java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:21:40,150 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:21:40,152 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:21:40,164 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:21:40,165 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:21:40,166 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:21:40,167 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:21:40,169 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:21:40,170 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:21:40,171 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:21:40,172 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 21:21:40,196 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:21:40,221 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:21:40,222 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:21:40,226 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:21:40,226 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:21:40,227 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:21:40,227 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:21:40,227 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:21:40,228 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:21:40,228 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:21:40,229 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:21:40,229 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:21:40,229 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:21:40,229 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:21:40,229 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:21:40,230 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:21:40,230 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:21:40,230 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:21:40,230 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:21:40,232 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:21:40,232 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:21:40,232 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:21:40,232 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:21:40,232 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:21:40,233 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:21:40,233 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:21:40,233 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:21:40,233 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:21:40,233 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:21:40,234 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:21:40,234 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:21:40,295 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:21:40,309 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:21:40,315 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:21:40,316 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:21:40,317 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:21:40,318 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-23 21:21:40,318 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-09-23 21:21:40,380 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:21:40,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:21:40,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:21:40,385 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:21:40,385 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:21:40,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:40" (1/1) ... [2018-09-23 21:21:40,420 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:40" (1/1) ... [2018-09-23 21:21:40,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:21:40,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:21:40,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:21:40,428 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:21:40,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:40" (1/1) ... [2018-09-23 21:21:40,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:40" (1/1) ... [2018-09-23 21:21:40,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:40" (1/1) ... [2018-09-23 21:21:40,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:40" (1/1) ... [2018-09-23 21:21:40,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:40" (1/1) ... [2018-09-23 21:21:40,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:40" (1/1) ... [2018-09-23 21:21:40,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:40" (1/1) ... [2018-09-23 21:21:40,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:21:40,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:21:40,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:21:40,453 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:21:40,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:21:40,534 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-23 21:21:40,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:21:40,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:21:40,699 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:21:40,699 INFO L202 PluginConnector]: Adding new model fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:21:40 BoogieIcfgContainer [2018-09-23 21:21:40,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:21:40,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:21:40,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:21:40,704 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:21:40,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:21:40" (1/2) ... [2018-09-23 21:21:40,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ce1e0a and model type fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:21:40, skipping insertion in model container [2018-09-23 21:21:40,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:21:40" (2/2) ... [2018-09-23 21:21:40,708 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-23 21:21:40,718 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:21:40,726 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:21:40,777 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:21:40,777 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:21:40,778 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:21:40,778 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:21:40,778 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:21:40,778 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:21:40,778 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:21:40,779 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:21:40,779 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:21:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-23 21:21:40,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:21:40,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:40,815 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:40,820 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:40,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:40,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1807861163, now seen corresponding path program 1 times [2018-09-23 21:21:40,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:40,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:40,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:40,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:40,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:40,978 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:21:40,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:21:40,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:21:40,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:21:40,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:21:40,999 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-23 21:21:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:41,043 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2018-09-23 21:21:41,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:21:41,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-23 21:21:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:41,057 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:21:41,058 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 21:21:41,062 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:21:41,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 21:21:41,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 21:21:41,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:21:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2018-09-23 21:21:41,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2018-09-23 21:21:41,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:41,100 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2018-09-23 21:21:41,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:21:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2018-09-23 21:21:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 21:21:41,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:41,101 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:41,102 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:41,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:41,102 INFO L82 PathProgramCache]: Analyzing trace with hash 89245487, now seen corresponding path program 1 times [2018-09-23 21:21:41,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:41,102 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:41,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:41,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:41,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:41,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:41,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:41,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:41,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:41,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:21:41,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:21:41,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:21:41,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:21:41,353 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 4 states. [2018-09-23 21:21:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:41,395 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2018-09-23 21:21:41,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:21:41,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-09-23 21:21:41,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:41,396 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:21:41,396 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 21:21:41,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:21:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 21:21:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 21:21:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 21:21:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-09-23 21:21:41,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-09-23 21:21:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:41,402 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-09-23 21:21:41,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:21:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-09-23 21:21:41,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:21:41,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:41,403 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:41,403 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:41,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:41,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2061989811, now seen corresponding path program 2 times [2018-09-23 21:21:41,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:41,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:41,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:41,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:41,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:41,525 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:21:41,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 21:21:41,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:21:41,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:21:41,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:21:41,526 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 5 states. [2018-09-23 21:21:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:41,618 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2018-09-23 21:21:41,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:21:41,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-09-23 21:21:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:41,620 INFO L225 Difference]: With dead ends: 32 [2018-09-23 21:21:41,620 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:21:41,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:21:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:21:41,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2018-09-23 21:21:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:21:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-09-23 21:21:41,629 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2018-09-23 21:21:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:41,629 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2018-09-23 21:21:41,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:21:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2018-09-23 21:21:41,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:21:41,630 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:41,630 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 21:21:41,631 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:41,631 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:41,631 INFO L82 PathProgramCache]: Analyzing trace with hash 2062049393, now seen corresponding path program 1 times [2018-09-23 21:21:41,631 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:41,631 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:41,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:41,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 21:21:41,677 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:21:41,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-23 21:21:41,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:21:41,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:21:41,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:21:41,679 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2018-09-23 21:21:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:41,791 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2018-09-23 21:21:41,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:21:41,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2018-09-23 21:21:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:41,795 INFO L225 Difference]: With dead ends: 26 [2018-09-23 21:21:41,795 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 21:21:41,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:21:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 21:21:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2018-09-23 21:21:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:21:41,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-23 21:21:41,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2018-09-23 21:21:41,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:41,811 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-23 21:21:41,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:21:41,811 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-23 21:21:41,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:21:41,812 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:41,812 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2018-09-23 21:21:41,813 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:41,813 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:41,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1980186676, now seen corresponding path program 1 times [2018-09-23 21:21:41,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:41,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:41,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:41,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:41,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:41,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:41,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:42,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:42,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:42,036 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:21:42,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:21:42,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:21:42,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:21:42,038 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2018-09-23 21:21:42,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:42,099 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2018-09-23 21:21:42,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:21:42,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-09-23 21:21:42,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:42,102 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:21:42,102 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:21:42,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:21:42,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:21:42,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:21:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:21:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2018-09-23 21:21:42,109 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2018-09-23 21:21:42,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:42,109 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2018-09-23 21:21:42,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:21:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2018-09-23 21:21:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:21:42,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:42,111 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:42,111 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:42,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:42,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1317950664, now seen corresponding path program 2 times [2018-09-23 21:21:42,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:42,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:42,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:42,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:42,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:42,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 21:21:42,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:42,325 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:42,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:42,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:42,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:42,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:21:42,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:21:42,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:21:42,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:21:42,386 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2018-09-23 21:21:42,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:42,495 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2018-09-23 21:21:42,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:21:42,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2018-09-23 21:21:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:42,500 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:21:42,500 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:21:42,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:21:42,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:21:42,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:21:42,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:21:42,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-23 21:21:42,513 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2018-09-23 21:21:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:42,514 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-23 21:21:42,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:21:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-23 21:21:42,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:21:42,515 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:42,515 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:42,516 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:42,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:42,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1142069956, now seen corresponding path program 3 times [2018-09-23 21:21:42,516 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:42,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:42,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:42,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:42,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:42,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:42,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:42,740 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-09-23 21:21:42,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:42,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:42,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:42,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:21:42,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:21:42,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:21:42,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:21:42,772 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2018-09-23 21:21:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:42,817 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2018-09-23 21:21:42,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:21:42,821 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2018-09-23 21:21:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:42,822 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:21:42,822 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:21:42,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:21:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:21:42,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:21:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:21:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2018-09-23 21:21:42,830 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2018-09-23 21:21:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:42,831 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2018-09-23 21:21:42,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:21:42,831 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2018-09-23 21:21:42,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:21:42,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:42,832 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:42,833 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:42,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:42,833 INFO L82 PathProgramCache]: Analyzing trace with hash -375565888, now seen corresponding path program 4 times [2018-09-23 21:21:42,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:42,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:42,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:42,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:43,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:43,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:43,076 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:43,126 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:43,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:43,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:43,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:43,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:21:43,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:21:43,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:21:43,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:21:43,160 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2018-09-23 21:21:43,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:43,252 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-09-23 21:21:43,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:21:43,253 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-09-23 21:21:43,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:43,254 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:21:43,254 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:21:43,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:21:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:21:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:21:43,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:21:43,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-09-23 21:21:43,260 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2018-09-23 21:21:43,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:43,261 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-09-23 21:21:43,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:21:43,261 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-09-23 21:21:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:21:43,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:43,262 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:43,263 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:43,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:43,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1465268668, now seen corresponding path program 5 times [2018-09-23 21:21:43,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:43,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:43,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:43,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:43,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:43,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:43,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:43,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:21:43,697 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:21:43,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:43,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:43,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:43,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:21:43,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:21:43,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:21:43,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:21:43,740 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 9 states. [2018-09-23 21:21:43,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:43,794 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-09-23 21:21:43,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:21:43,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2018-09-23 21:21:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:43,798 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:21:43,799 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:21:43,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:21:43,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:21:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:21:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:21:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-23 21:21:43,809 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2018-09-23 21:21:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:43,809 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-23 21:21:43,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:21:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-23 21:21:43,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:21:43,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:43,810 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:43,811 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:43,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:43,811 INFO L82 PathProgramCache]: Analyzing trace with hash 980751032, now seen corresponding path program 6 times [2018-09-23 21:21:43,811 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:43,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:43,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:43,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:43,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:43,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:43,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:44,007 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:21:44,133 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-23 21:21:44,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:44,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:44,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:44,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:21:44,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:21:44,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:21:44,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:21:44,194 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2018-09-23 21:21:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:44,330 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2018-09-23 21:21:44,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:21:44,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2018-09-23 21:21:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:44,334 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:21:44,334 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:21:44,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:21:44,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:21:44,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:21:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:21:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2018-09-23 21:21:44,341 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2018-09-23 21:21:44,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:44,342 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2018-09-23 21:21:44,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:21:44,342 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2018-09-23 21:21:44,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:21:44,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:44,344 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:44,344 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:44,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:44,346 INFO L82 PathProgramCache]: Analyzing trace with hash -784229196, now seen corresponding path program 7 times [2018-09-23 21:21:44,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:44,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:44,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:44,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:44,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:44,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:44,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:44,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:44,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:44,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:44,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:21:44,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:21:44,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:21:44,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:21:44,624 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2018-09-23 21:21:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:44,688 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-09-23 21:21:44,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:21:44,694 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-09-23 21:21:44,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:44,695 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:21:44,695 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:21:44,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:21:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:21:44,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:21:44,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:21:44,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-23 21:21:44,702 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 32 [2018-09-23 21:21:44,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:44,703 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-23 21:21:44,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:21:44,703 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-23 21:21:44,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:21:44,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:44,704 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:44,704 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:44,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash -418146384, now seen corresponding path program 8 times [2018-09-23 21:21:44,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:44,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:44,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:44,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:44,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:44,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:44,902 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:44,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:21:44,948 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:44,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:44,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:44,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:44,983 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:21:44,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:21:44,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:21:44,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:21:44,984 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2018-09-23 21:21:45,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:45,264 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2018-09-23 21:21:45,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:21:45,265 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-09-23 21:21:45,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:45,266 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:21:45,266 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:21:45,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:21:45,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:21:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:21:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:21:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2018-09-23 21:21:45,272 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 34 [2018-09-23 21:21:45,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:45,273 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2018-09-23 21:21:45,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:21:45,273 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2018-09-23 21:21:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:21:45,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:45,274 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:45,274 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:45,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:45,275 INFO L82 PathProgramCache]: Analyzing trace with hash -799882324, now seen corresponding path program 9 times [2018-09-23 21:21:45,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:45,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:45,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:45,276 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:45,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:45,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:45,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:45,571 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:45,611 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-23 21:21:45,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:45,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:45,651 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:45,652 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:21:45,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:21:45,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:21:45,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:21:45,653 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 13 states. [2018-09-23 21:21:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:45,763 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2018-09-23 21:21:45,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:21:45,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2018-09-23 21:21:45,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:45,765 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:21:45,765 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:21:45,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:21:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:21:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:21:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:21:45,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-09-23 21:21:45,770 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 36 [2018-09-23 21:21:45,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:45,771 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-09-23 21:21:45,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:21:45,771 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-09-23 21:21:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:21:45,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:45,772 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:45,772 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:45,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:45,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1719066792, now seen corresponding path program 10 times [2018-09-23 21:21:45,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:45,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:45,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:45,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:45,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:45,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:46,144 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:46,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:46,152 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:46,204 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:46,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:46,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:46,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:46,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:21:46,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:21:46,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:21:46,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:21:46,251 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 14 states. [2018-09-23 21:21:46,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:46,381 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-09-23 21:21:46,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:21:46,382 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2018-09-23 21:21:46,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:46,382 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:21:46,382 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:21:46,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:21:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:21:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:21:46,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:21:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-23 21:21:46,391 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 38 [2018-09-23 21:21:46,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:46,391 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-23 21:21:46,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:21:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-23 21:21:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:21:46,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:46,393 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:46,393 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:46,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash 67612324, now seen corresponding path program 11 times [2018-09-23 21:21:46,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:46,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:46,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:46,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:46,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:46,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:46,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:46,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:46,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:21:46,750 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 21:21:46,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:46,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:46,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:46,797 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:21:46,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:21:46,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:21:46,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:21:46,798 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2018-09-23 21:21:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:46,911 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2018-09-23 21:21:46,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:21:46,914 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-23 21:21:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:46,914 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:21:46,915 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:21:46,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:21:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:21:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:21:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:21:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2018-09-23 21:21:46,922 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 40 [2018-09-23 21:21:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:46,922 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2018-09-23 21:21:46,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:21:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2018-09-23 21:21:46,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:21:46,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:46,923 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:46,924 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:46,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:46,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2137199200, now seen corresponding path program 12 times [2018-09-23 21:21:46,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:46,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:46,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:46,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:46,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:47,209 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:47,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:47,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:47,218 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:21:47,330 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-23 21:21:47,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:47,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:47,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:47,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:21:47,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:21:47,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:21:47,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:21:47,386 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 16 states. [2018-09-23 21:21:47,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:47,470 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-09-23 21:21:47,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:21:47,472 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2018-09-23 21:21:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:47,473 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:21:47,473 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:21:47,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:21:47,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:21:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:21:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:21:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-23 21:21:47,478 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2018-09-23 21:21:47,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:47,478 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-23 21:21:47,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:21:47,479 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-23 21:21:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:21:47,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:47,480 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:47,480 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:47,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:47,480 INFO L82 PathProgramCache]: Analyzing trace with hash 752770460, now seen corresponding path program 13 times [2018-09-23 21:21:47,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:47,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:47,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:47,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:47,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:48,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:48,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:48,608 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:48,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:48,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:48,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:21:48,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:21:48,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:21:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:21:48,695 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 17 states. [2018-09-23 21:21:48,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:48,863 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2018-09-23 21:21:48,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:21:48,863 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2018-09-23 21:21:48,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:48,864 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:21:48,864 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:21:48,865 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:21:48,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:21:48,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:21:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:21:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2018-09-23 21:21:48,872 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2018-09-23 21:21:48,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:48,872 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2018-09-23 21:21:48,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:21:48,873 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2018-09-23 21:21:48,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:21:48,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:48,873 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:48,874 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:48,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:48,874 INFO L82 PathProgramCache]: Analyzing trace with hash -830226792, now seen corresponding path program 14 times [2018-09-23 21:21:48,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:48,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:48,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:48,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:48,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:49,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:49,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:49,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:21:49,394 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:49,394 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:49,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:49,428 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:49,459 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:49,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:21:49,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:21:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:21:49,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:21:49,461 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 18 states. [2018-09-23 21:21:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:49,677 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2018-09-23 21:21:49,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:21:49,681 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2018-09-23 21:21:49,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:49,681 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:21:49,681 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:21:49,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:21:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:21:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:21:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:21:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2018-09-23 21:21:49,688 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2018-09-23 21:21:49,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:49,688 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2018-09-23 21:21:49,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:21:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2018-09-23 21:21:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:21:49,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:49,689 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:49,690 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:49,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:49,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1672163180, now seen corresponding path program 15 times [2018-09-23 21:21:49,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:49,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:49,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:49,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:49,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:49,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:49,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:49,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:50,025 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2018-09-23 21:21:50,026 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:50,028 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:50,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:50,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:21:50,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:21:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:21:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:21:50,068 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 19 states. [2018-09-23 21:21:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:50,140 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2018-09-23 21:21:50,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:21:50,141 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2018-09-23 21:21:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:50,142 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:21:50,142 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:21:50,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:21:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:21:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:21:50,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:21:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-09-23 21:21:50,148 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 48 [2018-09-23 21:21:50,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:50,149 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-09-23 21:21:50,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:21:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-09-23 21:21:50,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:21:50,150 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:50,150 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:50,150 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:50,151 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:50,151 INFO L82 PathProgramCache]: Analyzing trace with hash 975786896, now seen corresponding path program 16 times [2018-09-23 21:21:50,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:50,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:50,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:50,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:50,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:50,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:50,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:50,553 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:50,590 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:50,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:50,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:50,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:50,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:21:50,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:21:50,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:21:50,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:21:50,637 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2018-09-23 21:21:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:50,703 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-09-23 21:21:50,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:21:50,704 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2018-09-23 21:21:50,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:50,705 INFO L225 Difference]: With dead ends: 67 [2018-09-23 21:21:50,705 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:21:50,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:21:50,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:21:50,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:21:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:21:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2018-09-23 21:21:50,711 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2018-09-23 21:21:50,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:50,712 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2018-09-23 21:21:50,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:21:50,712 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2018-09-23 21:21:50,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:21:50,712 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:50,713 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:50,713 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:50,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:50,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1259796596, now seen corresponding path program 17 times [2018-09-23 21:21:50,713 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:50,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:50,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:50,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:50,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:51,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:51,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:51,055 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:21:51,102 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 21:21:51,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:51,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:51,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:51,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:21:51,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:21:51,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:21:51,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:21:51,141 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 21 states. [2018-09-23 21:21:51,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:51,328 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2018-09-23 21:21:51,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:21:51,328 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2018-09-23 21:21:51,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:51,329 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:21:51,329 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:21:51,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:21:51,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:21:51,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:21:51,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:21:51,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-23 21:21:51,334 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2018-09-23 21:21:51,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:51,334 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-23 21:21:51,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:21:51,335 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-23 21:21:51,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:21:51,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:51,335 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:51,335 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:51,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:51,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2123082888, now seen corresponding path program 18 times [2018-09-23 21:21:51,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:51,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:51,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:51,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:51,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:51,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:51,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:51,765 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:21:51,811 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-23 21:21:51,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:51,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:51,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:51,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:21:51,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:21:51,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:21:51,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:21:51,863 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-09-23 21:21:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:52,008 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2018-09-23 21:21:52,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:21:52,011 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2018-09-23 21:21:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:52,011 INFO L225 Difference]: With dead ends: 71 [2018-09-23 21:21:52,011 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 21:21:52,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:21:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 21:21:52,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 21:21:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:21:52,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2018-09-23 21:21:52,020 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2018-09-23 21:21:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:52,020 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2018-09-23 21:21:52,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:21:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2018-09-23 21:21:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:21:52,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:52,021 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:52,021 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:52,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:52,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1780023940, now seen corresponding path program 19 times [2018-09-23 21:21:52,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:52,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:52,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:52,023 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:52,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:52,630 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:52,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:52,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:52,638 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:52,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:52,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:52,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:21:52,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:21:52,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:21:52,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:21:52,726 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 23 states. [2018-09-23 21:21:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:52,842 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2018-09-23 21:21:52,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:21:52,843 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2018-09-23 21:21:52,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:52,844 INFO L225 Difference]: With dead ends: 73 [2018-09-23 21:21:52,844 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:21:52,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:21:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:21:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:21:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:21:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-09-23 21:21:52,850 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 56 [2018-09-23 21:21:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:52,850 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-09-23 21:21:52,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:21:52,851 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-09-23 21:21:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:21:52,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:52,851 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:52,851 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:52,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:52,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1482110592, now seen corresponding path program 20 times [2018-09-23 21:21:52,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:52,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:52,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:52,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:52,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:53,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:53,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:53,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:21:53,462 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:53,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:53,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:53,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:53,506 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:21:53,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:21:53,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:21:53,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:21:53,506 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2018-09-23 21:21:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:53,565 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-09-23 21:21:53,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:21:53,566 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2018-09-23 21:21:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:53,566 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:21:53,566 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:21:53,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:21:53,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:21:53,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:21:53,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:21:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-23 21:21:53,572 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 58 [2018-09-23 21:21:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:53,572 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-23 21:21:53,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:21:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-23 21:21:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:21:53,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:53,573 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:53,573 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:53,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:53,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1067269764, now seen corresponding path program 21 times [2018-09-23 21:21:53,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:53,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:53,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:53,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:53,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:53,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:54,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:54,050 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:54,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:54,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2018-09-23 21:21:54,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:54,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:54,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:54,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:21:54,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:21:54,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:21:54,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:21:54,161 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 25 states. [2018-09-23 21:21:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:54,211 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2018-09-23 21:21:54,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:21:54,212 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2018-09-23 21:21:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:54,213 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:21:54,213 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:21:54,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:21:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:21:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 21:21:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 21:21:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-09-23 21:21:54,218 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 60 [2018-09-23 21:21:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:54,218 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-09-23 21:21:54,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:21:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-09-23 21:21:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:21:54,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:54,219 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:54,219 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:54,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:54,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1837192584, now seen corresponding path program 22 times [2018-09-23 21:21:54,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:54,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:54,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:54,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:54,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:54,581 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:54,581 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:54,593 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:54,647 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:54,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:54,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:54,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:54,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:21:54,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:21:54,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:21:54,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:21:54,696 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 26 states. [2018-09-23 21:21:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:54,771 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2018-09-23 21:21:54,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:21:54,772 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-09-23 21:21:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:54,772 INFO L225 Difference]: With dead ends: 79 [2018-09-23 21:21:54,773 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:21:54,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:21:54,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:21:54,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 21:21:54,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:21:54,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-23 21:21:54,779 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2018-09-23 21:21:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:54,779 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-23 21:21:54,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:21:54,779 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-23 21:21:54,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 21:21:54,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:54,780 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:54,780 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:54,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:54,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1296319604, now seen corresponding path program 23 times [2018-09-23 21:21:54,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:54,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:54,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:54,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:54,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:55,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:55,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:55,379 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:21:55,437 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:21:55,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:55,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:55,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:55,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:21:55,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:21:55,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:21:55,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:21:55,487 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 27 states. [2018-09-23 21:21:55,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:55,804 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2018-09-23 21:21:55,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:21:55,804 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 64 [2018-09-23 21:21:55,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:55,805 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:21:55,805 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 21:21:55,806 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:21:55,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 21:21:55,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 21:21:55,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 21:21:55,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2018-09-23 21:21:55,810 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2018-09-23 21:21:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:55,810 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2018-09-23 21:21:55,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:21:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2018-09-23 21:21:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 21:21:55,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:55,811 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:55,811 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:55,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:55,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1829457776, now seen corresponding path program 24 times [2018-09-23 21:21:55,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:55,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:55,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:55,812 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:55,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:56,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:56,437 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:56,444 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:21:56,509 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-23 21:21:56,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:56,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:56,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:56,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:21:56,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:21:56,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:21:56,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:21:56,543 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 28 states. [2018-09-23 21:21:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:56,646 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2018-09-23 21:21:56,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:21:56,646 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2018-09-23 21:21:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:56,647 INFO L225 Difference]: With dead ends: 83 [2018-09-23 21:21:56,647 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 21:21:56,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:21:56,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 21:21:56,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 21:21:56,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 21:21:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2018-09-23 21:21:56,652 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2018-09-23 21:21:56,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:56,652 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2018-09-23 21:21:56,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:21:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2018-09-23 21:21:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:21:56,653 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:56,653 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:56,653 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:56,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:56,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1220834452, now seen corresponding path program 25 times [2018-09-23 21:21:56,654 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:56,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:56,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:56,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:56,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:57,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:57,292 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:57,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:57,348 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:57,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:57,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:21:57,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:21:57,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:21:57,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:21:57,389 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 29 states. [2018-09-23 21:21:57,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:57,524 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-09-23 21:21:57,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:21:57,525 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 68 [2018-09-23 21:21:57,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:57,526 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:21:57,526 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:21:57,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:21:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:21:57,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 21:21:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 21:21:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-09-23 21:21:57,533 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 68 [2018-09-23 21:21:57,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:57,533 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-09-23 21:21:57,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:21:57,533 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-09-23 21:21:57,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 21:21:57,534 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:57,534 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:57,534 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:57,534 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:57,535 INFO L82 PathProgramCache]: Analyzing trace with hash 910997608, now seen corresponding path program 26 times [2018-09-23 21:21:57,535 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:57,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:57,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:57,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:57,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:58,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:58,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:58,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:21:58,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:58,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:58,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:58,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:58,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:21:58,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:21:58,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:21:58,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:21:58,447 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2018-09-23 21:21:58,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:58,503 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2018-09-23 21:21:58,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:21:58,504 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2018-09-23 21:21:58,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:58,505 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:21:58,505 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 21:21:58,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:21:58,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 21:21:58,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 21:21:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 21:21:58,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-09-23 21:21:58,511 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2018-09-23 21:21:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:58,511 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-09-23 21:21:58,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:21:58,511 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-09-23 21:21:58,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 21:21:58,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:58,512 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:58,512 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:58,512 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:58,512 INFO L82 PathProgramCache]: Analyzing trace with hash 902207076, now seen corresponding path program 27 times [2018-09-23 21:21:58,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:58,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:58,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:58,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:58,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:58,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:58,931 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:58,931 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:58,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:59,005 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2018-09-23 21:21:59,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:59,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:59,019 INFO L134 CoverageAnalysis]: Checked inductivity of 830 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:59,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:59,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:21:59,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:21:59,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:21:59,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:21:59,041 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 31 states. [2018-09-23 21:21:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:59,117 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2018-09-23 21:21:59,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:21:59,118 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2018-09-23 21:21:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:59,119 INFO L225 Difference]: With dead ends: 89 [2018-09-23 21:21:59,119 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 21:21:59,120 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:21:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 21:21:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 21:21:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 21:21:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-09-23 21:21:59,125 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2018-09-23 21:21:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:59,126 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-09-23 21:21:59,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:21:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-09-23 21:21:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:21:59,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:59,127 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:59,127 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:59,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:59,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1044440416, now seen corresponding path program 28 times [2018-09-23 21:21:59,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:59,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:59,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:59,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:59,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:59,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:59,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:59,614 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:59,661 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:59,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:59,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:21:59,695 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:59,695 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:21:59,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:21:59,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:21:59,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:21:59,696 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 32 states. [2018-09-23 21:21:59,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:59,818 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2018-09-23 21:21:59,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:21:59,818 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 74 [2018-09-23 21:21:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:59,819 INFO L225 Difference]: With dead ends: 91 [2018-09-23 21:21:59,819 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:21:59,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:21:59,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:21:59,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 21:21:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:21:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2018-09-23 21:21:59,824 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2018-09-23 21:21:59,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:59,824 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2018-09-23 21:21:59,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:21:59,825 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2018-09-23 21:21:59,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:21:59,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:59,825 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:21:59,826 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:59,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:59,826 INFO L82 PathProgramCache]: Analyzing trace with hash 291726684, now seen corresponding path program 29 times [2018-09-23 21:21:59,826 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:59,826 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:59,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:59,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:59,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:00,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:00,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:00,460 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:00,534 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 21:22:00,534 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:00,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 948 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:00,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:00,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:22:00,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:22:00,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:22:00,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:22:00,571 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 33 states. [2018-09-23 21:22:00,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:00,698 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2018-09-23 21:22:00,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:22:00,699 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 76 [2018-09-23 21:22:00,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:00,699 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:22:00,699 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:22:00,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:22:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:22:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 21:22:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:22:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2018-09-23 21:22:00,704 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2018-09-23 21:22:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:00,704 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2018-09-23 21:22:00,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:22:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2018-09-23 21:22:00,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:22:00,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:00,705 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:00,705 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:00,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1511664040, now seen corresponding path program 30 times [2018-09-23 21:22:00,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:00,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:00,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:00,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:00,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:01,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:01,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:01,405 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:01,474 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-23 21:22:01,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:01,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:01,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:01,514 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:01,514 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:22:01,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:22:01,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:22:01,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:22:01,516 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 34 states. [2018-09-23 21:22:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:01,578 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2018-09-23 21:22:01,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:22:01,578 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 78 [2018-09-23 21:22:01,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:01,579 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:22:01,579 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 21:22:01,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:22:01,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 21:22:01,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 21:22:01,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 21:22:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-09-23 21:22:01,583 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 78 [2018-09-23 21:22:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:01,583 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-09-23 21:22:01,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:22:01,583 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-09-23 21:22:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:22:01,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:01,584 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:01,584 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:01,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:01,584 INFO L82 PathProgramCache]: Analyzing trace with hash 596637780, now seen corresponding path program 31 times [2018-09-23 21:22:01,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:01,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:01,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:01,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:01,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:02,774 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:02,774 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:02,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:02,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:02,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:02,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:22:02,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:22:02,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:22:02,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:22:02,888 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 35 states. [2018-09-23 21:22:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:02,994 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2018-09-23 21:22:03,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:22:03,001 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 80 [2018-09-23 21:22:03,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:03,001 INFO L225 Difference]: With dead ends: 97 [2018-09-23 21:22:03,001 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:22:03,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:22:03,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:22:03,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 21:22:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 21:22:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2018-09-23 21:22:03,007 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 80 [2018-09-23 21:22:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:03,007 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2018-09-23 21:22:03,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:22:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2018-09-23 21:22:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:22:03,008 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:03,008 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:03,008 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:03,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:03,009 INFO L82 PathProgramCache]: Analyzing trace with hash -549876912, now seen corresponding path program 32 times [2018-09-23 21:22:03,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:03,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:03,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:03,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:03,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:03,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:03,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:03,569 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:03,622 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:03,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:03,626 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:03,660 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:03,660 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:22:03,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:22:03,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:22:03,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:22:03,661 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 36 states. [2018-09-23 21:22:03,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:03,841 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2018-09-23 21:22:03,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:22:03,842 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 82 [2018-09-23 21:22:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:03,843 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:22:03,843 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 21:22:03,844 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:22:03,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 21:22:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 21:22:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 21:22:03,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-23 21:22:03,849 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 82 [2018-09-23 21:22:03,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:03,850 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-23 21:22:03,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:22:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-23 21:22:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 21:22:03,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:03,851 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:03,851 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:03,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:03,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1456099148, now seen corresponding path program 33 times [2018-09-23 21:22:03,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:03,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:03,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:03,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:03,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:04,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:04,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:04,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:04,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:04,638 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2018-09-23 21:22:04,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:04,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:04,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:04,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:22:04,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:22:04,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:22:04,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:22:04,680 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 37 states. [2018-09-23 21:22:04,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:04,790 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2018-09-23 21:22:04,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:22:04,791 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2018-09-23 21:22:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:04,791 INFO L225 Difference]: With dead ends: 101 [2018-09-23 21:22:04,791 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 21:22:04,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:22:04,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 21:22:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 21:22:04,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 21:22:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-09-23 21:22:04,797 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 84 [2018-09-23 21:22:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:04,797 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-09-23 21:22:04,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:22:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-09-23 21:22:04,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 21:22:04,798 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:04,798 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:04,799 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:04,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:04,799 INFO L82 PathProgramCache]: Analyzing trace with hash 758776904, now seen corresponding path program 34 times [2018-09-23 21:22:04,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:04,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:04,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:04,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:04,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:05,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:05,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:05,495 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:05,550 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:05,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:05,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:05,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:05,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:22:05,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:22:05,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:22:05,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:22:05,592 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 38 states. [2018-09-23 21:22:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:05,753 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-09-23 21:22:05,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:22:05,753 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 86 [2018-09-23 21:22:05,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:05,754 INFO L225 Difference]: With dead ends: 103 [2018-09-23 21:22:05,754 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 21:22:05,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:22:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 21:22:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 21:22:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 21:22:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2018-09-23 21:22:05,760 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2018-09-23 21:22:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:05,760 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2018-09-23 21:22:05,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:22:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2018-09-23 21:22:05,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:22:05,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:05,761 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:05,761 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:05,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:05,761 INFO L82 PathProgramCache]: Analyzing trace with hash 646998596, now seen corresponding path program 35 times [2018-09-23 21:22:05,761 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:05,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:05,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:05,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:05,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:06,558 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:06,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:06,566 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:06,667 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 21:22:06,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:06,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:06,727 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:06,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:22:06,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:22:06,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:22:06,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:22:06,729 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 39 states. [2018-09-23 21:22:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:07,805 INFO L93 Difference]: Finished difference Result 105 states and 109 transitions. [2018-09-23 21:22:07,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:22:07,805 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 88 [2018-09-23 21:22:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:07,806 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:22:07,806 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 21:22:07,807 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:22:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 21:22:07,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 21:22:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 21:22:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-23 21:22:07,813 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2018-09-23 21:22:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:07,813 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-23 21:22:07,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:22:07,814 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-23 21:22:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 21:22:07,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:07,814 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:07,815 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:07,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:07,815 INFO L82 PathProgramCache]: Analyzing trace with hash 602227008, now seen corresponding path program 36 times [2018-09-23 21:22:07,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:07,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:07,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:07,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:07,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:08,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:08,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:08,574 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:08,663 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-23 21:22:08,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:08,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:08,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:08,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:22:08,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:22:08,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:22:08,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:22:08,708 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 40 states. [2018-09-23 21:22:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:08,772 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2018-09-23 21:22:08,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:22:08,772 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 90 [2018-09-23 21:22:08,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:08,773 INFO L225 Difference]: With dead ends: 107 [2018-09-23 21:22:08,774 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 21:22:08,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:22:08,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 21:22:08,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 21:22:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 21:22:08,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2018-09-23 21:22:08,779 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 90 [2018-09-23 21:22:08,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:08,780 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2018-09-23 21:22:08,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:22:08,780 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2018-09-23 21:22:08,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:22:08,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:08,780 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:08,780 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:08,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash 526403900, now seen corresponding path program 37 times [2018-09-23 21:22:08,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:08,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:08,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:08,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:08,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:09,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:09,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:09,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:09,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:10,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:10,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:22:10,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:22:10,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:22:10,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:22:10,019 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand 41 states. [2018-09-23 21:22:10,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:10,086 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2018-09-23 21:22:10,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:22:10,086 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 92 [2018-09-23 21:22:10,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:10,087 INFO L225 Difference]: With dead ends: 109 [2018-09-23 21:22:10,088 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 21:22:10,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:22:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 21:22:10,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 21:22:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 21:22:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-23 21:22:10,093 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 92 [2018-09-23 21:22:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:10,093 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-23 21:22:10,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:22:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-23 21:22:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 21:22:10,094 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:10,094 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:10,094 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:10,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:10,095 INFO L82 PathProgramCache]: Analyzing trace with hash 674841144, now seen corresponding path program 38 times [2018-09-23 21:22:10,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:10,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:10,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:10,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:10,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:11,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:11,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:11,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:11,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:11,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:11,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1578 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:11,292 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:11,293 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:22:11,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:22:11,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:22:11,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:22:11,294 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 42 states. [2018-09-23 21:22:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:11,394 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2018-09-23 21:22:11,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:22:11,394 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 94 [2018-09-23 21:22:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:11,395 INFO L225 Difference]: With dead ends: 111 [2018-09-23 21:22:11,395 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 21:22:11,396 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:22:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 21:22:11,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 21:22:11,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 21:22:11,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2018-09-23 21:22:11,401 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 94 [2018-09-23 21:22:11,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:11,402 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2018-09-23 21:22:11,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:22:11,402 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2018-09-23 21:22:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 21:22:11,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:11,402 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:11,403 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:11,403 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:11,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1589111860, now seen corresponding path program 39 times [2018-09-23 21:22:11,403 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:11,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:11,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:11,404 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:11,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:11,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:12,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:12,599 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:12,607 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:12,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2018-09-23 21:22:12,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:12,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:12,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:12,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:22:12,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:22:12,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:22:12,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:22:12,806 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 43 states. [2018-09-23 21:22:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:13,003 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2018-09-23 21:22:13,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:22:13,008 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 96 [2018-09-23 21:22:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:13,009 INFO L225 Difference]: With dead ends: 113 [2018-09-23 21:22:13,009 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:22:13,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:22:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:22:13,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 21:22:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 21:22:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2018-09-23 21:22:13,017 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2018-09-23 21:22:13,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:13,017 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2018-09-23 21:22:13,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:22:13,018 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2018-09-23 21:22:13,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:22:13,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:13,019 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:13,019 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:13,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:13,019 INFO L82 PathProgramCache]: Analyzing trace with hash -265025744, now seen corresponding path program 40 times [2018-09-23 21:22:13,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:13,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:13,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:13,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:13,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:14,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:14,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:14,009 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:14,074 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:14,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:14,078 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:14,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:14,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:22:14,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:22:14,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:22:14,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:22:14,130 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2018-09-23 21:22:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:15,443 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2018-09-23 21:22:15,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:22:15,443 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2018-09-23 21:22:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:15,444 INFO L225 Difference]: With dead ends: 115 [2018-09-23 21:22:15,444 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:22:15,445 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:22:15,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:22:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:22:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:22:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-23 21:22:15,450 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2018-09-23 21:22:15,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:15,451 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-23 21:22:15,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:22:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-23 21:22:15,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 21:22:15,452 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:15,452 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:15,452 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:15,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:15,452 INFO L82 PathProgramCache]: Analyzing trace with hash 320164652, now seen corresponding path program 41 times [2018-09-23 21:22:15,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:15,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:15,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:15,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:16,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:16,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:16,942 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:17,032 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 21:22:17,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:17,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1824 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:17,077 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:17,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:22:17,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:22:17,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:22:17,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:22:17,078 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 45 states. [2018-09-23 21:22:17,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:17,455 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2018-09-23 21:22:17,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:22:17,455 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 100 [2018-09-23 21:22:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:17,456 INFO L225 Difference]: With dead ends: 117 [2018-09-23 21:22:17,456 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 21:22:17,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:22:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 21:22:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 21:22:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 21:22:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2018-09-23 21:22:17,464 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2018-09-23 21:22:17,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:17,464 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2018-09-23 21:22:17,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:22:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2018-09-23 21:22:17,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 21:22:17,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:17,465 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:17,465 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:17,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:17,465 INFO L82 PathProgramCache]: Analyzing trace with hash 47419432, now seen corresponding path program 42 times [2018-09-23 21:22:17,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:17,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:17,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:17,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:17,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:18,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:18,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:18,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:18,885 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-23 21:22:18,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:18,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:18,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1910 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:18,923 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:18,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:22:18,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:22:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:22:18,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:22:18,925 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 46 states. [2018-09-23 21:22:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:19,031 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2018-09-23 21:22:19,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:22:19,032 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 102 [2018-09-23 21:22:19,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:19,033 INFO L225 Difference]: With dead ends: 119 [2018-09-23 21:22:19,033 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 21:22:19,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:22:19,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 21:22:19,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 21:22:19,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 21:22:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-23 21:22:19,040 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 102 [2018-09-23 21:22:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:19,040 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-23 21:22:19,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:22:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-23 21:22:19,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 21:22:19,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:19,041 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:19,041 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:19,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:19,041 INFO L82 PathProgramCache]: Analyzing trace with hash -67731932, now seen corresponding path program 43 times [2018-09-23 21:22:19,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:19,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:19,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:19,042 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:19,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:20,202 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:20,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:20,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:20,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:20,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:20,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:22:20,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:22:20,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:22:20,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:22:20,331 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-09-23 21:22:20,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:20,844 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-09-23 21:22:20,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:22:20,845 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-09-23 21:22:20,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:20,845 INFO L225 Difference]: With dead ends: 121 [2018-09-23 21:22:20,846 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 21:22:20,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:22:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 21:22:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 21:22:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 21:22:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2018-09-23 21:22:20,852 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 104 [2018-09-23 21:22:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:20,852 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2018-09-23 21:22:20,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:22:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2018-09-23 21:22:20,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 21:22:20,853 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:20,853 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:20,853 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:20,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:20,854 INFO L82 PathProgramCache]: Analyzing trace with hash 940956960, now seen corresponding path program 44 times [2018-09-23 21:22:20,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:20,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:20,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:20,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:20,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:22,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:22,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:22,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:22,114 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:22,114 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:22,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:22,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:22,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:22,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:22:22,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:22:22,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:22:22,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:22:22,160 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 48 states. [2018-09-23 21:22:22,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:22,338 INFO L93 Difference]: Finished difference Result 123 states and 127 transitions. [2018-09-23 21:22:22,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:22:22,338 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 106 [2018-09-23 21:22:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:22,339 INFO L225 Difference]: With dead ends: 123 [2018-09-23 21:22:22,339 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 21:22:22,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:22:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 21:22:22,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 21:22:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 21:22:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2018-09-23 21:22:22,346 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 106 [2018-09-23 21:22:22,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:22,347 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2018-09-23 21:22:22,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:22:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2018-09-23 21:22:22,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 21:22:22,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:22,347 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:22,348 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:22,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:22,348 INFO L82 PathProgramCache]: Analyzing trace with hash -371626724, now seen corresponding path program 45 times [2018-09-23 21:22:22,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:22,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:22,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:22,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:22,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:23,861 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:23,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:23,868 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:23,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2018-09-23 21:22:23,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:23,984 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2180 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:24,027 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:24,027 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:22:24,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:22:24,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:22:24,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:22:24,029 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand 49 states. [2018-09-23 21:22:24,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:24,228 INFO L93 Difference]: Finished difference Result 125 states and 129 transitions. [2018-09-23 21:22:24,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:22:24,229 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 108 [2018-09-23 21:22:24,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:24,230 INFO L225 Difference]: With dead ends: 125 [2018-09-23 21:22:24,230 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 21:22:24,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:22:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 21:22:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 21:22:24,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 21:22:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-09-23 21:22:24,236 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 108 [2018-09-23 21:22:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:24,236 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-09-23 21:22:24,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:22:24,237 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-09-23 21:22:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 21:22:24,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:24,237 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:24,238 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:24,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:24,238 INFO L82 PathProgramCache]: Analyzing trace with hash 955837976, now seen corresponding path program 46 times [2018-09-23 21:22:24,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:24,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:24,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:24,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:24,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:25,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:25,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:25,552 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:25,635 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:25,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:25,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2274 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:25,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:25,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:22:25,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:22:25,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:22:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:22:25,691 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 50 states. [2018-09-23 21:22:25,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:25,817 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2018-09-23 21:22:25,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:22:25,818 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 110 [2018-09-23 21:22:25,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:25,819 INFO L225 Difference]: With dead ends: 127 [2018-09-23 21:22:25,820 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 21:22:25,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:22:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 21:22:25,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 21:22:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 21:22:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2018-09-23 21:22:25,827 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2018-09-23 21:22:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:25,827 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2018-09-23 21:22:25,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:22:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2018-09-23 21:22:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 21:22:25,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:25,828 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:25,829 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:25,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:25,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1044127764, now seen corresponding path program 47 times [2018-09-23 21:22:25,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:25,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:25,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:25,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:25,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:27,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:27,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:27,342 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:27,465 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 21:22:27,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:27,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2370 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:27,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:27,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:22:27,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:22:27,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:22:27,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:22:27,523 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 51 states. [2018-09-23 21:22:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:27,665 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2018-09-23 21:22:27,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:22:27,667 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 112 [2018-09-23 21:22:27,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:27,668 INFO L225 Difference]: With dead ends: 129 [2018-09-23 21:22:27,668 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 21:22:27,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:22:27,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 21:22:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 21:22:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 21:22:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-23 21:22:27,675 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2018-09-23 21:22:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:27,675 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-23 21:22:27,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:22:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-23 21:22:27,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 21:22:27,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:27,676 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:27,677 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:27,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:27,677 INFO L82 PathProgramCache]: Analyzing trace with hash -8731888, now seen corresponding path program 48 times [2018-09-23 21:22:27,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:27,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:27,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:27,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:27,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:28,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:28,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:28,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:29,039 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-23 21:22:29,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:29,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2468 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:29,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:29,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:22:29,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:22:29,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:22:29,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:22:29,081 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 52 states. [2018-09-23 21:22:29,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:29,256 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2018-09-23 21:22:29,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:22:29,256 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 114 [2018-09-23 21:22:29,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:29,258 INFO L225 Difference]: With dead ends: 131 [2018-09-23 21:22:29,258 INFO L226 Difference]: Without dead ends: 117 [2018-09-23 21:22:29,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:22:29,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-23 21:22:29,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-23 21:22:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-23 21:22:29,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2018-09-23 21:22:29,264 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 114 [2018-09-23 21:22:29,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:29,264 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2018-09-23 21:22:29,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:22:29,264 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2018-09-23 21:22:29,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-23 21:22:29,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:29,265 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:29,265 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:29,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:29,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1805424396, now seen corresponding path program 49 times [2018-09-23 21:22:29,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:29,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:29,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:29,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:29,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:30,273 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:30,273 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:30,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:30,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2568 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:30,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:30,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:22:30,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:22:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:22:30,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:22:30,419 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand 53 states. [2018-09-23 21:22:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:30,639 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2018-09-23 21:22:30,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:22:30,640 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 116 [2018-09-23 21:22:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:30,641 INFO L225 Difference]: With dead ends: 133 [2018-09-23 21:22:30,641 INFO L226 Difference]: Without dead ends: 119 [2018-09-23 21:22:30,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:22:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-23 21:22:30,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-23 21:22:30,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-23 21:22:30,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-09-23 21:22:30,647 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 116 [2018-09-23 21:22:30,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:30,648 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-09-23 21:22:30,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:22:30,648 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-09-23 21:22:30,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-23 21:22:30,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:30,649 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:30,649 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:30,649 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:30,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1452891144, now seen corresponding path program 50 times [2018-09-23 21:22:30,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:30,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:30,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:30,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:30,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:32,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:32,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:32,071 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:32,078 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:32,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:32,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:32,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:32,213 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:32,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:22:32,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:22:32,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:22:32,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:22:32,215 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 54 states. [2018-09-23 21:22:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:32,410 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-09-23 21:22:32,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:22:32,410 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 118 [2018-09-23 21:22:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:32,412 INFO L225 Difference]: With dead ends: 135 [2018-09-23 21:22:32,412 INFO L226 Difference]: Without dead ends: 121 [2018-09-23 21:22:32,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:22:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-23 21:22:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-23 21:22:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 21:22:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-23 21:22:32,418 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 118 [2018-09-23 21:22:32,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:32,418 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-23 21:22:32,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:22:32,418 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-23 21:22:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-23 21:22:32,419 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:32,419 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:32,419 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:32,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:32,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1970852356, now seen corresponding path program 51 times [2018-09-23 21:22:32,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:32,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:32,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:32,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:32,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:34,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:34,128 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:34,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:34,271 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 53 check-sat command(s) [2018-09-23 21:22:34,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:34,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:34,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2774 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:34,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:34,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:22:34,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:22:34,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:22:34,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:22:34,330 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 55 states. [2018-09-23 21:22:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:34,465 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2018-09-23 21:22:34,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:22:34,466 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 120 [2018-09-23 21:22:34,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:34,467 INFO L225 Difference]: With dead ends: 137 [2018-09-23 21:22:34,467 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 21:22:34,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:22:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 21:22:34,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-23 21:22:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-23 21:22:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2018-09-23 21:22:34,475 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 120 [2018-09-23 21:22:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:34,475 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2018-09-23 21:22:34,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:22:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2018-09-23 21:22:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-23 21:22:34,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:34,476 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:34,476 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:34,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:34,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1515370752, now seen corresponding path program 52 times [2018-09-23 21:22:34,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:34,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:34,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:34,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:34,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:34,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:35,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:35,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:35,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:35,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:35,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:35,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2880 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:35,896 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:35,896 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:22:35,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:22:35,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:22:35,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:22:35,897 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 56 states. [2018-09-23 21:22:35,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:35,992 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-09-23 21:22:35,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:22:35,993 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 122 [2018-09-23 21:22:35,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:35,994 INFO L225 Difference]: With dead ends: 139 [2018-09-23 21:22:35,994 INFO L226 Difference]: Without dead ends: 125 [2018-09-23 21:22:35,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:22:35,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-23 21:22:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-23 21:22:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 21:22:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-09-23 21:22:36,001 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2018-09-23 21:22:36,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:36,001 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-09-23 21:22:36,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:22:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-09-23 21:22:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 21:22:36,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:36,002 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:36,002 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:36,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:36,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1884213500, now seen corresponding path program 53 times [2018-09-23 21:22:36,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:36,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:36,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:36,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:36,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:37,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:37,660 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:37,673 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:37,862 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-23 21:22:37,862 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:37,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2988 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:37,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:37,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 21:22:37,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:22:37,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:22:37,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:22:37,907 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 57 states. [2018-09-23 21:22:38,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:38,077 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2018-09-23 21:22:38,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:22:38,077 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 124 [2018-09-23 21:22:38,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:38,078 INFO L225 Difference]: With dead ends: 141 [2018-09-23 21:22:38,078 INFO L226 Difference]: Without dead ends: 127 [2018-09-23 21:22:38,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:22:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-23 21:22:38,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-23 21:22:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-23 21:22:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2018-09-23 21:22:38,083 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2018-09-23 21:22:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:38,083 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2018-09-23 21:22:38,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:22:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2018-09-23 21:22:38,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-23 21:22:38,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:38,084 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:38,084 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:38,084 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:38,084 INFO L82 PathProgramCache]: Analyzing trace with hash -140191240, now seen corresponding path program 54 times [2018-09-23 21:22:38,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:38,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:38,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:38,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:38,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:39,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:39,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:39,480 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:39,669 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-09-23 21:22:39,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:39,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:39,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3098 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:39,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:39,728 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:22:39,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:22:39,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:22:39,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:22:39,730 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 58 states. [2018-09-23 21:22:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:39,883 INFO L93 Difference]: Finished difference Result 143 states and 147 transitions. [2018-09-23 21:22:39,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:22:39,884 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 126 [2018-09-23 21:22:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:39,885 INFO L225 Difference]: With dead ends: 143 [2018-09-23 21:22:39,885 INFO L226 Difference]: Without dead ends: 129 [2018-09-23 21:22:39,886 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:22:39,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-23 21:22:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-23 21:22:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 21:22:39,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-09-23 21:22:39,892 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 126 [2018-09-23 21:22:39,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:39,892 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-09-23 21:22:39,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:22:39,892 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-09-23 21:22:39,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-23 21:22:39,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:39,893 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:39,893 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:39,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:39,893 INFO L82 PathProgramCache]: Analyzing trace with hash 27038708, now seen corresponding path program 55 times [2018-09-23 21:22:39,893 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:39,893 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:39,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:39,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:39,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:41,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:41,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:41,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:41,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:41,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:41,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:22:41,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:22:41,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:22:41,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:22:41,318 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-09-23 21:22:41,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:41,490 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2018-09-23 21:22:41,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:22:41,490 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-09-23 21:22:41,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:41,491 INFO L225 Difference]: With dead ends: 145 [2018-09-23 21:22:41,492 INFO L226 Difference]: Without dead ends: 131 [2018-09-23 21:22:41,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:22:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-23 21:22:41,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-23 21:22:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-23 21:22:41,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-23 21:22:41,498 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 128 [2018-09-23 21:22:41,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:41,498 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-23 21:22:41,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:22:41,498 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-23 21:22:41,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-23 21:22:41,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:41,499 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:41,499 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:41,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:41,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1821228784, now seen corresponding path program 56 times [2018-09-23 21:22:41,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:41,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:41,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:41,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:41,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:43,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:43,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:43,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:43,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:43,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:43,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:43,246 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:43,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 21:22:43,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:22:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:22:43,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:22:43,248 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 60 states. [2018-09-23 21:22:43,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:43,651 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2018-09-23 21:22:43,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:22:43,652 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 130 [2018-09-23 21:22:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:43,653 INFO L225 Difference]: With dead ends: 147 [2018-09-23 21:22:43,653 INFO L226 Difference]: Without dead ends: 133 [2018-09-23 21:22:43,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:22:43,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-23 21:22:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-23 21:22:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-23 21:22:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-09-23 21:22:43,658 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 130 [2018-09-23 21:22:43,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:43,658 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-09-23 21:22:43,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:22:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-09-23 21:22:43,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-23 21:22:43,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:43,659 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:43,659 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:43,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:43,660 INFO L82 PathProgramCache]: Analyzing trace with hash -538961172, now seen corresponding path program 57 times [2018-09-23 21:22:43,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:43,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:43,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:43,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:43,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:44,980 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:44,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:44,988 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:45,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 59 check-sat command(s) [2018-09-23 21:22:45,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:45,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3440 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:45,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:45,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 21:22:45,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 21:22:45,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 21:22:45,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:22:45,182 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 61 states. [2018-09-23 21:22:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:45,286 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2018-09-23 21:22:45,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:22:45,287 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 132 [2018-09-23 21:22:45,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:45,288 INFO L225 Difference]: With dead ends: 149 [2018-09-23 21:22:45,288 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 21:22:45,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:22:45,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 21:22:45,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-23 21:22:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-23 21:22:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-09-23 21:22:45,294 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 132 [2018-09-23 21:22:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:45,294 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-09-23 21:22:45,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 21:22:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-09-23 21:22:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-23 21:22:45,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:45,295 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:45,295 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:45,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:45,295 INFO L82 PathProgramCache]: Analyzing trace with hash -938776600, now seen corresponding path program 58 times [2018-09-23 21:22:45,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:45,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:45,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:45,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:45,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:45,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:47,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:47,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:47,031 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:47,120 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:47,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:47,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3558 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:47,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:47,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:22:47,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:22:47,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:22:47,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:22:47,174 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 62 states. [2018-09-23 21:22:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:47,354 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2018-09-23 21:22:47,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:22:47,354 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 134 [2018-09-23 21:22:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:47,355 INFO L225 Difference]: With dead ends: 151 [2018-09-23 21:22:47,355 INFO L226 Difference]: Without dead ends: 137 [2018-09-23 21:22:47,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:22:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-23 21:22:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-23 21:22:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-23 21:22:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2018-09-23 21:22:47,361 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2018-09-23 21:22:47,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:47,361 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2018-09-23 21:22:47,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:22:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2018-09-23 21:22:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-23 21:22:47,361 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:47,362 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:47,362 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:47,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:47,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1385653732, now seen corresponding path program 59 times [2018-09-23 21:22:47,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:47,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:47,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:47,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:47,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:48,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:48,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:48,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:48,933 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-23 21:22:48,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:48,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3678 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:48,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:48,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 21:22:48,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 21:22:48,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 21:22:48,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:22:48,999 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 63 states. [2018-09-23 21:22:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:49,782 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2018-09-23 21:22:49,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:22:49,782 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 136 [2018-09-23 21:22:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:49,783 INFO L225 Difference]: With dead ends: 153 [2018-09-23 21:22:49,783 INFO L226 Difference]: Without dead ends: 139 [2018-09-23 21:22:49,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:22:49,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-23 21:22:49,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-23 21:22:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-23 21:22:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2018-09-23 21:22:49,789 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 136 [2018-09-23 21:22:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:49,789 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2018-09-23 21:22:49,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 21:22:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2018-09-23 21:22:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-23 21:22:49,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:49,790 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:49,790 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:49,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:49,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1780208864, now seen corresponding path program 60 times [2018-09-23 21:22:49,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:49,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:49,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:49,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:49,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:51,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:51,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:51,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:51,274 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:51,430 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2018-09-23 21:22:51,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:51,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3800 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:51,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:51,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:22:51,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:22:51,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:22:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:22:51,493 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 64 states. [2018-09-23 21:22:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:51,631 INFO L93 Difference]: Finished difference Result 155 states and 159 transitions. [2018-09-23 21:22:51,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:22:51,631 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 138 [2018-09-23 21:22:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:51,632 INFO L225 Difference]: With dead ends: 155 [2018-09-23 21:22:51,632 INFO L226 Difference]: Without dead ends: 141 [2018-09-23 21:22:51,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:22:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-23 21:22:51,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-23 21:22:51,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-23 21:22:51,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-09-23 21:22:51,638 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 138 [2018-09-23 21:22:51,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:51,639 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-09-23 21:22:51,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:22:51,639 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-09-23 21:22:51,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-23 21:22:51,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:51,640 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:51,640 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:51,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:51,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1304398628, now seen corresponding path program 61 times [2018-09-23 21:22:51,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:51,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:51,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:51,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:53,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:53,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:53,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:53,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:53,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:53,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3924 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:53,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:53,567 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 21:22:53,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:22:53,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:22:53,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:22:53,569 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 65 states. [2018-09-23 21:22:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:53,764 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-09-23 21:22:53,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:22:53,764 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 140 [2018-09-23 21:22:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:53,765 INFO L225 Difference]: With dead ends: 157 [2018-09-23 21:22:53,765 INFO L226 Difference]: Without dead ends: 143 [2018-09-23 21:22:53,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:22:53,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-23 21:22:53,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-23 21:22:53,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-23 21:22:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-09-23 21:22:53,771 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 140 [2018-09-23 21:22:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:53,771 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-09-23 21:22:53,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:22:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-09-23 21:22:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-23 21:22:53,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:53,772 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:53,772 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:53,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash -2084764200, now seen corresponding path program 62 times [2018-09-23 21:22:53,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:53,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:53,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:53,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:55,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:55,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:55,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:55,418 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:55,516 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:55,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:55,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:55,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:55,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 21:22:55,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:22:55,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:22:55,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:22:55,589 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 66 states. [2018-09-23 21:22:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:56,143 INFO L93 Difference]: Finished difference Result 159 states and 163 transitions. [2018-09-23 21:22:56,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:22:56,144 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 142 [2018-09-23 21:22:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:56,145 INFO L225 Difference]: With dead ends: 159 [2018-09-23 21:22:56,145 INFO L226 Difference]: Without dead ends: 145 [2018-09-23 21:22:56,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:22:56,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-23 21:22:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-23 21:22:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-23 21:22:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-23 21:22:56,152 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 142 [2018-09-23 21:22:56,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:56,152 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-23 21:22:56,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:22:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-23 21:22:56,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-23 21:22:56,153 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:56,154 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:56,154 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:56,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:56,154 INFO L82 PathProgramCache]: Analyzing trace with hash -396802092, now seen corresponding path program 63 times [2018-09-23 21:22:56,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:56,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:56,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:56,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:58,269 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:58,269 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:58,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:58,450 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2018-09-23 21:22:58,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:58,454 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4178 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:22:58,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:58,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 21:22:58,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 21:22:58,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 21:22:58,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:22:58,499 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 67 states. [2018-09-23 21:22:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:58,696 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2018-09-23 21:22:58,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:22:58,698 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 144 [2018-09-23 21:22:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:58,698 INFO L225 Difference]: With dead ends: 161 [2018-09-23 21:22:58,698 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 21:22:58,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:22:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 21:22:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-23 21:22:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-23 21:22:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-09-23 21:22:58,706 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 144 [2018-09-23 21:22:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:58,706 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-09-23 21:22:58,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 21:22:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-09-23 21:22:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-23 21:22:58,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:58,707 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:22:58,708 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:58,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:58,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1762854192, now seen corresponding path program 64 times [2018-09-23 21:22:58,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:58,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:58,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:58,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:00,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:00,320 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:00,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:00,328 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:00,420 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:00,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:00,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4308 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:00,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:00,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:23:00,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:23:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:23:00,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:23:00,488 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 68 states. [2018-09-23 21:23:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:00,627 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2018-09-23 21:23:00,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:23:00,627 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 146 [2018-09-23 21:23:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:00,628 INFO L225 Difference]: With dead ends: 163 [2018-09-23 21:23:00,628 INFO L226 Difference]: Without dead ends: 149 [2018-09-23 21:23:00,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:23:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-23 21:23:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-23 21:23:00,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 21:23:00,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2018-09-23 21:23:00,636 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2018-09-23 21:23:00,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:00,636 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2018-09-23 21:23:00,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:23:00,636 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2018-09-23 21:23:00,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 21:23:00,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:00,637 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:00,637 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:00,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:00,638 INFO L82 PathProgramCache]: Analyzing trace with hash -278929716, now seen corresponding path program 65 times [2018-09-23 21:23:00,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:00,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:00,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,638 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:00,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:02,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:02,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:02,826 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:03,005 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-23 21:23:03,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:03,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4440 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:03,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:03,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 21:23:03,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 21:23:03,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 21:23:03,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:23:03,067 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 69 states. [2018-09-23 21:23:03,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:03,276 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2018-09-23 21:23:03,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:23:03,277 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 148 [2018-09-23 21:23:03,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:03,278 INFO L225 Difference]: With dead ends: 165 [2018-09-23 21:23:03,278 INFO L226 Difference]: Without dead ends: 151 [2018-09-23 21:23:03,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:23:03,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-23 21:23:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-23 21:23:03,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-23 21:23:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-23 21:23:03,286 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 148 [2018-09-23 21:23:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:03,286 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-23 21:23:03,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 21:23:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-23 21:23:03,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-23 21:23:03,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:03,287 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:03,287 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:03,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:03,287 INFO L82 PathProgramCache]: Analyzing trace with hash -156650552, now seen corresponding path program 66 times [2018-09-23 21:23:03,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:03,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:03,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:03,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:05,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:05,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:05,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:05,041 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:05,219 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2018-09-23 21:23:05,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:05,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4574 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:05,269 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:05,270 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:23:05,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:23:05,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:23:05,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:23:05,271 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 70 states. [2018-09-23 21:23:05,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:05,480 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2018-09-23 21:23:05,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:23:05,481 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 150 [2018-09-23 21:23:05,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:05,482 INFO L225 Difference]: With dead ends: 167 [2018-09-23 21:23:05,482 INFO L226 Difference]: Without dead ends: 153 [2018-09-23 21:23:05,482 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:23:05,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-23 21:23:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-23 21:23:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-23 21:23:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2018-09-23 21:23:05,488 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2018-09-23 21:23:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:05,488 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2018-09-23 21:23:05,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:23:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2018-09-23 21:23:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-23 21:23:05,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:05,489 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:05,489 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:05,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1389509060, now seen corresponding path program 67 times [2018-09-23 21:23:05,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:05,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:05,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:05,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:05,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:07,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:07,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:07,703 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:07,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4710 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:07,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:07,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 21:23:07,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:23:07,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:23:07,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:23:07,856 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 71 states. [2018-09-23 21:23:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:08,076 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2018-09-23 21:23:08,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:23:08,077 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 152 [2018-09-23 21:23:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:08,078 INFO L225 Difference]: With dead ends: 169 [2018-09-23 21:23:08,078 INFO L226 Difference]: Without dead ends: 155 [2018-09-23 21:23:08,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:23:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-23 21:23:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-23 21:23:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-23 21:23:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-23 21:23:08,085 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2018-09-23 21:23:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:08,085 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-23 21:23:08,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:23:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-23 21:23:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-23 21:23:08,086 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:08,086 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:08,086 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:08,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:08,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1190211776, now seen corresponding path program 68 times [2018-09-23 21:23:08,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:08,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:08,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:08,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:08,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:09,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:09,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:09,903 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:09,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:09,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:10,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4848 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:10,064 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:10,064 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 21:23:10,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:23:10,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:23:10,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:23:10,066 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 72 states. [2018-09-23 21:23:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:10,666 INFO L93 Difference]: Finished difference Result 171 states and 175 transitions. [2018-09-23 21:23:10,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:23:10,666 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 154 [2018-09-23 21:23:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:10,667 INFO L225 Difference]: With dead ends: 171 [2018-09-23 21:23:10,667 INFO L226 Difference]: Without dead ends: 157 [2018-09-23 21:23:10,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:23:10,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-23 21:23:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-23 21:23:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-23 21:23:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-09-23 21:23:10,672 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 154 [2018-09-23 21:23:10,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:10,672 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-09-23 21:23:10,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:23:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-09-23 21:23:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-23 21:23:10,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:10,673 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:10,674 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:10,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:10,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1355917124, now seen corresponding path program 69 times [2018-09-23 21:23:10,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:10,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:10,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:10,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:10,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:12,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:12,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:12,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:13,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 71 check-sat command(s) [2018-09-23 21:23:13,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:13,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:13,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4988 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:13,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:13,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 21:23:13,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 21:23:13,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 21:23:13,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:23:13,236 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 73 states. [2018-09-23 21:23:13,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:13,468 INFO L93 Difference]: Finished difference Result 173 states and 177 transitions. [2018-09-23 21:23:13,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:23:13,468 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 156 [2018-09-23 21:23:13,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:13,469 INFO L225 Difference]: With dead ends: 173 [2018-09-23 21:23:13,470 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 21:23:13,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:23:13,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 21:23:13,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-23 21:23:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-23 21:23:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2018-09-23 21:23:13,476 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 156 [2018-09-23 21:23:13,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:13,476 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2018-09-23 21:23:13,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 21:23:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2018-09-23 21:23:13,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-23 21:23:13,477 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:13,477 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:13,477 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:13,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:13,478 INFO L82 PathProgramCache]: Analyzing trace with hash -54431304, now seen corresponding path program 70 times [2018-09-23 21:23:13,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:13,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:13,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:13,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:13,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:15,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:15,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:15,379 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:15,476 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:15,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:15,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5130 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:15,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:15,536 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 21:23:15,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:23:15,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:23:15,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:23:15,538 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 74 states. [2018-09-23 21:23:15,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:15,791 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-09-23 21:23:15,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:23:15,792 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 158 [2018-09-23 21:23:15,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:15,793 INFO L225 Difference]: With dead ends: 175 [2018-09-23 21:23:15,793 INFO L226 Difference]: Without dead ends: 161 [2018-09-23 21:23:15,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:23:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-23 21:23:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-23 21:23:15,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-23 21:23:15,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-23 21:23:15,800 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 158 [2018-09-23 21:23:15,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:15,801 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-23 21:23:15,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:23:15,801 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-23 21:23:15,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-23 21:23:15,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:15,802 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:15,802 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:15,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:15,802 INFO L82 PathProgramCache]: Analyzing trace with hash 837958580, now seen corresponding path program 71 times [2018-09-23 21:23:15,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:15,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:15,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:15,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:15,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:18,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:18,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:18,132 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:18,330 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-23 21:23:18,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:18,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5274 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:18,382 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:18,382 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 21:23:18,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 21:23:18,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 21:23:18,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:23:18,384 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 75 states. [2018-09-23 21:23:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:18,535 INFO L93 Difference]: Finished difference Result 177 states and 181 transitions. [2018-09-23 21:23:18,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:23:18,536 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 160 [2018-09-23 21:23:18,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:18,537 INFO L225 Difference]: With dead ends: 177 [2018-09-23 21:23:18,537 INFO L226 Difference]: Without dead ends: 163 [2018-09-23 21:23:18,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:23:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-23 21:23:18,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-23 21:23:18,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-23 21:23:18,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2018-09-23 21:23:18,545 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 160 [2018-09-23 21:23:18,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:18,546 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2018-09-23 21:23:18,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 21:23:18,546 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2018-09-23 21:23:18,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-23 21:23:18,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:18,547 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:18,547 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:18,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:18,547 INFO L82 PathProgramCache]: Analyzing trace with hash -568822096, now seen corresponding path program 72 times [2018-09-23 21:23:18,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:18,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:18,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:18,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:18,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:20,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:20,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:20,578 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:20,793 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 74 check-sat command(s) [2018-09-23 21:23:20,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:20,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:20,843 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:20,843 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 21:23:20,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:23:20,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:23:20,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:23:20,845 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 76 states. [2018-09-23 21:23:21,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:21,102 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2018-09-23 21:23:21,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:23:21,102 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 162 [2018-09-23 21:23:21,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:21,103 INFO L225 Difference]: With dead ends: 179 [2018-09-23 21:23:21,103 INFO L226 Difference]: Without dead ends: 165 [2018-09-23 21:23:21,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:23:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-23 21:23:21,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-23 21:23:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-23 21:23:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-09-23 21:23:21,109 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 162 [2018-09-23 21:23:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:21,109 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-09-23 21:23:21,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:23:21,109 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-09-23 21:23:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-23 21:23:21,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:21,110 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:21,110 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:21,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash 429646508, now seen corresponding path program 73 times [2018-09-23 21:23:21,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:21,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:21,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:21,111 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:21,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:21,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:23,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:23,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:23,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:23,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:23,738 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:23,738 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 21:23:23,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 21:23:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 21:23:23,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:23:23,739 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 77 states. [2018-09-23 21:23:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:23,951 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2018-09-23 21:23:23,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:23:23,952 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 164 [2018-09-23 21:23:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:23,953 INFO L225 Difference]: With dead ends: 181 [2018-09-23 21:23:23,953 INFO L226 Difference]: Without dead ends: 167 [2018-09-23 21:23:23,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:23:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-23 21:23:23,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-23 21:23:23,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 21:23:23,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2018-09-23 21:23:23,959 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 164 [2018-09-23 21:23:23,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:23,959 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2018-09-23 21:23:23,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 21:23:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2018-09-23 21:23:23,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-23 21:23:23,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:23,960 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:23,960 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:23,960 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:23,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2114699352, now seen corresponding path program 74 times [2018-09-23 21:23:23,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:23,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:23,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:23,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:23,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:26,027 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:26,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:26,034 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:26,136 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:26,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:26,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:26,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:26,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:26,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 21:23:26,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:23:26,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:23:26,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:23:26,211 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 78 states. [2018-09-23 21:23:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:26,373 INFO L93 Difference]: Finished difference Result 183 states and 187 transitions. [2018-09-23 21:23:26,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 21:23:26,373 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 166 [2018-09-23 21:23:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:26,374 INFO L225 Difference]: With dead ends: 183 [2018-09-23 21:23:26,375 INFO L226 Difference]: Without dead ends: 169 [2018-09-23 21:23:26,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:23:26,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-23 21:23:26,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-23 21:23:26,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-23 21:23:26,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 171 transitions. [2018-09-23 21:23:26,381 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 171 transitions. Word has length 166 [2018-09-23 21:23:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:26,381 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 171 transitions. [2018-09-23 21:23:26,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:23:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 171 transitions. [2018-09-23 21:23:26,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-23 21:23:26,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:26,382 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:26,382 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:26,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:26,383 INFO L82 PathProgramCache]: Analyzing trace with hash 900287908, now seen corresponding path program 75 times [2018-09-23 21:23:26,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:26,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:26,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:26,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:26,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:28,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:28,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:28,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:29,022 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2018-09-23 21:23:29,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:29,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:29,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5870 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:29,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:29,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 21:23:29,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 21:23:29,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 21:23:29,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:23:29,076 INFO L87 Difference]: Start difference. First operand 169 states and 171 transitions. Second operand 79 states. [2018-09-23 21:23:29,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:29,237 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2018-09-23 21:23:29,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 21:23:29,238 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 168 [2018-09-23 21:23:29,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:29,239 INFO L225 Difference]: With dead ends: 185 [2018-09-23 21:23:29,239 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 21:23:29,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:23:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 21:23:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-23 21:23:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-23 21:23:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-23 21:23:29,245 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 168 [2018-09-23 21:23:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:29,245 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-23 21:23:29,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 21:23:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-23 21:23:29,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-23 21:23:29,245 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:29,246 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:29,246 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:29,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:29,246 INFO L82 PathProgramCache]: Analyzing trace with hash -799880032, now seen corresponding path program 76 times [2018-09-23 21:23:29,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:29,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:29,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:29,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:29,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:31,441 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:31,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:31,448 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:31,556 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:31,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:31,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6024 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:31,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:31,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 21:23:31,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:23:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:23:31,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:23:31,624 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 80 states. [2018-09-23 21:23:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:31,780 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2018-09-23 21:23:31,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 21:23:31,780 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 170 [2018-09-23 21:23:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:31,781 INFO L225 Difference]: With dead ends: 187 [2018-09-23 21:23:31,781 INFO L226 Difference]: Without dead ends: 173 [2018-09-23 21:23:31,781 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:23:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-23 21:23:31,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-23 21:23:31,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 21:23:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2018-09-23 21:23:31,788 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2018-09-23 21:23:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:31,788 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2018-09-23 21:23:31,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:23:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2018-09-23 21:23:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-23 21:23:31,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:31,790 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:31,790 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:31,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:31,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1721269404, now seen corresponding path program 77 times [2018-09-23 21:23:31,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:31,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:31,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:31,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:31,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:34,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:34,325 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:34,333 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:34,551 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-23 21:23:34,551 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:34,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6180 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:34,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:34,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 21:23:34,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 21:23:34,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 21:23:34,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:23:34,610 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 81 states. [2018-09-23 21:23:34,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:34,795 INFO L93 Difference]: Finished difference Result 189 states and 193 transitions. [2018-09-23 21:23:34,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 21:23:34,796 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 172 [2018-09-23 21:23:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:34,797 INFO L225 Difference]: With dead ends: 189 [2018-09-23 21:23:34,797 INFO L226 Difference]: Without dead ends: 175 [2018-09-23 21:23:34,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:23:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-23 21:23:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-23 21:23:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-23 21:23:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-23 21:23:34,803 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 172 [2018-09-23 21:23:34,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:34,804 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-23 21:23:34,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 21:23:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-23 21:23:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-23 21:23:34,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:34,805 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:34,805 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:34,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:34,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2110644840, now seen corresponding path program 78 times [2018-09-23 21:23:34,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:34,806 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:34,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:34,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:34,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:37,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:37,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:37,172 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:37,402 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 80 check-sat command(s) [2018-09-23 21:23:37,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:37,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6338 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:37,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:37,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 21:23:37,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:23:37,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:23:37,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:23:37,458 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 82 states. [2018-09-23 21:23:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:37,748 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2018-09-23 21:23:37,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:23:37,749 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 174 [2018-09-23 21:23:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:37,749 INFO L225 Difference]: With dead ends: 191 [2018-09-23 21:23:37,750 INFO L226 Difference]: Without dead ends: 177 [2018-09-23 21:23:37,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:23:37,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-23 21:23:37,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-23 21:23:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-23 21:23:37,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2018-09-23 21:23:37,756 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 174 [2018-09-23 21:23:37,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:37,756 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2018-09-23 21:23:37,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:23:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2018-09-23 21:23:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-23 21:23:37,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:37,757 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:37,757 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:37,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:37,757 INFO L82 PathProgramCache]: Analyzing trace with hash 501706644, now seen corresponding path program 79 times [2018-09-23 21:23:37,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:37,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:37,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:37,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:37,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:40,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:40,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:40,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:40,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:40,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6498 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:40,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:40,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 21:23:40,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 21:23:40,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 21:23:40,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:23:40,523 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 83 states. [2018-09-23 21:23:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:40,731 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-09-23 21:23:40,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 21:23:40,731 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 176 [2018-09-23 21:23:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:40,732 INFO L225 Difference]: With dead ends: 193 [2018-09-23 21:23:40,732 INFO L226 Difference]: Without dead ends: 179 [2018-09-23 21:23:40,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:23:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-23 21:23:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-23 21:23:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-23 21:23:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2018-09-23 21:23:40,738 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2018-09-23 21:23:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:40,738 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2018-09-23 21:23:40,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 21:23:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2018-09-23 21:23:40,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-23 21:23:40,739 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:40,739 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:40,739 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:40,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:40,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1584385392, now seen corresponding path program 80 times [2018-09-23 21:23:40,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:40,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:40,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:40,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:40,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:43,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:43,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:43,303 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:43,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:43,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:43,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:43,483 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:43,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 21:23:43,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:23:43,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:23:43,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:23:43,485 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 84 states. [2018-09-23 21:23:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:43,791 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-09-23 21:23:43,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 21:23:43,791 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 178 [2018-09-23 21:23:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:43,793 INFO L225 Difference]: With dead ends: 195 [2018-09-23 21:23:43,793 INFO L226 Difference]: Without dead ends: 181 [2018-09-23 21:23:43,793 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:23:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-23 21:23:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-23 21:23:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 21:23:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-23 21:23:43,799 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2018-09-23 21:23:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:43,800 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-23 21:23:43,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:23:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-23 21:23:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-23 21:23:43,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:43,800 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:43,801 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:43,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:43,801 INFO L82 PathProgramCache]: Analyzing trace with hash -569104756, now seen corresponding path program 81 times [2018-09-23 21:23:43,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:43,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:43,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:43,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:43,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:46,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:46,282 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:46,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:46,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:46,544 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 83 check-sat command(s) [2018-09-23 21:23:46,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:46,549 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6824 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:46,619 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:46,620 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 21:23:46,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 21:23:46,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 21:23:46,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:23:46,622 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 85 states. [2018-09-23 21:23:46,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:46,816 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2018-09-23 21:23:46,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 21:23:46,816 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 180 [2018-09-23 21:23:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:46,817 INFO L225 Difference]: With dead ends: 197 [2018-09-23 21:23:46,817 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 21:23:46,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:23:46,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 21:23:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-23 21:23:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-23 21:23:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2018-09-23 21:23:46,824 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 180 [2018-09-23 21:23:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:46,825 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2018-09-23 21:23:46,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 21:23:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2018-09-23 21:23:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-23 21:23:46,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:46,826 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:46,826 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:46,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:46,827 INFO L82 PathProgramCache]: Analyzing trace with hash 158010248, now seen corresponding path program 82 times [2018-09-23 21:23:46,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:46,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:46,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:46,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:46,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:49,596 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:49,596 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:49,603 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:49,720 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:49,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:49,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6990 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:49,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:49,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 21:23:49,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:23:49,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:23:49,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:23:49,778 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 86 states. [2018-09-23 21:23:49,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:49,994 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2018-09-23 21:23:49,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 21:23:49,995 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 182 [2018-09-23 21:23:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:49,996 INFO L225 Difference]: With dead ends: 199 [2018-09-23 21:23:49,997 INFO L226 Difference]: Without dead ends: 185 [2018-09-23 21:23:49,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:23:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-23 21:23:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-23 21:23:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-23 21:23:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-23 21:23:50,004 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2018-09-23 21:23:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:50,004 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-23 21:23:50,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:23:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-23 21:23:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-23 21:23:50,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:50,005 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:50,006 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:50,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:50,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1164140156, now seen corresponding path program 83 times [2018-09-23 21:23:50,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:50,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:50,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:50,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:50,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:52,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:52,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:52,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:52,874 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-23 21:23:52,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:52,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 7158 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:52,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:52,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 21:23:52,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 21:23:52,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 21:23:52,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:23:52,944 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 87 states. [2018-09-23 21:23:53,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:53,340 INFO L93 Difference]: Finished difference Result 201 states and 205 transitions. [2018-09-23 21:23:53,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 21:23:53,340 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 184 [2018-09-23 21:23:53,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:53,341 INFO L225 Difference]: With dead ends: 201 [2018-09-23 21:23:53,341 INFO L226 Difference]: Without dead ends: 187 [2018-09-23 21:23:53,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:23:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-23 21:23:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-23 21:23:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-23 21:23:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2018-09-23 21:23:53,349 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 184 [2018-09-23 21:23:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:53,349 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2018-09-23 21:23:53,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 21:23:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2018-09-23 21:23:53,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-23 21:23:53,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:53,350 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:53,351 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:53,351 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:53,351 INFO L82 PathProgramCache]: Analyzing trace with hash -440358784, now seen corresponding path program 84 times [2018-09-23 21:23:53,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:53,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:53,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:53,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:53,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:56,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:56,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:56,114 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:56,366 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-23 21:23:56,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:56,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7328 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:56,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:56,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 21:23:56,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:23:56,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:23:56,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:23:56,426 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 88 states. [2018-09-23 21:23:56,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:56,724 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2018-09-23 21:23:56,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 21:23:56,725 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 186 [2018-09-23 21:23:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:56,726 INFO L225 Difference]: With dead ends: 203 [2018-09-23 21:23:56,726 INFO L226 Difference]: Without dead ends: 189 [2018-09-23 21:23:56,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:23:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-23 21:23:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-23 21:23:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-23 21:23:56,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-09-23 21:23:56,734 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 186 [2018-09-23 21:23:56,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:56,735 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-09-23 21:23:56,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:23:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-09-23 21:23:56,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-23 21:23:56,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:56,736 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:23:56,736 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:56,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:56,736 INFO L82 PathProgramCache]: Analyzing trace with hash -671162244, now seen corresponding path program 85 times [2018-09-23 21:23:56,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:56,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:56,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:56,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:56,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:23:59,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:59,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:23:59,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:59,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7500 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:00,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:00,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 21:24:00,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 21:24:00,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 21:24:00,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:24:00,052 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 89 states. [2018-09-23 21:24:00,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:00,278 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2018-09-23 21:24:00,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 21:24:00,278 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 188 [2018-09-23 21:24:00,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:00,279 INFO L225 Difference]: With dead ends: 205 [2018-09-23 21:24:00,279 INFO L226 Difference]: Without dead ends: 191 [2018-09-23 21:24:00,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:24:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-23 21:24:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-23 21:24:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-23 21:24:00,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-23 21:24:00,286 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 188 [2018-09-23 21:24:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:00,286 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-23 21:24:00,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 21:24:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-23 21:24:00,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-23 21:24:00,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:00,287 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:00,287 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:00,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:00,287 INFO L82 PathProgramCache]: Analyzing trace with hash 865012088, now seen corresponding path program 86 times [2018-09-23 21:24:00,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:00,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:00,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:00,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:00,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:03,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:03,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:03,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:03,382 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:03,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:03,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7674 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:03,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:03,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 21:24:03,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:24:03,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:24:03,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:24:03,442 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 90 states. [2018-09-23 21:24:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:03,656 INFO L93 Difference]: Finished difference Result 207 states and 211 transitions. [2018-09-23 21:24:03,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 21:24:03,656 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 190 [2018-09-23 21:24:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:03,657 INFO L225 Difference]: With dead ends: 207 [2018-09-23 21:24:03,657 INFO L226 Difference]: Without dead ends: 193 [2018-09-23 21:24:03,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:24:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-23 21:24:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-23 21:24:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-23 21:24:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 195 transitions. [2018-09-23 21:24:03,664 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 195 transitions. Word has length 190 [2018-09-23 21:24:03,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:03,664 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 195 transitions. [2018-09-23 21:24:03,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:24:03,664 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 195 transitions. [2018-09-23 21:24:03,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-23 21:24:03,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:03,665 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:03,665 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:03,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:03,666 INFO L82 PathProgramCache]: Analyzing trace with hash -340204684, now seen corresponding path program 87 times [2018-09-23 21:24:03,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:03,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:03,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:03,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:03,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:03,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:06,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:06,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:06,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:06,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 89 check-sat command(s) [2018-09-23 21:24:06,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:06,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 7850 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:06,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:06,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 21:24:06,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 21:24:06,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 21:24:06,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:24:06,934 INFO L87 Difference]: Start difference. First operand 193 states and 195 transitions. Second operand 91 states. [2018-09-23 21:24:07,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:07,238 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2018-09-23 21:24:07,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 21:24:07,239 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 192 [2018-09-23 21:24:07,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:07,240 INFO L225 Difference]: With dead ends: 209 [2018-09-23 21:24:07,240 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 21:24:07,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:24:07,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 21:24:07,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-23 21:24:07,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-23 21:24:07,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-09-23 21:24:07,246 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 192 [2018-09-23 21:24:07,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:07,246 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-09-23 21:24:07,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 21:24:07,246 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-09-23 21:24:07,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-23 21:24:07,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:07,247 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:07,247 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:07,247 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:07,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1087647344, now seen corresponding path program 88 times [2018-09-23 21:24:07,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:07,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:07,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:07,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:07,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:10,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:10,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:10,485 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:10,605 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:10,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:10,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:10,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8028 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:10,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:10,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 21:24:10,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 21:24:10,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 21:24:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:24:10,667 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 92 states. [2018-09-23 21:24:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:10,899 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-09-23 21:24:10,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 21:24:10,899 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 194 [2018-09-23 21:24:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:10,900 INFO L225 Difference]: With dead ends: 211 [2018-09-23 21:24:10,901 INFO L226 Difference]: Without dead ends: 197 [2018-09-23 21:24:10,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:24:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-23 21:24:10,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-23 21:24:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-23 21:24:10,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2018-09-23 21:24:10,908 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 194 [2018-09-23 21:24:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:10,908 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2018-09-23 21:24:10,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 21:24:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2018-09-23 21:24:10,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-23 21:24:10,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:10,909 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:10,909 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:10,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:10,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1136088468, now seen corresponding path program 89 times [2018-09-23 21:24:10,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:10,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:10,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:10,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:10,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:14,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:14,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:14,260 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:14,537 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 91 check-sat command(s) [2018-09-23 21:24:14,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:14,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8208 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:14,599 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:14,599 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-23 21:24:14,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 21:24:14,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 21:24:14,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:24:14,601 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand 93 states. [2018-09-23 21:24:14,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:14,921 INFO L93 Difference]: Finished difference Result 213 states and 217 transitions. [2018-09-23 21:24:14,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 21:24:14,922 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 196 [2018-09-23 21:24:14,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:14,923 INFO L225 Difference]: With dead ends: 213 [2018-09-23 21:24:14,923 INFO L226 Difference]: Without dead ends: 199 [2018-09-23 21:24:14,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:24:14,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-23 21:24:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-23 21:24:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-23 21:24:14,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2018-09-23 21:24:14,931 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 196 [2018-09-23 21:24:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:14,931 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2018-09-23 21:24:14,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 21:24:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2018-09-23 21:24:14,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-23 21:24:14,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:14,932 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:14,932 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:14,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:14,932 INFO L82 PathProgramCache]: Analyzing trace with hash 747509608, now seen corresponding path program 90 times [2018-09-23 21:24:14,932 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:14,932 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:14,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:14,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:14,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:18,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:18,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:18,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:18,009 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:18,292 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 92 check-sat command(s) [2018-09-23 21:24:18,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:18,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8390 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:18,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:18,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 21:24:18,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 21:24:18,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 21:24:18,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:24:18,356 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 94 states. [2018-09-23 21:24:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:18,606 INFO L93 Difference]: Finished difference Result 215 states and 219 transitions. [2018-09-23 21:24:18,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 21:24:18,607 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 198 [2018-09-23 21:24:18,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:18,607 INFO L225 Difference]: With dead ends: 215 [2018-09-23 21:24:18,607 INFO L226 Difference]: Without dead ends: 201 [2018-09-23 21:24:18,608 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:24:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-23 21:24:18,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-23 21:24:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-23 21:24:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-09-23 21:24:18,615 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 198 [2018-09-23 21:24:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:18,615 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-09-23 21:24:18,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 21:24:18,615 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-09-23 21:24:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-23 21:24:18,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:18,616 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:18,616 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:18,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:18,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1590938268, now seen corresponding path program 91 times [2018-09-23 21:24:18,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:18,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:18,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:18,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:18,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:22,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:22,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:22,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:22,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:22,809 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8574 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:22,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:22,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-23 21:24:22,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 21:24:22,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 21:24:22,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:24:22,885 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 95 states. [2018-09-23 21:24:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:23,116 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2018-09-23 21:24:23,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 21:24:23,116 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 200 [2018-09-23 21:24:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:23,117 INFO L225 Difference]: With dead ends: 217 [2018-09-23 21:24:23,118 INFO L226 Difference]: Without dead ends: 203 [2018-09-23 21:24:23,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:24:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-23 21:24:23,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-23 21:24:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-23 21:24:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2018-09-23 21:24:23,126 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 200 [2018-09-23 21:24:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:23,126 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2018-09-23 21:24:23,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 21:24:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2018-09-23 21:24:23,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-23 21:24:23,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:23,127 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:23,127 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:23,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:23,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1723516000, now seen corresponding path program 92 times [2018-09-23 21:24:23,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:23,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:23,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:23,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:23,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:26,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:26,740 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:26,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:26,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:26,877 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:26,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:26,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8760 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:26,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:26,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 21:24:26,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 21:24:26,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 21:24:26,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:24:26,941 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 96 states. [2018-09-23 21:24:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:27,182 INFO L93 Difference]: Finished difference Result 219 states and 223 transitions. [2018-09-23 21:24:27,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 21:24:27,182 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 202 [2018-09-23 21:24:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:27,184 INFO L225 Difference]: With dead ends: 219 [2018-09-23 21:24:27,184 INFO L226 Difference]: Without dead ends: 205 [2018-09-23 21:24:27,185 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:24:27,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-23 21:24:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-23 21:24:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-23 21:24:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-23 21:24:27,193 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2018-09-23 21:24:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:27,193 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-23 21:24:27,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 21:24:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-23 21:24:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-23 21:24:27,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:27,194 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:27,194 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:27,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:27,194 INFO L82 PathProgramCache]: Analyzing trace with hash 48333916, now seen corresponding path program 93 times [2018-09-23 21:24:27,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:27,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:27,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:27,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:27,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:30,743 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:30,743 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:30,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:31,064 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 95 check-sat command(s) [2018-09-23 21:24:31,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:31,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:31,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8948 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:31,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:31,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-23 21:24:31,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 21:24:31,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 21:24:31,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:24:31,129 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 97 states. [2018-09-23 21:24:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:31,351 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2018-09-23 21:24:31,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 21:24:31,352 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 204 [2018-09-23 21:24:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:31,353 INFO L225 Difference]: With dead ends: 221 [2018-09-23 21:24:31,353 INFO L226 Difference]: Without dead ends: 207 [2018-09-23 21:24:31,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:24:31,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-23 21:24:31,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-23 21:24:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-23 21:24:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2018-09-23 21:24:31,359 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2018-09-23 21:24:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:31,359 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2018-09-23 21:24:31,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 21:24:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2018-09-23 21:24:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-23 21:24:31,360 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:31,361 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:31,361 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:31,361 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:31,361 INFO L82 PathProgramCache]: Analyzing trace with hash 811087192, now seen corresponding path program 94 times [2018-09-23 21:24:31,361 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:31,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:31,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:31,362 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:31,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:35,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:35,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:35,065 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:35,201 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:35,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:35,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9138 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:35,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:35,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 21:24:35,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 21:24:35,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 21:24:35,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:24:35,265 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 98 states. [2018-09-23 21:24:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:35,486 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2018-09-23 21:24:35,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 21:24:35,486 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 206 [2018-09-23 21:24:35,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:35,488 INFO L225 Difference]: With dead ends: 223 [2018-09-23 21:24:35,488 INFO L226 Difference]: Without dead ends: 209 [2018-09-23 21:24:35,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:24:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-23 21:24:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-23 21:24:35,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-23 21:24:35,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2018-09-23 21:24:35,495 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2018-09-23 21:24:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:35,495 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2018-09-23 21:24:35,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 21:24:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2018-09-23 21:24:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-23 21:24:35,496 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:35,496 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:35,496 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:35,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash -622422188, now seen corresponding path program 95 times [2018-09-23 21:24:35,496 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:35,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:35,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:35,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:35,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:38,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:38,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:38,874 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:39,171 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 97 check-sat command(s) [2018-09-23 21:24:39,171 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:39,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9330 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:39,235 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:39,236 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-23 21:24:39,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 21:24:39,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 21:24:39,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:24:39,237 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand 99 states. [2018-09-23 21:24:39,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:39,595 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-09-23 21:24:39,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 21:24:39,596 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 208 [2018-09-23 21:24:39,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:39,597 INFO L225 Difference]: With dead ends: 225 [2018-09-23 21:24:39,597 INFO L226 Difference]: Without dead ends: 211 [2018-09-23 21:24:39,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:24:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-23 21:24:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-23 21:24:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-23 21:24:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-23 21:24:39,604 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 208 [2018-09-23 21:24:39,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:39,604 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-23 21:24:39,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 21:24:39,604 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-23 21:24:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-23 21:24:39,605 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:39,605 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:39,605 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:39,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:39,605 INFO L82 PathProgramCache]: Analyzing trace with hash 459565648, now seen corresponding path program 96 times [2018-09-23 21:24:39,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:39,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:39,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:39,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:39,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:43,072 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:43,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:43,080 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:43,387 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 98 check-sat command(s) [2018-09-23 21:24:43,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:43,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9524 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:43,453 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:43,453 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-23 21:24:43,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 21:24:43,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 21:24:43,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:24:43,455 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 100 states. [2018-09-23 21:24:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:43,758 INFO L93 Difference]: Finished difference Result 227 states and 231 transitions. [2018-09-23 21:24:43,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 21:24:43,759 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 210 [2018-09-23 21:24:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:43,760 INFO L225 Difference]: With dead ends: 227 [2018-09-23 21:24:43,760 INFO L226 Difference]: Without dead ends: 213 [2018-09-23 21:24:43,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:24:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-23 21:24:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-23 21:24:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-23 21:24:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2018-09-23 21:24:43,769 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 210 [2018-09-23 21:24:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:43,769 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2018-09-23 21:24:43,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 21:24:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2018-09-23 21:24:43,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-23 21:24:43,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:43,770 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:43,771 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:43,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:43,771 INFO L82 PathProgramCache]: Analyzing trace with hash 867790412, now seen corresponding path program 97 times [2018-09-23 21:24:43,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:43,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:43,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:43,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:43,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:47,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:47,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:47,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:47,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:47,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:47,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-23 21:24:47,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 21:24:47,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 21:24:47,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:24:47,785 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 101 states. [2018-09-23 21:24:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:48,107 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-09-23 21:24:48,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 21:24:48,108 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 212 [2018-09-23 21:24:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:48,109 INFO L225 Difference]: With dead ends: 229 [2018-09-23 21:24:48,110 INFO L226 Difference]: Without dead ends: 215 [2018-09-23 21:24:48,111 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:24:48,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-23 21:24:48,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-23 21:24:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-23 21:24:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-09-23 21:24:48,119 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 212 [2018-09-23 21:24:48,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:48,120 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-09-23 21:24:48,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 21:24:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-09-23 21:24:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-23 21:24:48,120 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:48,120 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:48,121 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:48,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:48,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1965202616, now seen corresponding path program 98 times [2018-09-23 21:24:48,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:48,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:48,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:48,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:48,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:51,907 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:51,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:51,915 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:52,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:52,059 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:52,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9918 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:52,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:52,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-23 21:24:52,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 21:24:52,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 21:24:52,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:24:52,139 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 102 states. [2018-09-23 21:24:52,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:52,454 INFO L93 Difference]: Finished difference Result 231 states and 235 transitions. [2018-09-23 21:24:52,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 21:24:52,455 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 214 [2018-09-23 21:24:52,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:52,456 INFO L225 Difference]: With dead ends: 231 [2018-09-23 21:24:52,456 INFO L226 Difference]: Without dead ends: 217 [2018-09-23 21:24:52,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:24:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-23 21:24:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-23 21:24:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-23 21:24:52,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2018-09-23 21:24:52,465 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 214 [2018-09-23 21:24:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:52,466 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2018-09-23 21:24:52,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 21:24:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2018-09-23 21:24:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-23 21:24:52,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:52,467 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:52,467 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:52,467 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:52,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1462236860, now seen corresponding path program 99 times [2018-09-23 21:24:52,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:52,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:52,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:52,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:52,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:56,423 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:56,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:24:56,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:56,780 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 101 check-sat command(s) [2018-09-23 21:24:56,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:56,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10118 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:24:56,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:56,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-23 21:24:56,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 21:24:56,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 21:24:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:24:56,850 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 103 states. [2018-09-23 21:24:57,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:57,253 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2018-09-23 21:24:57,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 21:24:57,254 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 216 [2018-09-23 21:24:57,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:57,255 INFO L225 Difference]: With dead ends: 233 [2018-09-23 21:24:57,255 INFO L226 Difference]: Without dead ends: 219 [2018-09-23 21:24:57,255 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:24:57,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-23 21:24:57,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-23 21:24:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-23 21:24:57,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2018-09-23 21:24:57,264 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 216 [2018-09-23 21:24:57,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:57,264 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2018-09-23 21:24:57,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 21:24:57,264 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2018-09-23 21:24:57,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-23 21:24:57,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:57,265 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:24:57,265 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:57,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:57,266 INFO L82 PathProgramCache]: Analyzing trace with hash 851517504, now seen corresponding path program 100 times [2018-09-23 21:24:57,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:57,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:57,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:57,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:57,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:01,355 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:01,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:01,363 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:01,508 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:01,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:01,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10320 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:01,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:01,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-23 21:25:01,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 21:25:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 21:25:01,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:25:01,578 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 104 states. [2018-09-23 21:25:01,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:01,999 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2018-09-23 21:25:01,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 21:25:02,000 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 218 [2018-09-23 21:25:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:02,000 INFO L225 Difference]: With dead ends: 235 [2018-09-23 21:25:02,000 INFO L226 Difference]: Without dead ends: 221 [2018-09-23 21:25:02,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:25:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-23 21:25:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-23 21:25:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-23 21:25:02,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-23 21:25:02,008 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2018-09-23 21:25:02,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:02,008 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-23 21:25:02,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 21:25:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-23 21:25:02,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-23 21:25:02,009 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:02,009 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:25:02,010 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:02,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:02,010 INFO L82 PathProgramCache]: Analyzing trace with hash -423598020, now seen corresponding path program 101 times [2018-09-23 21:25:02,010 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:02,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:02,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:02,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:02,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:06,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:06,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:06,169 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:06,510 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 103 check-sat command(s) [2018-09-23 21:25:06,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:06,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10524 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:06,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:06,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-23 21:25:06,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-23 21:25:06,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-23 21:25:06,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 21:25:06,581 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 105 states. [2018-09-23 21:25:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:07,044 INFO L93 Difference]: Finished difference Result 237 states and 241 transitions. [2018-09-23 21:25:07,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-23 21:25:07,044 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 220 [2018-09-23 21:25:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:07,045 INFO L225 Difference]: With dead ends: 237 [2018-09-23 21:25:07,045 INFO L226 Difference]: Without dead ends: 223 [2018-09-23 21:25:07,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 21:25:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-23 21:25:07,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-23 21:25:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-23 21:25:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2018-09-23 21:25:07,054 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 220 [2018-09-23 21:25:07,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:07,054 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2018-09-23 21:25:07,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-23 21:25:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2018-09-23 21:25:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-23 21:25:07,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:07,055 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:25:07,055 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:07,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:07,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1743937224, now seen corresponding path program 102 times [2018-09-23 21:25:07,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:07,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:07,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:07,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:07,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:11,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:11,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:11,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:11,670 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 104 check-sat command(s) [2018-09-23 21:25:11,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:11,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 10730 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:11,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:11,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-23 21:25:11,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 21:25:11,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 21:25:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:25:11,749 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 106 states. [2018-09-23 21:25:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:12,229 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2018-09-23 21:25:12,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-23 21:25:12,229 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 222 [2018-09-23 21:25:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:12,230 INFO L225 Difference]: With dead ends: 239 [2018-09-23 21:25:12,230 INFO L226 Difference]: Without dead ends: 225 [2018-09-23 21:25:12,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:25:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-23 21:25:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-23 21:25:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-23 21:25:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-09-23 21:25:12,237 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 222 [2018-09-23 21:25:12,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:12,237 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-09-23 21:25:12,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 21:25:12,237 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-09-23 21:25:12,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-23 21:25:12,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:12,238 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:25:12,238 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:12,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:12,238 INFO L82 PathProgramCache]: Analyzing trace with hash 720407348, now seen corresponding path program 103 times [2018-09-23 21:25:12,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:12,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:12,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:12,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:12,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:16,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:16,453 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:16,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:16,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10938 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:16,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:16,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-23 21:25:16,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 21:25:16,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 21:25:16,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:25:16,726 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 107 states. [2018-09-23 21:25:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:17,116 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2018-09-23 21:25:17,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 21:25:17,116 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 224 [2018-09-23 21:25:17,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:17,117 INFO L225 Difference]: With dead ends: 241 [2018-09-23 21:25:17,117 INFO L226 Difference]: Without dead ends: 227 [2018-09-23 21:25:17,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:25:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-23 21:25:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-23 21:25:17,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-23 21:25:17,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2018-09-23 21:25:17,127 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 224 [2018-09-23 21:25:17,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:17,127 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2018-09-23 21:25:17,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 21:25:17,127 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2018-09-23 21:25:17,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-23 21:25:17,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:17,128 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:25:17,128 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:17,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:17,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1866406352, now seen corresponding path program 104 times [2018-09-23 21:25:17,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:17,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:17,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:17,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:17,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:21,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:21,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:21,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:21,547 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:21,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:21,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 11148 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:21,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:21,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-23 21:25:21,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 21:25:21,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 21:25:21,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:25:21,625 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 108 states. [2018-09-23 21:25:21,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:21,973 INFO L93 Difference]: Finished difference Result 243 states and 247 transitions. [2018-09-23 21:25:21,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-23 21:25:21,973 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 226 [2018-09-23 21:25:21,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:21,974 INFO L225 Difference]: With dead ends: 243 [2018-09-23 21:25:21,974 INFO L226 Difference]: Without dead ends: 229 [2018-09-23 21:25:21,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:25:21,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-23 21:25:21,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-23 21:25:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-23 21:25:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 231 transitions. [2018-09-23 21:25:21,981 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 231 transitions. Word has length 226 [2018-09-23 21:25:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:21,981 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 231 transitions. [2018-09-23 21:25:21,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 21:25:21,981 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 231 transitions. [2018-09-23 21:25:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-23 21:25:21,982 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:21,982 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:25:21,982 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:21,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:21,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1008307668, now seen corresponding path program 105 times [2018-09-23 21:25:21,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:21,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:21,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:21,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:21,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:26,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:26,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:26,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:26,677 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 107 check-sat command(s) [2018-09-23 21:25:26,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:26,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 11360 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:26,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:26,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-23 21:25:26,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-23 21:25:26,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-23 21:25:26,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 21:25:26,749 INFO L87 Difference]: Start difference. First operand 229 states and 231 transitions. Second operand 109 states. [2018-09-23 21:25:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:27,232 INFO L93 Difference]: Finished difference Result 245 states and 249 transitions. [2018-09-23 21:25:27,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-23 21:25:27,232 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 228 [2018-09-23 21:25:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:27,233 INFO L225 Difference]: With dead ends: 245 [2018-09-23 21:25:27,233 INFO L226 Difference]: Without dead ends: 231 [2018-09-23 21:25:27,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 21:25:27,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-23 21:25:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-23 21:25:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-23 21:25:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-09-23 21:25:27,240 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 228 [2018-09-23 21:25:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:27,240 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-09-23 21:25:27,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-23 21:25:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-09-23 21:25:27,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-23 21:25:27,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:27,241 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:25:27,241 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:27,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:27,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1009193176, now seen corresponding path program 106 times [2018-09-23 21:25:27,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:27,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:27,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:27,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:27,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:31,814 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:31,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:31,823 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:31,973 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:31,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:31,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 11574 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:32,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:32,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-23 21:25:32,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 21:25:32,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 21:25:32,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:25:32,047 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 110 states. [2018-09-23 21:25:32,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:32,393 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-09-23 21:25:32,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-23 21:25:32,394 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 230 [2018-09-23 21:25:32,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:32,394 INFO L225 Difference]: With dead ends: 247 [2018-09-23 21:25:32,394 INFO L226 Difference]: Without dead ends: 233 [2018-09-23 21:25:32,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:25:32,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-23 21:25:32,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-23 21:25:32,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-23 21:25:32,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2018-09-23 21:25:32,401 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 230 [2018-09-23 21:25:32,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:32,401 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2018-09-23 21:25:32,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 21:25:32,401 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2018-09-23 21:25:32,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-23 21:25:32,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:32,402 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:25:32,402 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:32,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:32,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1860166364, now seen corresponding path program 107 times [2018-09-23 21:25:32,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:32,402 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:32,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:32,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:32,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11790 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:36,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:36,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:37,025 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:37,401 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 109 check-sat command(s) [2018-09-23 21:25:37,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:37,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11790 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:25:37,474 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:37,474 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-23 21:25:37,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-23 21:25:37,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-23 21:25:37,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 21:25:37,476 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand 111 states. [2018-09-23 21:25:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:37,749 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2018-09-23 21:25:37,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-23 21:25:37,750 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 232 [2018-09-23 21:25:37,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:37,751 INFO L225 Difference]: With dead ends: 249 [2018-09-23 21:25:37,751 INFO L226 Difference]: Without dead ends: 235 [2018-09-23 21:25:37,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 21:25:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-23 21:25:37,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-23 21:25:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-23 21:25:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-09-23 21:25:37,758 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 232 [2018-09-23 21:25:37,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:37,759 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-09-23 21:25:37,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-23 21:25:37,759 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-09-23 21:25:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-23 21:25:37,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:37,759 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 21:25:37,760 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:37,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash 693353504, now seen corresponding path program 108 times [2018-09-23 21:25:37,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:37,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:37,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:37,760 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:37,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY Received shutdown request... [2018-09-23 21:25:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:37,846 FATAL L265 ToolchainWalker]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:919) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:375) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:313) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-09-23 21:25:37,850 INFO L168 Benchmark]: Toolchain (without parser) took 237469.59 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 245.9 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 61.0 MB). Peak memory consumption was 306.9 MB. Max. memory is 7.1 GB. [2018-09-23 21:25:37,852 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:25:37,852 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.27 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:25:37,853 INFO L168 Benchmark]: Boogie Preprocessor took 24.49 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:25:37,853 INFO L168 Benchmark]: RCFGBuilder took 246.83 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:25:37,853 INFO L168 Benchmark]: TraceAbstraction took 237148.92 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 245.9 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 39.9 MB). Peak memory consumption was 285.8 MB. Max. memory is 7.1 GB. [2018-09-23 21:25:37,855 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.27 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 24.49 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 246.83 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 237148.92 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 245.9 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 39.9 MB). Peak memory consumption was 285.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/fragtest_simple.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-25-37-864.csv Completed graceful shutdown