11:40:18,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:18,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-02 11:40:18,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-02 11:40:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-02 11:40:18,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:40:18,779 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-10-02 11:40:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:19,040 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-10-02 11:40:19,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-02 11:40:19,045 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-10-02 11:40:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:19,047 INFO L225 Difference]: With dead ends: 305 [2018-10-02 11:40:19,047 INFO L226 Difference]: Without dead ends: 303 [2018-10-02 11:40:19,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-02 11:40:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-10-02 11:40:19,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-10-02 11:40:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-10-02 11:40:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-10-02 11:40:19,154 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-10-02 11:40:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:19,154 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-10-02 11:40:19,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-02 11:40:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-10-02 11:40:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-10-02 11:40:19,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:19,156 INFO L375 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-10-02 11:40:19,156 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:19,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:19,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 27 times [2018-10-02 11:40:19,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:19,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:19,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:19,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:19,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-02 11:40:21,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:21,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:21,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:21,896 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 145 check-sat command(s) [2018-10-02 11:40:21,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:21,903 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-02 11:40:22,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:22,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-02 11:40:22,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-02 11:40:22,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-02 11:40:22,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:40:22,034 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-10-02 11:40:22,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:22,409 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-10-02 11:40:22,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-02 11:40:22,409 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-10-02 11:40:22,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:22,411 INFO L225 Difference]: With dead ends: 317 [2018-10-02 11:40:22,411 INFO L226 Difference]: Without dead ends: 315 [2018-10-02 11:40:22,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-02 11:40:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-02 11:40:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-10-02 11:40:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-10-02 11:40:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-10-02 11:40:22,563 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-10-02 11:40:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:22,564 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-10-02 11:40:22,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-02 11:40:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-10-02 11:40:22,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-10-02 11:40:22,569 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:22,569 INFO L375 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-10-02 11:40:22,569 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:22,570 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:22,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 28 times [2018-10-02 11:40:22,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:22,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:22,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:22,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:24,104 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-10-02 11:40:24,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:24,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:24,114 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:24,279 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:24,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:24,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-10-02 11:40:24,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:24,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-02 11:40:24,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-02 11:40:24,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-02 11:40:24,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:40:24,403 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-10-02 11:40:24,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:24,643 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-10-02 11:40:24,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-02 11:40:24,643 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-10-02 11:40:24,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:24,645 INFO L225 Difference]: With dead ends: 329 [2018-10-02 11:40:24,645 INFO L226 Difference]: Without dead ends: 327 [2018-10-02 11:40:24,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-02 11:40:24,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-10-02 11:40:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-10-02 11:40:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-10-02 11:40:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-10-02 11:40:24,740 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-10-02 11:40:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:24,741 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-10-02 11:40:24,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-02 11:40:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-10-02 11:40:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-10-02 11:40:24,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:24,743 INFO L375 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-10-02 11:40:24,743 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:24,743 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:24,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 29 times [2018-10-02 11:40:24,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:24,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:24,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:24,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:26,042 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-02 11:40:26,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:26,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:26,050 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:26,479 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 157 check-sat command(s) [2018-10-02 11:40:26,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:26,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-02 11:40:26,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:26,583 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-02 11:40:26,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-02 11:40:26,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-02 11:40:26,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:40:26,584 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-10-02 11:40:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:26,877 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-10-02 11:40:26,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-02 11:40:26,877 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-10-02 11:40:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:26,879 INFO L225 Difference]: With dead ends: 341 [2018-10-02 11:40:26,880 INFO L226 Difference]: Without dead ends: 339 [2018-10-02 11:40:26,881 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-02 11:40:26,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-02 11:40:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-10-02 11:40:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-10-02 11:40:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-10-02 11:40:27,002 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-10-02 11:40:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:27,002 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-10-02 11:40:27,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-02 11:40:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-10-02 11:40:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-10-02 11:40:27,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:27,004 INFO L375 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-10-02 11:40:27,005 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:27,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:27,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 30 times [2018-10-02 11:40:27,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:27,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:27,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:27,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-10-02 11:40:27,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:27,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:27,685 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:28,141 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 158 check-sat command(s) [2018-10-02 11:40:28,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:28,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-10-02 11:40:28,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:28,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-02 11:40:28,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-02 11:40:28,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-02 11:40:28,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:40:28,289 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-10-02 11:40:28,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:28,604 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-10-02 11:40:28,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-02 11:40:28,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-10-02 11:40:28,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:28,607 INFO L225 Difference]: With dead ends: 353 [2018-10-02 11:40:28,607 INFO L226 Difference]: Without dead ends: 351 [2018-10-02 11:40:28,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-02 11:40:28,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-10-02 11:40:28,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-10-02 11:40:28,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-10-02 11:40:28,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-10-02 11:40:28,712 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-10-02 11:40:28,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:28,712 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-10-02 11:40:28,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-02 11:40:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-10-02 11:40:28,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-10-02 11:40:28,714 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:28,714 INFO L375 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-10-02 11:40:28,714 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:28,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:28,715 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 31 times [2018-10-02 11:40:28,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:28,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:28,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:28,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-02 11:40:29,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:29,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:29,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:29,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-02 11:40:29,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:29,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-02 11:40:29,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-02 11:40:29,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-02 11:40:29,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:40:29,906 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-10-02 11:40:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:30,164 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-10-02 11:40:30,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-02 11:40:30,164 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-10-02 11:40:30,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:30,166 INFO L225 Difference]: With dead ends: 365 [2018-10-02 11:40:30,166 INFO L226 Difference]: Without dead ends: 363 [2018-10-02 11:40:30,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-02 11:40:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-02 11:40:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-10-02 11:40:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-10-02 11:40:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-10-02 11:40:30,321 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-10-02 11:40:30,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:30,321 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-10-02 11:40:30,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-02 11:40:30,321 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-10-02 11:40:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-10-02 11:40:30,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:30,324 INFO L375 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-10-02 11:40:30,324 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:30,324 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:30,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 32 times [2018-10-02 11:40:30,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:30,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:30,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:30,326 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:30,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-10-02 11:40:31,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:31,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:31,090 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:31,283 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:31,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:31,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-10-02 11:40:31,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:31,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-02 11:40:31,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-02 11:40:31,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-02 11:40:31,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:40:31,469 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-10-02 11:40:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:32,083 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-10-02 11:40:32,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-02 11:40:32,083 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-10-02 11:40:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:32,085 INFO L225 Difference]: With dead ends: 377 [2018-10-02 11:40:32,085 INFO L226 Difference]: Without dead ends: 375 [2018-10-02 11:40:32,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-02 11:40:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-10-02 11:40:32,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-10-02 11:40:32,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-10-02 11:40:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-10-02 11:40:32,205 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-10-02 11:40:32,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:32,206 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-10-02 11:40:32,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-02 11:40:32,206 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-10-02 11:40:32,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-10-02 11:40:32,208 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:32,208 INFO L375 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-10-02 11:40:32,208 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:32,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 33 times [2018-10-02 11:40:32,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:32,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:32,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:32,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-02 11:40:32,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:32,881 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:32,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:33,453 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 181 check-sat command(s) [2018-10-02 11:40:33,454 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:33,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-10-02 11:40:33,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:33,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-02 11:40:33,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-02 11:40:33,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-02 11:40:33,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:40:33,650 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-10-02 11:40:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:33,912 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-10-02 11:40:33,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-02 11:40:33,912 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-10-02 11:40:33,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:33,914 INFO L225 Difference]: With dead ends: 389 [2018-10-02 11:40:33,915 INFO L226 Difference]: Without dead ends: 387 [2018-10-02 11:40:33,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-02 11:40:33,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-10-02 11:40:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-10-02 11:40:34,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-10-02 11:40:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-10-02 11:40:34,039 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-10-02 11:40:34,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:34,040 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-10-02 11:40:34,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-02 11:40:34,040 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-10-02 11:40:34,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-10-02 11:40:34,042 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:34,042 INFO L375 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-10-02 11:40:34,043 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:34,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:34,043 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 34 times [2018-10-02 11:40:34,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:34,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:34,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:34,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:34,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-10-02 11:40:35,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:35,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:35,014 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:35,220 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:35,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:35,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-10-02 11:40:35,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:35,358 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-02 11:40:35,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-02 11:40:35,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-02 11:40:35,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:40:35,359 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-10-02 11:40:35,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:35,657 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-10-02 11:40:35,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-02 11:40:35,657 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-10-02 11:40:35,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:35,659 INFO L225 Difference]: With dead ends: 401 [2018-10-02 11:40:35,659 INFO L226 Difference]: Without dead ends: 399 [2018-10-02 11:40:35,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-02 11:40:35,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-10-02 11:40:35,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-10-02 11:40:35,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-10-02 11:40:35,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-10-02 11:40:35,800 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-10-02 11:40:35,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:35,800 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-10-02 11:40:35,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-02 11:40:35,800 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-10-02 11:40:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-10-02 11:40:35,802 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:35,803 INFO L375 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-10-02 11:40:35,803 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:35,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:35,803 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 35 times [2018-10-02 11:40:35,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:35,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:35,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:35,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-10-02 11:40:36,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:36,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:36,564 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:37,195 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 193 check-sat command(s) [2018-10-02 11:40:37,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:37,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-10-02 11:40:37,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:37,383 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-02 11:40:37,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-02 11:40:37,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-02 11:40:37,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:40:37,384 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-10-02 11:40:37,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:37,680 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-10-02 11:40:37,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-02 11:40:37,681 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-10-02 11:40:37,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:37,682 INFO L225 Difference]: With dead ends: 413 [2018-10-02 11:40:37,682 INFO L226 Difference]: Without dead ends: 411 [2018-10-02 11:40:37,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-02 11:40:37,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-10-02 11:40:37,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-10-02 11:40:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-10-02 11:40:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-10-02 11:40:37,827 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-10-02 11:40:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:37,827 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-10-02 11:40:37,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-02 11:40:37,827 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-10-02 11:40:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-10-02 11:40:37,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:37,830 INFO L375 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-10-02 11:40:37,830 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:37,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:37,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 36 times [2018-10-02 11:40:37,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:37,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:37,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:37,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:37,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-10-02 11:40:38,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:38,564 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:38,571 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:39,213 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 195 check-sat command(s) [2018-10-02 11:40:39,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:39,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-10-02 11:40:39,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:39,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-02 11:40:39,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-02 11:40:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-02 11:40:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:40:39,373 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-10-02 11:40:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:39,713 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-10-02 11:40:39,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-02 11:40:39,715 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-10-02 11:40:39,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:39,717 INFO L225 Difference]: With dead ends: 425 [2018-10-02 11:40:39,718 INFO L226 Difference]: Without dead ends: 423 [2018-10-02 11:40:39,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-02 11:40:39,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-10-02 11:40:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-10-02 11:40:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-10-02 11:40:39,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-10-02 11:40:39,867 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-10-02 11:40:39,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:39,867 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-10-02 11:40:39,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-02 11:40:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-10-02 11:40:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-10-02 11:40:39,870 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:39,870 INFO L375 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-10-02 11:40:39,870 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:39,870 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 37 times [2018-10-02 11:40:39,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:39,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:39,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:39,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:39,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-10-02 11:40:40,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:40,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:40,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:40,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-10-02 11:40:41,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:41,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-02 11:40:41,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-02 11:40:41,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-02 11:40:41,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:40:41,134 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-10-02 11:40:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:41,495 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-10-02 11:40:41,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-02 11:40:41,495 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-10-02 11:40:41,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:41,497 INFO L225 Difference]: With dead ends: 437 [2018-10-02 11:40:41,497 INFO L226 Difference]: Without dead ends: 435 [2018-10-02 11:40:41,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-02 11:40:41,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-10-02 11:40:41,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-10-02 11:40:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-10-02 11:40:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-10-02 11:40:41,662 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-10-02 11:40:41,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:41,663 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-10-02 11:40:41,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-02 11:40:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-10-02 11:40:41,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-10-02 11:40:41,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:41,665 INFO L375 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-10-02 11:40:41,665 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:41,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:41,666 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 38 times [2018-10-02 11:40:41,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:41,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:41,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:41,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:41,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-10-02 11:40:42,720 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:42,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:42,728 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:42,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:42,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:42,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-10-02 11:40:43,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:43,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-02 11:40:43,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-02 11:40:43,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-02 11:40:43,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:40:43,222 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-10-02 11:40:44,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:44,081 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-10-02 11:40:44,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-02 11:40:44,082 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-10-02 11:40:44,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:44,083 INFO L225 Difference]: With dead ends: 449 [2018-10-02 11:40:44,084 INFO L226 Difference]: Without dead ends: 447 [2018-10-02 11:40:44,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-02 11:40:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-10-02 11:40:44,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-10-02 11:40:44,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-10-02 11:40:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-10-02 11:40:44,243 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-10-02 11:40:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:44,243 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-10-02 11:40:44,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-02 11:40:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-10-02 11:40:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-10-02 11:40:44,245 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:44,246 INFO L375 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-10-02 11:40:44,246 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:44,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:44,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 39 times [2018-10-02 11:40:44,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:44,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:44,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:44,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:44,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:44,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-02 11:40:45,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:45,357 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:45,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:40:46,125 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 217 check-sat command(s) [2018-10-02 11:40:46,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:46,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-10-02 11:40:46,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:46,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-02 11:40:46,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-02 11:40:46,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-02 11:40:46,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:40:46,316 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-10-02 11:40:46,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:46,666 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-10-02 11:40:46,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-02 11:40:46,667 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-10-02 11:40:46,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:46,668 INFO L225 Difference]: With dead ends: 461 [2018-10-02 11:40:46,668 INFO L226 Difference]: Without dead ends: 459 [2018-10-02 11:40:46,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-02 11:40:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-10-02 11:40:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-10-02 11:40:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-10-02 11:40:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-10-02 11:40:46,828 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-10-02 11:40:46,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:46,829 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-10-02 11:40:46,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-02 11:40:46,829 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-10-02 11:40:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-10-02 11:40:46,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:46,831 INFO L375 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-10-02 11:40:46,831 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:46,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 40 times [2018-10-02 11:40:46,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:46,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:46,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:46,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:46,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-10-02 11:40:48,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:48,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:48,008 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:40:48,249 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:40:48,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:48,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-10-02 11:40:48,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:48,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-02 11:40:48,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-02 11:40:48,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-02 11:40:48,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:40:48,420 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-10-02 11:40:48,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:48,842 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-10-02 11:40:48,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-02 11:40:48,847 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-10-02 11:40:48,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:48,849 INFO L225 Difference]: With dead ends: 473 [2018-10-02 11:40:48,849 INFO L226 Difference]: Without dead ends: 471 [2018-10-02 11:40:48,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-02 11:40:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-10-02 11:40:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-10-02 11:40:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-10-02 11:40:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-10-02 11:40:49,041 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-10-02 11:40:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:49,041 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-10-02 11:40:49,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-02 11:40:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-10-02 11:40:49,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-10-02 11:40:49,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:49,044 INFO L375 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-10-02 11:40:49,044 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:49,044 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 41 times [2018-10-02 11:40:49,045 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:49,045 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:49,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:49,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:49,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-10-02 11:40:50,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:50,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:50,063 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:40:50,900 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 229 check-sat command(s) [2018-10-02 11:40:50,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:50,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:51,089 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-10-02 11:40:51,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:51,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-02 11:40:51,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-02 11:40:51,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-02 11:40:51,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:40:51,113 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-10-02 11:40:51,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:51,695 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-10-02 11:40:51,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-02 11:40:51,696 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-10-02 11:40:51,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:51,697 INFO L225 Difference]: With dead ends: 485 [2018-10-02 11:40:51,697 INFO L226 Difference]: Without dead ends: 483 [2018-10-02 11:40:51,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-02 11:40:51,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-10-02 11:40:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-10-02 11:40:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-10-02 11:40:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-10-02 11:40:51,894 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-10-02 11:40:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:51,895 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-10-02 11:40:51,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-02 11:40:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-10-02 11:40:51,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-10-02 11:40:51,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:51,897 INFO L375 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-10-02 11:40:51,897 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:51,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:51,897 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 42 times [2018-10-02 11:40:51,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:51,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:51,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:51,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:51,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-02 11:40:53,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:53,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:53,032 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:40:53,889 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 230 check-sat command(s) [2018-10-02 11:40:53,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:53,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-10-02 11:40:54,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:54,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-02 11:40:54,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-02 11:40:54,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-02 11:40:54,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:40:54,072 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-10-02 11:40:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:54,486 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-10-02 11:40:54,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:40:54,487 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-10-02 11:40:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:54,489 INFO L225 Difference]: With dead ends: 497 [2018-10-02 11:40:54,489 INFO L226 Difference]: Without dead ends: 495 [2018-10-02 11:40:54,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-02 11:40:54,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-10-02 11:40:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-10-02 11:40:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-10-02 11:40:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-10-02 11:40:54,751 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-10-02 11:40:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:54,752 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-10-02 11:40:54,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-02 11:40:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-10-02 11:40:54,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-10-02 11:40:54,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:54,755 INFO L375 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-10-02 11:40:54,755 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:54,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:54,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 43 times [2018-10-02 11:40:54,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:54,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:54,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:54,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:54,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-10-02 11:40:56,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:56,004 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:56,011 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:56,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-10-02 11:40:56,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:56,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-02 11:40:56,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-02 11:40:56,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-02 11:40:56,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:40:56,494 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-10-02 11:40:56,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:56,934 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-10-02 11:40:56,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-02 11:40:56,934 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-10-02 11:40:56,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:56,936 INFO L225 Difference]: With dead ends: 509 [2018-10-02 11:40:56,936 INFO L226 Difference]: Without dead ends: 507 [2018-10-02 11:40:56,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-02 11:40:56,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-10-02 11:40:57,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-10-02 11:40:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-10-02 11:40:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-10-02 11:40:57,154 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-10-02 11:40:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:57,154 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-10-02 11:40:57,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-02 11:40:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-10-02 11:40:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-10-02 11:40:57,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:57,156 INFO L375 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-10-02 11:40:57,157 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:57,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 44 times [2018-10-02 11:40:57,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:57,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:57,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:57,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:40:57,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:40:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-10-02 11:40:58,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:40:58,142 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:40:58,149 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:40:58,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:40:58,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:40:58,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:40:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-10-02 11:40:58,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:40:58,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-02 11:40:58,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-02 11:40:58,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-02 11:40:58,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:40:58,611 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-10-02 11:40:59,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:40:59,073 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-10-02 11:40:59,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-02 11:40:59,074 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-10-02 11:40:59,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:40:59,076 INFO L225 Difference]: With dead ends: 521 [2018-10-02 11:40:59,076 INFO L226 Difference]: Without dead ends: 519 [2018-10-02 11:40:59,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-02 11:40:59,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-10-02 11:40:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-10-02 11:40:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-10-02 11:40:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-10-02 11:40:59,286 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-10-02 11:40:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:40:59,286 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-10-02 11:40:59,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-02 11:40:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-10-02 11:40:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-10-02 11:40:59,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:40:59,288 INFO L375 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-10-02 11:40:59,289 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:40:59,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:40:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 45 times [2018-10-02 11:40:59,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:40:59,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:40:59,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:59,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:40:59,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:40:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-10-02 11:41:00,412 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:00,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:00,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:01,551 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 253 check-sat command(s) [2018-10-02 11:41:01,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:01,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-10-02 11:41:01,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:01,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-02 11:41:01,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-02 11:41:01,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-02 11:41:01,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:41:01,830 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-10-02 11:41:02,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:02,627 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-10-02 11:41:02,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-02 11:41:02,631 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-10-02 11:41:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:02,633 INFO L225 Difference]: With dead ends: 533 [2018-10-02 11:41:02,633 INFO L226 Difference]: Without dead ends: 531 [2018-10-02 11:41:02,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-02 11:41:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-10-02 11:41:02,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-10-02 11:41:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-10-02 11:41:02,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-10-02 11:41:02,892 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-10-02 11:41:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:02,892 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-10-02 11:41:02,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-02 11:41:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-10-02 11:41:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-10-02 11:41:02,894 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:02,895 INFO L375 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-10-02 11:41:02,895 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:02,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:02,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 46 times [2018-10-02 11:41:02,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:02,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:02,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:02,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:02,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-10-02 11:41:03,887 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:03,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:03,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:04,183 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:04,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:04,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-10-02 11:41:04,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:04,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-02 11:41:04,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-02 11:41:04,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-02 11:41:04,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:41:04,402 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-10-02 11:41:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:05,033 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-10-02 11:41:05,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-02 11:41:05,036 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-10-02 11:41:05,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:05,038 INFO L225 Difference]: With dead ends: 545 [2018-10-02 11:41:05,038 INFO L226 Difference]: Without dead ends: 543 [2018-10-02 11:41:05,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-02 11:41:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-10-02 11:41:05,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-10-02 11:41:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-10-02 11:41:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-10-02 11:41:05,326 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-10-02 11:41:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:05,326 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-10-02 11:41:05,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-02 11:41:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-10-02 11:41:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-10-02 11:41:05,328 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:05,329 INFO L375 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-10-02 11:41:05,329 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:05,329 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:05,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 47 times [2018-10-02 11:41:05,329 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:05,329 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:05,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:05,330 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:05,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:05,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-10-02 11:41:06,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:06,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:06,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:07,485 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 265 check-sat command(s) [2018-10-02 11:41:07,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:07,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-10-02 11:41:07,715 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:07,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-02 11:41:07,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-02 11:41:07,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-02 11:41:07,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:41:07,717 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-10-02 11:41:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:08,341 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-10-02 11:41:08,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-02 11:41:08,342 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-10-02 11:41:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:08,344 INFO L225 Difference]: With dead ends: 557 [2018-10-02 11:41:08,344 INFO L226 Difference]: Without dead ends: 555 [2018-10-02 11:41:08,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-02 11:41:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-10-02 11:41:08,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-10-02 11:41:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-10-02 11:41:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-10-02 11:41:08,619 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-10-02 11:41:08,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:08,619 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-10-02 11:41:08,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-02 11:41:08,619 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-10-02 11:41:08,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-10-02 11:41:08,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:08,622 INFO L375 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-10-02 11:41:08,622 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:08,622 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:08,622 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 48 times [2018-10-02 11:41:08,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:08,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:08,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:08,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:08,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-10-02 11:41:09,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:09,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:09,790 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:10,965 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 267 check-sat command(s) [2018-10-02 11:41:10,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:10,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-10-02 11:41:11,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:11,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-02 11:41:11,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-02 11:41:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-02 11:41:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:41:11,201 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-10-02 11:41:11,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:11,735 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-10-02 11:41:11,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-02 11:41:11,735 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-10-02 11:41:11,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:11,737 INFO L225 Difference]: With dead ends: 569 [2018-10-02 11:41:11,737 INFO L226 Difference]: Without dead ends: 567 [2018-10-02 11:41:11,738 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-02 11:41:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-10-02 11:41:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-10-02 11:41:12,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-10-02 11:41:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-10-02 11:41:12,017 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-10-02 11:41:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:12,017 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-10-02 11:41:12,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-02 11:41:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-10-02 11:41:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-10-02 11:41:12,019 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:12,020 INFO L375 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-10-02 11:41:12,020 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:12,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:12,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 49 times [2018-10-02 11:41:12,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:12,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:12,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:12,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:12,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:13,174 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-10-02 11:41:13,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:13,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:13,181 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:13,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-10-02 11:41:13,759 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:13,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-02 11:41:13,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-02 11:41:13,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-02 11:41:13,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:41:13,760 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-10-02 11:41:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:14,317 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-10-02 11:41:14,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-02 11:41:14,317 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-10-02 11:41:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:14,320 INFO L225 Difference]: With dead ends: 581 [2018-10-02 11:41:14,320 INFO L226 Difference]: Without dead ends: 579 [2018-10-02 11:41:14,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-02 11:41:14,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-10-02 11:41:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-10-02 11:41:14,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-10-02 11:41:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-10-02 11:41:14,613 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-10-02 11:41:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:14,613 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-10-02 11:41:14,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-02 11:41:14,614 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-10-02 11:41:14,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-10-02 11:41:14,617 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:14,617 INFO L375 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-10-02 11:41:14,618 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:14,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:14,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 50 times [2018-10-02 11:41:14,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:14,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:14,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:14,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:14,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-10-02 11:41:16,207 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:16,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:16,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:16,522 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:16,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:16,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-10-02 11:41:16,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:16,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-02 11:41:16,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-02 11:41:16,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-02 11:41:16,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:41:16,760 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-10-02 11:41:17,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:17,342 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-10-02 11:41:17,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-02 11:41:17,342 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-10-02 11:41:17,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:17,344 INFO L225 Difference]: With dead ends: 593 [2018-10-02 11:41:17,345 INFO L226 Difference]: Without dead ends: 591 [2018-10-02 11:41:17,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-02 11:41:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-10-02 11:41:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-10-02 11:41:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-10-02 11:41:17,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-10-02 11:41:17,716 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-10-02 11:41:17,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:17,716 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-10-02 11:41:17,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-02 11:41:17,716 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-10-02 11:41:17,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-10-02 11:41:17,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:17,718 INFO L375 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-10-02 11:41:17,719 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:17,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:17,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 51 times [2018-10-02 11:41:17,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:17,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:17,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:17,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:17,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-10-02 11:41:18,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:18,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:18,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:20,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 289 check-sat command(s) [2018-10-02 11:41:20,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:20,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-10-02 11:41:20,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:20,542 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-02 11:41:20,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-02 11:41:20,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-02 11:41:20,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:41:20,544 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-10-02 11:41:21,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:21,075 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-10-02 11:41:21,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-02 11:41:21,075 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-10-02 11:41:21,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:21,077 INFO L225 Difference]: With dead ends: 605 [2018-10-02 11:41:21,077 INFO L226 Difference]: Without dead ends: 603 [2018-10-02 11:41:21,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-02 11:41:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-10-02 11:41:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-10-02 11:41:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-10-02 11:41:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-10-02 11:41:21,373 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-10-02 11:41:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:21,374 INFO L480 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-10-02 11:41:21,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-02 11:41:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-10-02 11:41:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-10-02 11:41:21,376 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:21,376 INFO L375 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-10-02 11:41:21,377 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:21,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:21,377 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 52 times [2018-10-02 11:41:21,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:21,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:21,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:21,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:21,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-10-02 11:41:22,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:22,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:22,675 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:23,005 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:23,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:23,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-10-02 11:41:23,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:23,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-02 11:41:23,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-02 11:41:23,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-02 11:41:23,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:41:23,268 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-10-02 11:41:23,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:23,880 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-10-02 11:41:23,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-02 11:41:23,880 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-10-02 11:41:23,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:23,882 INFO L225 Difference]: With dead ends: 617 [2018-10-02 11:41:23,883 INFO L226 Difference]: Without dead ends: 615 [2018-10-02 11:41:23,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-02 11:41:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-10-02 11:41:24,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-10-02 11:41:24,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-10-02 11:41:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-10-02 11:41:24,234 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-10-02 11:41:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:24,235 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-10-02 11:41:24,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-02 11:41:24,235 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-10-02 11:41:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-10-02 11:41:24,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:24,238 INFO L375 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-10-02 11:41:24,238 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:24,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:24,238 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 53 times [2018-10-02 11:41:24,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:24,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:24,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:24,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:24,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:24,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-10-02 11:41:25,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:25,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:25,670 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:27,023 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 301 check-sat command(s) [2018-10-02 11:41:27,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:27,034 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-10-02 11:41:27,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:27,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-02 11:41:27,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-02 11:41:27,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-02 11:41:27,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:41:27,287 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-10-02 11:41:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:27,932 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-10-02 11:41:27,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-02 11:41:27,933 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-10-02 11:41:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:27,935 INFO L225 Difference]: With dead ends: 629 [2018-10-02 11:41:27,935 INFO L226 Difference]: Without dead ends: 627 [2018-10-02 11:41:27,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:41:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-10-02 11:41:28,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-10-02 11:41:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-10-02 11:41:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-10-02 11:41:28,281 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-10-02 11:41:28,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:28,282 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-10-02 11:41:28,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-02 11:41:28,282 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-10-02 11:41:28,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-10-02 11:41:28,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:28,285 INFO L375 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-10-02 11:41:28,285 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:28,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 54 times [2018-10-02 11:41:28,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:28,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:28,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:28,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:28,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-10-02 11:41:29,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:29,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:29,685 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:31,113 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 302 check-sat command(s) [2018-10-02 11:41:31,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:31,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-10-02 11:41:31,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:31,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-02 11:41:31,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-02 11:41:31,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-02 11:41:31,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:41:31,541 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-10-02 11:41:32,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:32,237 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-10-02 11:41:32,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-02 11:41:32,237 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-10-02 11:41:32,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:32,239 INFO L225 Difference]: With dead ends: 641 [2018-10-02 11:41:32,239 INFO L226 Difference]: Without dead ends: 639 [2018-10-02 11:41:32,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-02 11:41:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-10-02 11:41:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-10-02 11:41:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-10-02 11:41:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-10-02 11:41:32,601 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-10-02 11:41:32,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:32,602 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-10-02 11:41:32,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-02 11:41:32,602 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-10-02 11:41:32,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-10-02 11:41:32,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:32,604 INFO L375 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-10-02 11:41:32,605 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:32,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:32,605 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 55 times [2018-10-02 11:41:32,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:32,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:32,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:32,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:32,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-10-02 11:41:34,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:34,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:34,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:34,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-10-02 11:41:34,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:34,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-02 11:41:34,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-02 11:41:34,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-02 11:41:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:41:34,737 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-10-02 11:41:35,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:35,409 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-10-02 11:41:35,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-02 11:41:35,410 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-10-02 11:41:35,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:35,412 INFO L225 Difference]: With dead ends: 653 [2018-10-02 11:41:35,412 INFO L226 Difference]: Without dead ends: 651 [2018-10-02 11:41:35,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-02 11:41:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-10-02 11:41:35,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-10-02 11:41:35,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-10-02 11:41:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-10-02 11:41:35,806 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-10-02 11:41:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:35,807 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-10-02 11:41:35,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-02 11:41:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-10-02 11:41:35,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-10-02 11:41:35,810 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:35,810 INFO L375 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-10-02 11:41:35,810 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:35,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:35,811 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 56 times [2018-10-02 11:41:35,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:35,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:35,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:35,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:35,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:37,342 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-10-02 11:41:37,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:37,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:37,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:41:37,686 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:41:37,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:37,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-10-02 11:41:37,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:37,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-02 11:41:37,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-02 11:41:37,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-02 11:41:38,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:41:38,000 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-10-02 11:41:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:38,782 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-10-02 11:41:38,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-02 11:41:38,782 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-10-02 11:41:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:38,784 INFO L225 Difference]: With dead ends: 665 [2018-10-02 11:41:38,784 INFO L226 Difference]: Without dead ends: 663 [2018-10-02 11:41:38,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-02 11:41:38,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-10-02 11:41:39,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-10-02 11:41:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-10-02 11:41:39,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-10-02 11:41:39,152 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-10-02 11:41:39,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:39,152 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-10-02 11:41:39,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-02 11:41:39,152 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-10-02 11:41:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-10-02 11:41:39,155 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:39,155 INFO L375 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-10-02 11:41:39,155 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:39,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:39,156 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 57 times [2018-10-02 11:41:39,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:39,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:39,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:39,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:39,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-02 11:41:40,718 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:40,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:40,725 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:41:42,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 325 check-sat command(s) [2018-10-02 11:41:42,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:42,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:42,651 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-10-02 11:41:42,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:42,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-02 11:41:42,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-02 11:41:42,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-02 11:41:42,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:41:42,676 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-10-02 11:41:43,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:43,440 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-10-02 11:41:43,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-02 11:41:43,440 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-10-02 11:41:43,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:43,443 INFO L225 Difference]: With dead ends: 677 [2018-10-02 11:41:43,443 INFO L226 Difference]: Without dead ends: 675 [2018-10-02 11:41:43,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-02 11:41:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-10-02 11:41:43,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-10-02 11:41:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-10-02 11:41:43,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-10-02 11:41:43,875 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-10-02 11:41:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:43,875 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-10-02 11:41:43,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-02 11:41:43,876 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-10-02 11:41:43,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-10-02 11:41:43,879 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:43,879 INFO L375 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-10-02 11:41:43,879 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:43,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 58 times [2018-10-02 11:41:43,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:43,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:43,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:43,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:43,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-10-02 11:41:45,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:45,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:45,507 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:41:45,871 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:41:45,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:45,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-10-02 11:41:46,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:46,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-02 11:41:46,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-02 11:41:46,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-02 11:41:46,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:41:46,195 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-10-02 11:41:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:46,989 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-10-02 11:41:46,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-02 11:41:46,989 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-10-02 11:41:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:46,991 INFO L225 Difference]: With dead ends: 689 [2018-10-02 11:41:46,992 INFO L226 Difference]: Without dead ends: 687 [2018-10-02 11:41:46,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-02 11:41:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-10-02 11:41:47,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-10-02 11:41:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-10-02 11:41:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-10-02 11:41:47,410 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-10-02 11:41:47,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:47,411 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-10-02 11:41:47,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-02 11:41:47,411 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-10-02 11:41:47,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-10-02 11:41:47,414 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:47,414 INFO L375 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-10-02 11:41:47,414 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:47,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:47,415 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 59 times [2018-10-02 11:41:47,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:47,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:47,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:47,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:47,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-02 11:41:49,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:49,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:49,100 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:41:50,831 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 337 check-sat command(s) [2018-10-02 11:41:50,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:50,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-10-02 11:41:51,173 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:51,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-02 11:41:51,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-02 11:41:51,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-02 11:41:51,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:41:51,175 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-10-02 11:41:51,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:51,932 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-10-02 11:41:51,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-02 11:41:51,932 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-10-02 11:41:51,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:51,935 INFO L225 Difference]: With dead ends: 701 [2018-10-02 11:41:51,935 INFO L226 Difference]: Without dead ends: 699 [2018-10-02 11:41:51,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-02 11:41:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-10-02 11:41:52,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-10-02 11:41:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-10-02 11:41:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-10-02 11:41:52,392 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-10-02 11:41:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:52,393 INFO L480 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-10-02 11:41:52,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-02 11:41:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-10-02 11:41:52,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-10-02 11:41:52,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:52,396 INFO L375 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-10-02 11:41:52,397 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:52,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 60 times [2018-10-02 11:41:52,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:52,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:52,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:52,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:52,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:54,148 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-10-02 11:41:54,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:54,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:54,155 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:41:55,932 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 339 check-sat command(s) [2018-10-02 11:41:55,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:41:55,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-10-02 11:41:56,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:41:56,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-02 11:41:56,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-02 11:41:56,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-02 11:41:56,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:41:56,281 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-10-02 11:41:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:41:57,070 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-10-02 11:41:57,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-02 11:41:57,071 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-10-02 11:41:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:41:57,073 INFO L225 Difference]: With dead ends: 713 [2018-10-02 11:41:57,073 INFO L226 Difference]: Without dead ends: 711 [2018-10-02 11:41:57,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-02 11:41:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-10-02 11:41:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-10-02 11:41:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-10-02 11:41:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-10-02 11:41:57,532 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-10-02 11:41:57,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:41:57,532 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-10-02 11:41:57,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-02 11:41:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-10-02 11:41:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-10-02 11:41:57,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:41:57,536 INFO L375 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-10-02 11:41:57,536 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:41:57,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:41:57,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 61 times [2018-10-02 11:41:57,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:41:57,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:41:57,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:57,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:41:57,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:41:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:59,259 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-10-02 11:41:59,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:41:59,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:41:59,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:41:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:41:59,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:41:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-10-02 11:42:00,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:00,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-02 11:42:00,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-02 11:42:00,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-02 11:42:00,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:42:00,007 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-10-02 11:42:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:00,887 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-10-02 11:42:00,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-02 11:42:00,887 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-10-02 11:42:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:00,890 INFO L225 Difference]: With dead ends: 725 [2018-10-02 11:42:00,890 INFO L226 Difference]: Without dead ends: 723 [2018-10-02 11:42:00,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-02 11:42:00,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-10-02 11:42:01,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-10-02 11:42:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-10-02 11:42:01,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-10-02 11:42:01,392 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-10-02 11:42:01,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:01,393 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-10-02 11:42:01,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-02 11:42:01,393 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-10-02 11:42:01,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-10-02 11:42:01,396 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:01,397 INFO L375 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-10-02 11:42:01,397 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:01,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:01,397 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 62 times [2018-10-02 11:42:01,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:01,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:01,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:01,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:01,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-10-02 11:42:03,370 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:03,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:03,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:42:03,769 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:42:03,769 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:03,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-10-02 11:42:04,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:04,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-02 11:42:04,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-02 11:42:04,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-02 11:42:04,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:42:04,143 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-10-02 11:42:05,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:05,042 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-10-02 11:42:05,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-02 11:42:05,043 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-10-02 11:42:05,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:05,045 INFO L225 Difference]: With dead ends: 737 [2018-10-02 11:42:05,045 INFO L226 Difference]: Without dead ends: 735 [2018-10-02 11:42:05,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-02 11:42:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-10-02 11:42:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-10-02 11:42:05,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-10-02 11:42:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-10-02 11:42:05,554 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-10-02 11:42:05,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:05,554 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-10-02 11:42:05,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-02 11:42:05,554 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-10-02 11:42:05,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-10-02 11:42:05,558 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:05,559 INFO L375 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-10-02 11:42:05,559 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:05,559 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:05,559 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 63 times [2018-10-02 11:42:05,559 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:05,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:05,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:05,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:05,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-10-02 11:42:07,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:07,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:07,771 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:42:09,777 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 361 check-sat command(s) [2018-10-02 11:42:09,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:09,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-10-02 11:42:10,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:10,167 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-02 11:42:10,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-02 11:42:10,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-02 11:42:10,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:42:10,168 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-10-02 11:42:11,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:11,411 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-10-02 11:42:11,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-02 11:42:11,411 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-10-02 11:42:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:11,415 INFO L225 Difference]: With dead ends: 749 [2018-10-02 11:42:11,415 INFO L226 Difference]: Without dead ends: 747 [2018-10-02 11:42:11,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-02 11:42:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-10-02 11:42:12,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-10-02 11:42:12,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-10-02 11:42:12,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-10-02 11:42:12,010 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-10-02 11:42:12,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:12,011 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-10-02 11:42:12,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-02 11:42:12,011 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-10-02 11:42:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-10-02 11:42:12,014 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:12,014 INFO L375 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-10-02 11:42:12,015 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:12,015 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:12,015 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 64 times [2018-10-02 11:42:12,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:12,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:12,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:12,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:12,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-10-02 11:42:13,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:13,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:13,895 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:42:14,295 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:42:14,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:14,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-10-02 11:42:14,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:14,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-02 11:42:14,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-02 11:42:14,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-02 11:42:14,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:42:14,689 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-10-02 11:42:15,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:15,676 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-10-02 11:42:15,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-02 11:42:15,676 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-10-02 11:42:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:15,679 INFO L225 Difference]: With dead ends: 761 [2018-10-02 11:42:15,679 INFO L226 Difference]: Without dead ends: 759 [2018-10-02 11:42:15,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-02 11:42:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-10-02 11:42:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-10-02 11:42:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-10-02 11:42:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-10-02 11:42:16,180 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-10-02 11:42:16,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:16,180 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-10-02 11:42:16,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-02 11:42:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-10-02 11:42:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-10-02 11:42:16,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:16,184 INFO L375 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-10-02 11:42:16,184 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:16,184 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:16,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 65 times [2018-10-02 11:42:16,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:16,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:16,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:16,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:16,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-10-02 11:42:18,456 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:18,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:18,465 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:42:20,646 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 373 check-sat command(s) [2018-10-02 11:42:20,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:20,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-10-02 11:42:21,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:21,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-02 11:42:21,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-02 11:42:21,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-02 11:42:21,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:42:21,058 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-10-02 11:42:22,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:22,021 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-10-02 11:42:22,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-02 11:42:22,021 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-10-02 11:42:22,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:22,024 INFO L225 Difference]: With dead ends: 773 [2018-10-02 11:42:22,024 INFO L226 Difference]: Without dead ends: 771 [2018-10-02 11:42:22,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 747 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-02 11:42:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-10-02 11:42:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-10-02 11:42:22,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-10-02 11:42:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-10-02 11:42:22,549 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-10-02 11:42:22,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:22,550 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-10-02 11:42:22,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-02 11:42:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-10-02 11:42:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-10-02 11:42:22,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:22,553 INFO L375 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-10-02 11:42:22,554 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:22,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 66 times [2018-10-02 11:42:22,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:22,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:22,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:22,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:22,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-10-02 11:42:24,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:24,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:24,552 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:42:26,830 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 374 check-sat command(s) [2018-10-02 11:42:26,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:26,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-10-02 11:42:27,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:27,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-02 11:42:27,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-02 11:42:27,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-02 11:42:27,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:42:27,239 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-10-02 11:42:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:28,248 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-10-02 11:42:28,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-02 11:42:28,248 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-10-02 11:42:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:28,251 INFO L225 Difference]: With dead ends: 785 [2018-10-02 11:42:28,251 INFO L226 Difference]: Without dead ends: 783 [2018-10-02 11:42:28,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-02 11:42:28,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-10-02 11:42:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-10-02 11:42:28,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-10-02 11:42:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-10-02 11:42:28,799 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-10-02 11:42:28,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:28,800 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-10-02 11:42:28,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-02 11:42:28,800 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-10-02 11:42:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-10-02 11:42:28,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:28,804 INFO L375 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-10-02 11:42:28,804 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:28,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:28,805 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 67 times [2018-10-02 11:42:28,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:28,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:28,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:28,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:28,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-10-02 11:42:30,951 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:30,951 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:30,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:31,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:31,792 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-10-02 11:42:31,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:31,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-02 11:42:31,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-02 11:42:31,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-02 11:42:31,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:42:31,816 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-10-02 11:42:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:32,758 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-10-02 11:42:32,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-02 11:42:32,759 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-10-02 11:42:32,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:32,762 INFO L225 Difference]: With dead ends: 797 [2018-10-02 11:42:32,762 INFO L226 Difference]: Without dead ends: 795 [2018-10-02 11:42:32,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-02 11:42:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-10-02 11:42:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-10-02 11:42:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-10-02 11:42:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-10-02 11:42:33,353 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-10-02 11:42:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:33,353 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-10-02 11:42:33,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-02 11:42:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-10-02 11:42:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-10-02 11:42:33,357 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:33,357 INFO L375 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-10-02 11:42:33,357 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:33,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:33,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 68 times [2018-10-02 11:42:33,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:33,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:33,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:33,359 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:42:33,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-10-02 11:42:35,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:35,476 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:35,483 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:42:35,909 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:42:35,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:35,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-10-02 11:42:36,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:36,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-02 11:42:36,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-02 11:42:36,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-02 11:42:36,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:42:36,411 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-10-02 11:42:37,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:37,498 INFO L93 Difference]: Finished difference Result 809 states and 876 transitions. [2018-10-02 11:42:37,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-02 11:42:37,499 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 783 [2018-10-02 11:42:37,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:37,501 INFO L225 Difference]: With dead ends: 809 [2018-10-02 11:42:37,501 INFO L226 Difference]: Without dead ends: 807 [2018-10-02 11:42:37,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-02 11:42:37,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2018-10-02 11:42:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 796. [2018-10-02 11:42:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-10-02 11:42:38,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 862 transitions. [2018-10-02 11:42:38,101 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 862 transitions. Word has length 783 [2018-10-02 11:42:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:38,101 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 862 transitions. [2018-10-02 11:42:38,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-02 11:42:38,101 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 862 transitions. [2018-10-02 11:42:38,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-10-02 11:42:38,105 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:38,105 INFO L375 BasicCegarLoop]: trace histogram [660, 66, 66, 1, 1, 1] [2018-10-02 11:42:38,105 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:38,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:38,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1533429993, now seen corresponding path program 69 times [2018-10-02 11:42:38,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:38,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:38,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:38,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:38,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-10-02 11:42:40,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:40,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:40,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:42:42,762 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 397 check-sat command(s) [2018-10-02 11:42:42,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:42,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:43,227 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-10-02 11:42:43,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:43,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-02 11:42:43,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-02 11:42:43,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-02 11:42:43,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:42:43,252 INFO L87 Difference]: Start difference. First operand 796 states and 862 transitions. Second operand 69 states. [2018-10-02 11:42:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:44,344 INFO L93 Difference]: Finished difference Result 821 states and 889 transitions. [2018-10-02 11:42:44,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-02 11:42:44,345 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 795 [2018-10-02 11:42:44,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:44,347 INFO L225 Difference]: With dead ends: 821 [2018-10-02 11:42:44,348 INFO L226 Difference]: Without dead ends: 819 [2018-10-02 11:42:44,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-02 11:42:44,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-10-02 11:42:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 808. [2018-10-02 11:42:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-10-02 11:42:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 875 transitions. [2018-10-02 11:42:44,970 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 875 transitions. Word has length 795 [2018-10-02 11:42:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:44,971 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 875 transitions. [2018-10-02 11:42:44,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-02 11:42:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 875 transitions. [2018-10-02 11:42:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-10-02 11:42:44,975 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:44,975 INFO L375 BasicCegarLoop]: trace histogram [670, 67, 67, 1, 1, 1] [2018-10-02 11:42:44,975 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:44,976 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:44,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1888751713, now seen corresponding path program 70 times [2018-10-02 11:42:44,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:44,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:44,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:44,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:44,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-10-02 11:42:47,254 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:47,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:47,262 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:42:47,707 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:42:47,707 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:47,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-10-02 11:42:48,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:48,152 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-02 11:42:48,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-02 11:42:48,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-02 11:42:48,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:42:48,153 INFO L87 Difference]: Start difference. First operand 808 states and 875 transitions. Second operand 70 states. [2018-10-02 11:42:49,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:49,331 INFO L93 Difference]: Finished difference Result 833 states and 902 transitions. [2018-10-02 11:42:49,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-02 11:42:49,331 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 807 [2018-10-02 11:42:49,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:49,334 INFO L225 Difference]: With dead ends: 833 [2018-10-02 11:42:49,334 INFO L226 Difference]: Without dead ends: 831 [2018-10-02 11:42:49,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-02 11:42:49,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-10-02 11:42:49,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2018-10-02 11:42:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-10-02 11:42:49,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 888 transitions. [2018-10-02 11:42:49,987 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 888 transitions. Word has length 807 [2018-10-02 11:42:49,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:49,987 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 888 transitions. [2018-10-02 11:42:49,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-02 11:42:49,988 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 888 transitions. [2018-10-02 11:42:49,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-10-02 11:42:49,992 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:49,992 INFO L375 BasicCegarLoop]: trace histogram [680, 68, 68, 1, 1, 1] [2018-10-02 11:42:49,992 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:49,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:49,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353109, now seen corresponding path program 71 times [2018-10-02 11:42:49,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:49,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:49,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:49,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:49,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:42:52,379 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-10-02 11:42:52,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:42:52,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:42:52,388 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:42:55,101 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 409 check-sat command(s) [2018-10-02 11:42:55,101 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:42:55,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:42:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-10-02 11:42:55,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:42:55,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-02 11:42:55,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-02 11:42:55,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-02 11:42:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:42:55,617 INFO L87 Difference]: Start difference. First operand 820 states and 888 transitions. Second operand 71 states. [2018-10-02 11:42:56,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:42:56,753 INFO L93 Difference]: Finished difference Result 845 states and 915 transitions. [2018-10-02 11:42:56,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-02 11:42:56,754 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 819 [2018-10-02 11:42:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:42:56,757 INFO L225 Difference]: With dead ends: 845 [2018-10-02 11:42:56,757 INFO L226 Difference]: Without dead ends: 843 [2018-10-02 11:42:56,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 819 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-02 11:42:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2018-10-02 11:42:57,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 832. [2018-10-02 11:42:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2018-10-02 11:42:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 901 transitions. [2018-10-02 11:42:57,472 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 901 transitions. Word has length 819 [2018-10-02 11:42:57,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:42:57,472 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 901 transitions. [2018-10-02 11:42:57,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-02 11:42:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 901 transitions. [2018-10-02 11:42:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-10-02 11:42:57,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:42:57,477 INFO L375 BasicCegarLoop]: trace histogram [690, 69, 69, 1, 1, 1] [2018-10-02 11:42:57,477 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:42:57,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:42:57,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1822005771, now seen corresponding path program 72 times [2018-10-02 11:42:57,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:42:57,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:42:57,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:57,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:42:57,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:42:57,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-10-02 11:43:00,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:00,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:00,152 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:02,786 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 411 check-sat command(s) [2018-10-02 11:43:02,787 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:02,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-10-02 11:43:03,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:03,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-02 11:43:03,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-02 11:43:03,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-02 11:43:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:43:03,402 INFO L87 Difference]: Start difference. First operand 832 states and 901 transitions. Second operand 72 states. [2018-10-02 11:43:04,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:04,590 INFO L93 Difference]: Finished difference Result 857 states and 928 transitions. [2018-10-02 11:43:04,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-02 11:43:04,590 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 831 [2018-10-02 11:43:04,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:04,593 INFO L225 Difference]: With dead ends: 857 [2018-10-02 11:43:04,593 INFO L226 Difference]: Without dead ends: 855 [2018-10-02 11:43:04,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-02 11:43:04,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2018-10-02 11:43:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 844. [2018-10-02 11:43:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-10-02 11:43:05,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 914 transitions. [2018-10-02 11:43:05,342 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 914 transitions. Word has length 831 [2018-10-02 11:43:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:05,343 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 914 transitions. [2018-10-02 11:43:05,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-02 11:43:05,343 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 914 transitions. [2018-10-02 11:43:05,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-10-02 11:43:05,347 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:05,348 INFO L375 BasicCegarLoop]: trace histogram [700, 70, 70, 1, 1, 1] [2018-10-02 11:43:05,348 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:05,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:05,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1902862911, now seen corresponding path program 73 times [2018-10-02 11:43:05,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:05,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:05,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:05,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:05,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-10-02 11:43:07,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:07,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:07,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:08,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-10-02 11:43:08,846 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:08,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-02 11:43:08,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-02 11:43:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-02 11:43:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:43:08,848 INFO L87 Difference]: Start difference. First operand 844 states and 914 transitions. Second operand 73 states. [2018-10-02 11:43:10,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:10,071 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2018-10-02 11:43:10,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-02 11:43:10,071 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 843 [2018-10-02 11:43:10,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:10,073 INFO L225 Difference]: With dead ends: 869 [2018-10-02 11:43:10,073 INFO L226 Difference]: Without dead ends: 867 [2018-10-02 11:43:10,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-02 11:43:10,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-10-02 11:43:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 856. [2018-10-02 11:43:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2018-10-02 11:43:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 927 transitions. [2018-10-02 11:43:10,849 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 927 transitions. Word has length 843 [2018-10-02 11:43:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:10,849 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 927 transitions. [2018-10-02 11:43:10,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-02 11:43:10,850 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 927 transitions. [2018-10-02 11:43:10,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2018-10-02 11:43:10,854 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:10,854 INFO L375 BasicCegarLoop]: trace histogram [710, 71, 71, 1, 1, 1] [2018-10-02 11:43:10,855 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:10,855 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:10,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1438007177, now seen corresponding path program 74 times [2018-10-02 11:43:10,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:10,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:10,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:10,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:10,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-10-02 11:43:13,405 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:13,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:13,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:43:13,879 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:43:13,880 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:13,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:14,427 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-10-02 11:43:14,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:14,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-02 11:43:14,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-02 11:43:14,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-02 11:43:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:43:14,451 INFO L87 Difference]: Start difference. First operand 856 states and 927 transitions. Second operand 74 states. [2018-10-02 11:43:15,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:15,716 INFO L93 Difference]: Finished difference Result 881 states and 954 transitions. [2018-10-02 11:43:15,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-02 11:43:15,716 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 855 [2018-10-02 11:43:15,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:15,717 INFO L225 Difference]: With dead ends: 881 [2018-10-02 11:43:15,717 INFO L226 Difference]: Without dead ends: 879 [2018-10-02 11:43:15,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-02 11:43:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-10-02 11:43:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 868. [2018-10-02 11:43:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2018-10-02 11:43:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 940 transitions. [2018-10-02 11:43:16,523 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 940 transitions. Word has length 855 [2018-10-02 11:43:16,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:16,524 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 940 transitions. [2018-10-02 11:43:16,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-02 11:43:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 940 transitions. [2018-10-02 11:43:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-10-02 11:43:16,529 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:16,529 INFO L375 BasicCegarLoop]: trace histogram [720, 72, 72, 1, 1, 1] [2018-10-02 11:43:16,529 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:16,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:16,530 INFO L82 PathProgramCache]: Analyzing trace with hash 696090067, now seen corresponding path program 75 times [2018-10-02 11:43:16,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:16,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:16,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:16,531 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:16,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-10-02 11:43:19,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:19,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:19,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:43:22,290 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 433 check-sat command(s) [2018-10-02 11:43:22,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:22,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-10-02 11:43:22,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:22,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-02 11:43:22,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-02 11:43:22,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-02 11:43:22,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:43:22,806 INFO L87 Difference]: Start difference. First operand 868 states and 940 transitions. Second operand 75 states. [2018-10-02 11:43:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:24,016 INFO L93 Difference]: Finished difference Result 893 states and 967 transitions. [2018-10-02 11:43:24,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-02 11:43:24,016 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 867 [2018-10-02 11:43:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:24,018 INFO L225 Difference]: With dead ends: 893 [2018-10-02 11:43:24,018 INFO L226 Difference]: Without dead ends: 891 [2018-10-02 11:43:24,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-02 11:43:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-10-02 11:43:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2018-10-02 11:43:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-10-02 11:43:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 953 transitions. [2018-10-02 11:43:24,770 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 953 transitions. Word has length 867 [2018-10-02 11:43:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:24,771 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 953 transitions. [2018-10-02 11:43:24,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-02 11:43:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 953 transitions. [2018-10-02 11:43:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2018-10-02 11:43:24,776 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:24,776 INFO L375 BasicCegarLoop]: trace histogram [730, 73, 73, 1, 1, 1] [2018-10-02 11:43:24,776 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:24,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:24,777 INFO L82 PathProgramCache]: Analyzing trace with hash 943168797, now seen corresponding path program 76 times [2018-10-02 11:43:24,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:24,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:24,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:24,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:24,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-10-02 11:43:27,447 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:27,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:43:27,453 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:43:27,948 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:43:27,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:27,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:28,477 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-10-02 11:43:28,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:28,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-02 11:43:28,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-02 11:43:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-02 11:43:28,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:43:28,501 INFO L87 Difference]: Start difference. First operand 880 states and 953 transitions. Second operand 76 states. [2018-10-02 11:43:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:29,765 INFO L93 Difference]: Finished difference Result 905 states and 980 transitions. [2018-10-02 11:43:29,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-02 11:43:29,765 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 879 [2018-10-02 11:43:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:29,767 INFO L225 Difference]: With dead ends: 905 [2018-10-02 11:43:29,767 INFO L226 Difference]: Without dead ends: 903 [2018-10-02 11:43:29,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 879 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-02 11:43:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2018-10-02 11:43:30,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 892. [2018-10-02 11:43:30,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-10-02 11:43:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 966 transitions. [2018-10-02 11:43:30,559 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 966 transitions. Word has length 879 [2018-10-02 11:43:30,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:30,559 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 966 transitions. [2018-10-02 11:43:30,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-02 11:43:30,560 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 966 transitions. [2018-10-02 11:43:30,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2018-10-02 11:43:30,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:30,564 INFO L375 BasicCegarLoop]: trace histogram [740, 74, 74, 1, 1, 1] [2018-10-02 11:43:30,565 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:30,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:30,565 INFO L82 PathProgramCache]: Analyzing trace with hash -811917977, now seen corresponding path program 77 times [2018-10-02 11:43:30,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:30,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:30,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:30,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:30,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-10-02 11:43:33,317 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:33,317 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 [2018-10-02 11:43:33,323 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:43:36,470 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 445 check-sat command(s) [2018-10-02 11:43:36,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:36,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-10-02 11:43:37,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:37,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-02 11:43:37,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-02 11:43:37,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-02 11:43:37,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:43:37,024 INFO L87 Difference]: Start difference. First operand 892 states and 966 transitions. Second operand 77 states. [2018-10-02 11:43:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:38,380 INFO L93 Difference]: Finished difference Result 917 states and 993 transitions. [2018-10-02 11:43:38,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-02 11:43:38,380 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 891 [2018-10-02 11:43:38,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:38,382 INFO L225 Difference]: With dead ends: 917 [2018-10-02 11:43:38,382 INFO L226 Difference]: Without dead ends: 915 [2018-10-02 11:43:38,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-02 11:43:38,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-10-02 11:43:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 904. [2018-10-02 11:43:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2018-10-02 11:43:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 979 transitions. [2018-10-02 11:43:39,204 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 979 transitions. Word has length 891 [2018-10-02 11:43:39,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:39,205 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 979 transitions. [2018-10-02 11:43:39,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-02 11:43:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 979 transitions. [2018-10-02 11:43:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-10-02 11:43:39,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:39,211 INFO L375 BasicCegarLoop]: trace histogram [750, 75, 75, 1, 1, 1] [2018-10-02 11:43:39,211 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:39,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:39,212 INFO L82 PathProgramCache]: Analyzing trace with hash -543261007, now seen corresponding path program 78 times [2018-10-02 11:43:39,212 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:39,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:39,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:39,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:39,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-10-02 11:43:42,042 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:42,042 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 [2018-10-02 11:43:42,050 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:43:45,153 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 446 check-sat command(s) [2018-10-02 11:43:45,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:43:45,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-10-02 11:43:45,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:45,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-02 11:43:45,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-02 11:43:45,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-02 11:43:45,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:43:45,764 INFO L87 Difference]: Start difference. First operand 904 states and 979 transitions. Second operand 78 states. [2018-10-02 11:43:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:47,067 INFO L93 Difference]: Finished difference Result 929 states and 1006 transitions. [2018-10-02 11:43:47,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-02 11:43:47,068 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 903 [2018-10-02 11:43:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:47,069 INFO L225 Difference]: With dead ends: 929 [2018-10-02 11:43:47,069 INFO L226 Difference]: Without dead ends: 927 [2018-10-02 11:43:47,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 903 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-02 11:43:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2018-10-02 11:43:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 916. [2018-10-02 11:43:47,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2018-10-02 11:43:47,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 992 transitions. [2018-10-02 11:43:47,952 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 992 transitions. Word has length 903 [2018-10-02 11:43:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:43:47,952 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 992 transitions. [2018-10-02 11:43:47,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-02 11:43:47,953 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 992 transitions. [2018-10-02 11:43:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-10-02 11:43:47,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:43:47,958 INFO L375 BasicCegarLoop]: trace histogram [760, 76, 76, 1, 1, 1] [2018-10-02 11:43:47,958 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:43:47,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:43:47,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1703395077, now seen corresponding path program 79 times [2018-10-02 11:43:47,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:43:47,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:43:47,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:47,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:43:47,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:43:48,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 351956 backedges. 0 proven. 347776 refuted. 0 times theorem prover too weak. 4180 trivial. 0 not checked. [2018-10-02 11:43:51,140 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:43:51,140 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 [2018-10-02 11:43:51,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:43:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:43:51,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:43:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 351956 backedges. 0 proven. 347776 refuted. 0 times theorem prover too weak. 4180 trivial. 0 not checked. [2018-10-02 11:43:52,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:43:52,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-02 11:43:52,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-02 11:43:52,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-02 11:43:52,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:43:52,225 INFO L87 Difference]: Start difference. First operand 916 states and 992 transitions. Second operand 79 states. [2018-10-02 11:43:53,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:43:53,648 INFO L93 Difference]: Finished difference Result 941 states and 1019 transitions. [2018-10-02 11:43:53,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-02 11:43:53,648 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 915 [2018-10-02 11:43:53,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:43:53,650 INFO L225 Difference]: With dead ends: 941 [2018-10-02 11:43:53,650 INFO L226 Difference]: Without dead ends: 939 [2018-10-02 11:43:53,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-02 11:43:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. Received shutdown request... [2018-10-02 11:43:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 928. [2018-10-02 11:43:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 928 states. [2018-10-02 11:43:54,519 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-02 11:43:54,525 WARN L205 ceAbstractionStarter]: Timeout [2018-10-02 11:43:54,525 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.10 11:43:54 BoogieIcfgContainer [2018-10-02 11:43:54,525 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-02 11:43:54,526 INFO L168 Benchmark]: Toolchain (without parser) took 247159.89 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.5 GB in the beginning and 935.1 MB in the end (delta: 535.8 MB). Peak memory consumption was 2.6 GB. Max. memory is 7.1 GB. [2018-10-02 11:43:54,528 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:43:54,529 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.71 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:43:54,529 INFO L168 Benchmark]: Boogie Preprocessor took 24.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:43:54,529 INFO L168 Benchmark]: RCFGBuilder took 301.12 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-02 11:43:54,530 INFO L168 Benchmark]: TraceAbstraction took 246784.55 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 935.1 MB in the end (delta: 514.6 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. [2018-10-02 11:43:54,532 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.71 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.89 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 301.12 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 246784.55 ms. Allocated memory was 1.5 GB in the beginning and 3.6 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 935.1 MB in the end (delta: 514.6 MB). Peak memory consumption was 2.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 35]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 35). Cancelled while ReachableStatesComputation was computing reachable states (1 states constructedinput type DoubleDeckerAutomaton). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 246.7s OverallTime, 81 OverallIterations, 760 TraceHistogramMax, 53.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 322 SDtfs, 6000 SDslu, 4360 SDs, 0 SdLazy, 7596 SolverSat, 461 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38567 GetRequests, 35300 SyntacticMatches, 0 SemanticMatches, 3267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5190 ImplicationChecksByTransitivity, 80.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=916occurred in iteration=80, 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: 22.2s AutomataMinimizationTime, 81 MinimizatonAttempts, 807 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 4.3s SsaConstructionTime, 52.5s SatisfiabilityAnalysisTime, 96.7s InterpolantComputationTime, 70670 NumberOfCodeBlocks, 70499 NumberOfCodeBlocksAsserted, 8914 NumberOfCheckSat, 70510 ConstructedInterpolants, 0 QuantifiedInterpolants, 129595912 SizeOfPredicates, 79 NumberOfNonLiveVariables, 141266 ConjunctsInSsa, 3108 ConjunctsInUnsatCore, 160 InterpolantComputations, 2 PerfectInterpolantSequences, 324343/18173289 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-02_11-43-54-549.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-02_11-43-54-549.csv Completed graceful shutdown