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/const1.i_3.bplTransformedIcfg_BEv2_6.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:07:01,287 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:07:01,289 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:07:01,301 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:07:01,302 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:07:01,303 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:07:01,304 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:07:01,306 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:07:01,308 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:07:01,309 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:07:01,310 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 20:07:01,335 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:07:01,356 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:07:01,357 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:07:01,358 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:07:01,358 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:07:01,359 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:07:01,359 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:07:01,359 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:07:01,359 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:07:01,360 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:07:01,360 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:07:01,360 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:07:01,360 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:07:01,361 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:07:01,362 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:07:01,362 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:07:01,362 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:07:01,362 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:07:01,363 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:07:01,364 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:07:01,364 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:07:01,364 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:07:01,364 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:07:01,364 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:07:01,365 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:07:01,365 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:07:01,365 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:07:01,365 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:07:01,366 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:07:01,366 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:07:01,366 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:07:01,441 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:07:01,458 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:07:01,464 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:07:01,466 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:07:01,467 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:07:01,468 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-09-30 20:07:01,468 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl' [2018-09-30 20:07:01,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:07:01,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:07:01,528 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:07:01,528 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:07:01,528 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:07:01,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:07:01" (1/1) ... [2018-09-30 20:07:01,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:07:01" (1/1) ... [2018-09-30 20:07:01,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:07:01,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:07:01,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:07:01,568 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:07:01,581 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:07:01" (1/1) ... [2018-09-30 20:07:01,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:07:01" (1/1) ... [2018-09-30 20:07:01,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:07:01" (1/1) ... [2018-09-30 20:07:01,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:07:01" (1/1) ... [2018-09-30 20:07:01,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:07:01" (1/1) ... [2018-09-30 20:07:01,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:07:01" (1/1) ... [2018-09-30 20:07:01,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:07:01" (1/1) ... [2018-09-30 20:07:01,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:07:01,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:07:01,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:07:01,593 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:07:01,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:07:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:07:01,660 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 20:07:01,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:07:01,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:07:01,832 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:07:01,833 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:07:01 BoogieIcfgContainer [2018-09-30 20:07:01,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:07:01,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:07:01,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:07:01,838 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:07:01,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:07:01" (1/2) ... [2018-09-30 20:07:01,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8b61a1 and model type const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:07:01, skipping insertion in model container [2018-09-30 20:07:01,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:07:01" (2/2) ... [2018-09-30 20:07:01,842 INFO L112 eAbstractionObserver]: Analyzing ICFG const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-09-30 20:07:01,852 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:07:01,859 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:07:01,910 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:07:01,911 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:07:01,911 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:07:01,911 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:07:01,911 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:07:01,912 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:07:01,912 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:07:01,912 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:07:01,912 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:07:01,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 20:07:01,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 20:07:01,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:01,935 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 20:07:01,936 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:01,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:01,943 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-30 20:07:01,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:01,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:02,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:02,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:02,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:02,111 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:07:02,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:07:02,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:07:02,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:07:02,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:07:02,132 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 20:07:02,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:02,180 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 20:07:02,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:07:02,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 20:07:02,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:02,194 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:07:02,195 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 20:07:02,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:07:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 20:07:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 20:07:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 20:07:02,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 20:07:02,239 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 20:07:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:02,240 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 20:07:02,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:07:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 20:07:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:07:02,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:02,241 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:07:02,241 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:02,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:02,242 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-09-30 20:07:02,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:02,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:02,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:02,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:02,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:02,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:02,358 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) [2018-09-30 20:07:02,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:02,412 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:02,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:02,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:07:02,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:07:02,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:07:02,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:07:02,461 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 20:07:02,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:02,530 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 20:07:02,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:07:02,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 20:07:02,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:02,532 INFO L225 Difference]: With dead ends: 8 [2018-09-30 20:07:02,532 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 20:07:02,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:07:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 20:07:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 20:07:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 20:07:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 20:07:02,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 20:07:02,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:02,536 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 20:07:02,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:07:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 20:07:02,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 20:07:02,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:02,537 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 20:07:02,538 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:02,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:02,538 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-09-30 20:07:02,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:02,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:02,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:02,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:02,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:02,644 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:02,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:02,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:02,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:02,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:02,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:02,696 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:02,696 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:07:02,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:07:02,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:07:02,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:07:02,698 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 20:07:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:02,745 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 20:07:02,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:07:02,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 20:07:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:02,746 INFO L225 Difference]: With dead ends: 9 [2018-09-30 20:07:02,746 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:07:02,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:07:02,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:07:02,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:07:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:07:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:07:02,749 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 20:07:02,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:02,750 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:07:02,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:07:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:07:02,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:07:02,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:02,751 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 20:07:02,751 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:02,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:02,752 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-09-30 20:07:02,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:02,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:02,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:02,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:02,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:02,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:02,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:02,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:02,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:07:02,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:07:02,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:02,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:02,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:02,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:02,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:07:02,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:07:02,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:07:02,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:07:02,949 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 20:07:03,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:03,006 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 20:07:03,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:07:03,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 20:07:03,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:03,010 INFO L225 Difference]: With dead ends: 10 [2018-09-30 20:07:03,010 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 20:07:03,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:07:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 20:07:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 20:07:03,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 20:07:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 20:07:03,014 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 20:07:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:03,016 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 20:07:03,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:07:03,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 20:07:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:07:03,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:03,017 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 20:07:03,017 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:03,017 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:03,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-09-30 20:07:03,018 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:03,018 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:03,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:03,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:03,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:03,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:03,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:03,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:03,315 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:07:03,330 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:07:03,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:03,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:03,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:03,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:07:03,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:07:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:07:03,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:07:03,362 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 20:07:03,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:03,446 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:07:03,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:07:03,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 20:07:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:03,447 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:07:03,448 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:07:03,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:07:03,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:07:03,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:07:03,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:07:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:07:03,452 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 20:07:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:03,453 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:07:03,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:07:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:07:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:07:03,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:03,454 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 20:07:03,454 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:03,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:03,455 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-09-30 20:07:03,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:03,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:03,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:03,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:03,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:03,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:03,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:03,603 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:03,613 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:07:03,630 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 20:07:03,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:03,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:03,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:03,666 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:07:03,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:07:03,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:07:03,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:07:03,667 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 20:07:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:03,796 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 20:07:03,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:07:03,797 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 20:07:03,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:03,798 INFO L225 Difference]: With dead ends: 12 [2018-09-30 20:07:03,798 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 20:07:03,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:07:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 20:07:03,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 20:07:03,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 20:07:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 20:07:03,803 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 20:07:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:03,803 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 20:07:03,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:07:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 20:07:03,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 20:07:03,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:03,804 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 20:07:03,804 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:03,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:03,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-09-30 20:07:03,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:03,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:03,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:03,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:03,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:03,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:03,918 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:03,932 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:07:03,977 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 20:07:03,978 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:03,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:04,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:04,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:07:04,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:07:04,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:07:04,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:07:04,010 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 20:07:04,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:04,047 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:07:04,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:07:04,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 20:07:04,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:04,050 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:07:04,050 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:07:04,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:07:04,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:07:04,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:07:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:07:04,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:07:04,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 20:07:04,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:04,054 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:07:04,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:07:04,055 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:07:04,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:07:04,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:04,055 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 20:07:04,056 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:04,056 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:04,056 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-09-30 20:07:04,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:04,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:04,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:04,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:04,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:04,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:04,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:04,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:04,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:04,517 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:04,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:07:04,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:07:04,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:07:04,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:07:04,518 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 20:07:04,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:04,581 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 20:07:04,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:07:04,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 20:07:04,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:04,582 INFO L225 Difference]: With dead ends: 14 [2018-09-30 20:07:04,582 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 20:07:04,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:07:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 20:07:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 20:07:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 20:07:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 20:07:04,586 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 20:07:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:04,586 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 20:07:04,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:07:04,587 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 20:07:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 20:07:04,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:04,588 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 20:07:04,588 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:04,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:04,588 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-09-30 20:07:04,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:04,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:04,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:04,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:04,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:04,751 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:04,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:04,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:04,783 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:04,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:04,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:04,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:04,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:07:04,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:07:04,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:07:04,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:07:04,815 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 20:07:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:04,874 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:07:04,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:07:04,875 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 20:07:04,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:04,876 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:07:04,876 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:07:04,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:07:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:07:04,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:07:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:07:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:07:04,880 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 20:07:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:04,881 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:07:04,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:07:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:07:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:07:04,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:04,882 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 20:07:04,882 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:04,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:04,882 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-09-30 20:07:04,882 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:04,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:04,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:04,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:04,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:05,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:05,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:05,191 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:07:05,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:07:05,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:05,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:05,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:05,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:07:05,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:07:05,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:07:05,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:07:05,243 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 20:07:05,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:05,284 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 20:07:05,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:07:05,285 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 20:07:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:05,286 INFO L225 Difference]: With dead ends: 16 [2018-09-30 20:07:05,286 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 20:07:05,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:07:05,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 20:07:05,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 20:07:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 20:07:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 20:07:05,290 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 20:07:05,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:05,290 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 20:07:05,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:07:05,290 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 20:07:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:07:05,291 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:05,291 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 20:07:05,292 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:05,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:05,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-09-30 20:07:05,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:05,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:05,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:05,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:05,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:05,531 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:05,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:05,540 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:07:05,568 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:07:05,568 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:05,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:05,584 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:05,604 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:05,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:07:05,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:07:05,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:07:05,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:05,606 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 20:07:05,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:05,652 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:07:05,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:07:05,653 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 20:07:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:05,653 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:07:05,654 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:07:05,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:07:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:07:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:07:05,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:07:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:07:05,658 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 20:07:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:05,658 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:07:05,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:07:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:07:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:07:05,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:05,659 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 20:07:05,659 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:05,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:05,660 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-09-30 20:07:05,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:05,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:05,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:05,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:05,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:05,898 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:05,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:05,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:05,912 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:07:05,941 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:07:05,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:05,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:05,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:05,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:07:05,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:07:05,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:07:05,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:07:05,986 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 20:07:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:06,055 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 20:07:06,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:07:06,056 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 20:07:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:06,056 INFO L225 Difference]: With dead ends: 18 [2018-09-30 20:07:06,057 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:07:06,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:07:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:07:06,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:07:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:07:06,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 20:07:06,061 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 20:07:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:06,062 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 20:07:06,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:07:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 20:07:06,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 20:07:06,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:06,063 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 20:07:06,063 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:06,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:06,063 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-09-30 20:07:06,063 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:06,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:06,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:06,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:06,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:06,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:06,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:06,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:07:06,283 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:07:06,283 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:06,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:06,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:06,323 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:07:06,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:07:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:07:06,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:07:06,325 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 20:07:06,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:06,372 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:07:06,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:07:06,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 20:07:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:06,376 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:07:06,377 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:07:06,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:07:06,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:07:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:07:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:07:06,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:07:06,381 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 20:07:06,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:06,381 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:07:06,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:07:06,381 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:07:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:07:06,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:06,382 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 20:07:06,382 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:06,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:06,383 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-09-30 20:07:06,383 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:06,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:06,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:06,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:06,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:06,605 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:06,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:06,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:06,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:06,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:06,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:06,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:07:06,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:07:06,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:07:06,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:07:06,666 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 20:07:06,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:06,962 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 20:07:06,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:07:06,963 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 20:07:06,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:06,964 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:07:06,964 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 20:07:06,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:07:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 20:07:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 20:07:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 20:07:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 20:07:06,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 20:07:06,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:06,968 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 20:07:06,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:07:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 20:07:06,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:07:06,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:06,969 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 20:07:06,970 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:06,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:06,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-09-30 20:07:06,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:06,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:06,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:06,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:06,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:07,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:07,226 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:07,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:07,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:07,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:07,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:07,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:07,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:07:07,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:07:07,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:07:07,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:07:07,326 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 20:07:07,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:07,548 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:07:07,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:07:07,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 20:07:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:07,549 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:07:07,549 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:07:07,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:07:07,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:07:07,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:07:07,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:07:07,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:07:07,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 20:07:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:07,554 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:07:07,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:07:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:07:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:07:07,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:07,555 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 20:07:07,555 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:07,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:07,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-09-30 20:07:07,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:07,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:07,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:07,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:07,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:07,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:07,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:07,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:07:07,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:07:07,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:07,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:07,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:07,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:07:07,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:07:07,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:07:07,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:07:07,861 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 20:07:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:07,903 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 20:07:07,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:07:07,903 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 20:07:07,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:07,904 INFO L225 Difference]: With dead ends: 22 [2018-09-30 20:07:07,904 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 20:07:07,905 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:07:07,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 20:07:07,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 20:07:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:07:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 20:07:07,908 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 20:07:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:07,909 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 20:07:07,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:07:07,909 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 20:07:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 20:07:07,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:07,910 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 20:07:07,910 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:07,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:07,910 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-09-30 20:07:07,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:07,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:07,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:07,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:07,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:08,509 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:08,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:08,516 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:07:08,545 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:07:08,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:08,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:08,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:08,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:07:08,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:07:08,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:07:08,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:07:08,584 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 20:07:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:08,650 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:07:08,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:07:08,651 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 20:07:08,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:08,652 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:07:08,652 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:07:08,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:07:08,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:07:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:07:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:07:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:07:08,656 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 20:07:08,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:08,656 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:07:08,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:07:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:07:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:07:08,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:08,657 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 20:07:08,657 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:08,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:08,658 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-09-30 20:07:08,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:08,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:08,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:08,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:08,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:08,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:08,953 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) [2018-09-30 20:07:08,963 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:09,035 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:07:09,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:09,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:09,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:09,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:07:09,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:07:09,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:07:09,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:07:09,075 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 20:07:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:09,169 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 20:07:09,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:07:09,170 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 20:07:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:09,171 INFO L225 Difference]: With dead ends: 24 [2018-09-30 20:07:09,171 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 20:07:09,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:07:09,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 20:07:09,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 20:07:09,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 20:07:09,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 20:07:09,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 20:07:09,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:09,175 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 20:07:09,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:07:09,175 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 20:07:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 20:07:09,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:09,176 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 20:07:09,176 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:09,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:09,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-09-30 20:07:09,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:09,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:09,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:09,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:09,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:09,456 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:09,456 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:09,456 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:09,466 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:07:09,490 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 20:07:09,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:09,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:09,506 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:09,535 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:09,535 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:07:09,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:07:09,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:07:09,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:07:09,537 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 20:07:09,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:09,621 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:07:09,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:07:09,622 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 20:07:09,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:09,623 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:07:09,623 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:07:09,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:07:09,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:07:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:07:09,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:07:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:07:09,627 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 20:07:09,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:09,628 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:07:09,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:07:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:07:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:07:09,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:09,629 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 20:07:09,629 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:09,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:09,629 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-09-30 20:07:09,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:09,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:09,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:09,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:09,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:09,937 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:09,937 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:09,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:09,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:10,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:10,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:07:10,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:07:10,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:07:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:07:10,006 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 20:07:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:10,117 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 20:07:10,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:07:10,117 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 20:07:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:10,118 INFO L225 Difference]: With dead ends: 26 [2018-09-30 20:07:10,118 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:07:10,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:07:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:07:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 20:07:10,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 20:07:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 20:07:10,122 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 20:07:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:10,123 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 20:07:10,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:07:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 20:07:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:07:10,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:10,123 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 20:07:10,124 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:10,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:10,124 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-09-30 20:07:10,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:10,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:10,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:10,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:10,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:10,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:10,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:10,456 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:10,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:10,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:10,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:10,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:10,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:07:10,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:07:10,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:07:10,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:07:10,552 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 20:07:10,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:10,630 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:07:10,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:07:10,632 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 20:07:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:10,632 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:07:10,632 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:07:10,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:07:10,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:07:10,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:07:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:07:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:07:10,636 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 20:07:10,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:10,636 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:07:10,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:07:10,636 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:07:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:07:10,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:10,637 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 20:07:10,638 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:10,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:10,638 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-09-30 20:07:10,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:10,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:10,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:10,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:10,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:10,983 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:10,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:10,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:10,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:07:11,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:07:11,015 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:11,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:11,026 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:11,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:11,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:07:11,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:07:11,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:07:11,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:07:11,052 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 20:07:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:11,102 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 20:07:11,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:07:11,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 20:07:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:11,105 INFO L225 Difference]: With dead ends: 28 [2018-09-30 20:07:11,106 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:07:11,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:07:11,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:07:11,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:07:11,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:07:11,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 20:07:11,109 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 20:07:11,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:11,109 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 20:07:11,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:07:11,110 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 20:07:11,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 20:07:11,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:11,110 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 20:07:11,110 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:11,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:11,111 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-09-30 20:07:11,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:11,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:11,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:11,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:11,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:11,464 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:11,464 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:11,464 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:11,471 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:07:11,492 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:07:11,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:11,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:11,529 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:11,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:07:11,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:07:11,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:07:11,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:07:11,531 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 20:07:11,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:11,579 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:07:11,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:07:11,579 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 20:07:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:11,580 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:07:11,580 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:07:11,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:07:11,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:07:11,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:07:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:07:11,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:07:11,586 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 20:07:11,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:11,587 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:07:11,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:07:11,587 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:07:11,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:07:11,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:11,588 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 20:07:11,588 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:11,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:11,588 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-09-30 20:07:11,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:11,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:11,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:11,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:11,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:12,073 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:12,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:12,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:12,097 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:07:12,200 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 20:07:12,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:12,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:12,214 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:12,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:12,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:07:12,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:07:12,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:07:12,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:07:12,239 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 20:07:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:12,308 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 20:07:12,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:07:12,308 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 20:07:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:12,309 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:07:12,309 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 20:07:12,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:07:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 20:07:12,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 20:07:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 20:07:12,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 20:07:12,314 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 20:07:12,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:12,315 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 20:07:12,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:07:12,315 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 20:07:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:07:12,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:12,316 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 20:07:12,316 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:12,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:12,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-09-30 20:07:12,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:12,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:12,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:12,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:12,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:12,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:12,894 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:12,901 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:07:12,929 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:07:12,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:12,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:12,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:12,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:07:12,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:07:12,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:07:12,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:07:12,975 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 20:07:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:13,041 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:07:13,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:07:13,041 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 20:07:13,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:13,042 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:07:13,042 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:07:13,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:07:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:07:13,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:07:13,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:07:13,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:07:13,047 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 20:07:13,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:13,047 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:07:13,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:07:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:07:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:07:13,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:13,048 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 20:07:13,048 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:13,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:13,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-09-30 20:07:13,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:13,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:13,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:13,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:13,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:14,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:14,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:14,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:14,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:14,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:14,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:07:14,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:07:14,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:07:14,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:07:14,464 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 20:07:14,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:14,517 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 20:07:14,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:07:14,517 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 20:07:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:14,518 INFO L225 Difference]: With dead ends: 32 [2018-09-30 20:07:14,518 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 20:07:14,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:07:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 20:07:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 20:07:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:07:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 20:07:14,523 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 20:07:14,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:14,523 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 20:07:14,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:07:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 20:07:14,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 20:07:14,523 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:14,524 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 20:07:14,524 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:14,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:14,524 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-09-30 20:07:14,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:14,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:14,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:14,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:14,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:15,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:15,351 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:15,360 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:15,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:15,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:15,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:15,439 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:15,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:07:15,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:07:15,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:07:15,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:07:15,441 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 20:07:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:15,712 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:07:15,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:07:15,712 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 20:07:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:15,713 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:07:15,713 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:07:15,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:07:15,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:07:15,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:07:15,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:07:15,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:07:15,718 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 20:07:15,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:15,718 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:07:15,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:07:15,718 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:07:15,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:07:15,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:15,719 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 20:07:15,719 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:15,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:15,720 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-09-30 20:07:15,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:15,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:15,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:15,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:15,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:16,124 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:16,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:16,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:16,132 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:07:16,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:07:16,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:16,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:16,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:16,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:07:16,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:07:16,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:07:16,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:07:16,210 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 20:07:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:16,291 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 20:07:16,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:07:16,293 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 20:07:16,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:16,293 INFO L225 Difference]: With dead ends: 34 [2018-09-30 20:07:16,293 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 20:07:16,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:07:16,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 20:07:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 20:07:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 20:07:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 20:07:16,297 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 20:07:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:16,298 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 20:07:16,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:07:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 20:07:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 20:07:16,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:16,298 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 20:07:16,299 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:16,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:16,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-09-30 20:07:16,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:16,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:16,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:16,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:16,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:16,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:16,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:16,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:07:16,746 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:07:16,747 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:16,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:16,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:16,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:07:16,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:07:16,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:07:16,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:07:16,787 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 20:07:16,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:16,844 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:07:16,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:07:16,845 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 20:07:16,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:16,846 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:07:16,846 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:07:16,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:07:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:07:16,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:07:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:07:16,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:07:16,851 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 20:07:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:16,851 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:07:16,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:07:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:07:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:07:16,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:16,852 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 20:07:16,852 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:16,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-09-30 20:07:16,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:16,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:16,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:16,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:16,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:17,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:17,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:17,593 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:07:17,632 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 20:07:17,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:17,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:17,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:17,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:07:17,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:07:17,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:07:17,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:07:17,686 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 20:07:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:17,865 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 20:07:17,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:07:17,866 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 20:07:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:17,866 INFO L225 Difference]: With dead ends: 36 [2018-09-30 20:07:17,866 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:07:17,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:07:17,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:07:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 20:07:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 20:07:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 20:07:17,869 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 20:07:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:17,870 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 20:07:17,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:07:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 20:07:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:07:17,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:17,871 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 20:07:17,871 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:17,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:17,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-09-30 20:07:17,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:17,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:17,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:17,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:17,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:18,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:18,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:18,489 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:07:18,586 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:07:18,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:18,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:18,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:18,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:07:18,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:07:18,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:07:18,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:07:18,636 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 20:07:18,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:18,729 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:07:18,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:07:18,729 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 20:07:18,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:18,729 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:07:18,730 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:07:18,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:07:18,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:07:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:07:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:07:18,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:07:18,732 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 20:07:18,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:18,733 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:07:18,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:07:18,733 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:07:18,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:07:18,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:18,733 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 20:07:18,733 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:18,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:18,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-09-30 20:07:18,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:18,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:18,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:18,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:18,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:19,313 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:19,313 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:19,314 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:19,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:19,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:19,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:19,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:07:19,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:07:19,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:07:19,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:07:19,376 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 20:07:19,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:19,431 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 20:07:19,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:07:19,432 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 20:07:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:19,432 INFO L225 Difference]: With dead ends: 38 [2018-09-30 20:07:19,432 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:07:19,433 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:07:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:07:19,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:07:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:07:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 20:07:19,437 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 20:07:19,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:19,438 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 20:07:19,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:07:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 20:07:19,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 20:07:19,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:19,438 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 20:07:19,439 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:19,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:19,439 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-09-30 20:07:19,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:19,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:19,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:19,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:19,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:20,007 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:20,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:20,014 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:20,050 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:20,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:20,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:20,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:20,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:07:20,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:07:20,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:07:20,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:07:20,092 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 20:07:20,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:20,161 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:07:20,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:07:20,162 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 20:07:20,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:20,162 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:07:20,162 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:07:20,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:07:20,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:07:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:07:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:07:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:07:20,167 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 20:07:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:20,167 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:07:20,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:07:20,167 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:07:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:07:20,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:20,168 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 20:07:20,168 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:20,168 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:20,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-09-30 20:07:20,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:20,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:20,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:20,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:20,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:21,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:21,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:21,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:07:21,300 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:07:21,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:21,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:21,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:21,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:07:21,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:07:21,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:07:21,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:07:21,331 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 20:07:21,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:21,403 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 20:07:21,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:07:21,403 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 20:07:21,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:21,404 INFO L225 Difference]: With dead ends: 40 [2018-09-30 20:07:21,404 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 20:07:21,405 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:07:21,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 20:07:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 20:07:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 20:07:21,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 20:07:21,408 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 20:07:21,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:21,408 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 20:07:21,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:07:21,408 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 20:07:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:07:21,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:21,408 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 20:07:21,409 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:21,409 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:21,409 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-09-30 20:07:21,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:21,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:21,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:21,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:21,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:21,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:21,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:21,973 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:07:22,003 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:07:22,003 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:22,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:22,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:22,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:07:22,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:07:22,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:07:22,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:07:22,034 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 20:07:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:22,097 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:07:22,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:07:22,098 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 20:07:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:22,098 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:07:22,099 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:07:22,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:07:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:07:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:07:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:07:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:07:22,102 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 20:07:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:22,102 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:07:22,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:07:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:07:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:07:22,103 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:22,103 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 20:07:22,103 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:22,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:22,104 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-09-30 20:07:22,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:22,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:22,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:22,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:22,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:22,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:22,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:22,764 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:07:22,804 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:07:22,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:22,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:22,817 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:22,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:22,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:07:22,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:07:22,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:07:22,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:07:22,838 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 20:07:22,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:22,912 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 20:07:22,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:07:22,912 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 20:07:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:22,913 INFO L225 Difference]: With dead ends: 42 [2018-09-30 20:07:22,913 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 20:07:22,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:07:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 20:07:22,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 20:07:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:07:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 20:07:22,916 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 20:07:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:22,916 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 20:07:22,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:07:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 20:07:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 20:07:22,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:22,917 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 20:07:22,917 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:22,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:22,918 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-09-30 20:07:22,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:22,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:22,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:22,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:22,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:24,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:24,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:24,137 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:07:24,183 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:07:24,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:24,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:24,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:24,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:07:24,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:07:24,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:07:24,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:07:24,229 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 20:07:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:24,864 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:07:24,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:07:24,865 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 20:07:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:24,865 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:07:24,865 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:07:24,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:07:24,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:07:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:07:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:07:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 20:07:24,870 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 20:07:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:24,870 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 20:07:24,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:07:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 20:07:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:07:24,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:24,871 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 20:07:24,872 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:24,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:24,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-09-30 20:07:24,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:24,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:24,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:24,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:24,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:26,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:26,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:26,184 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:26,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:26,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:26,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:07:26,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:07:26,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:07:26,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:07:26,243 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 20:07:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:26,308 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 20:07:26,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:07:26,308 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 20:07:26,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:26,309 INFO L225 Difference]: With dead ends: 44 [2018-09-30 20:07:26,309 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 20:07:26,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:07:26,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 20:07:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 20:07:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 20:07:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 20:07:26,313 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 20:07:26,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:26,313 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 20:07:26,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:07:26,313 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 20:07:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 20:07:26,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:26,314 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 20:07:26,314 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:26,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:26,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-09-30 20:07:26,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:26,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:26,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:26,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:26,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:27,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:27,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:27,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:27,085 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:27,085 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:27,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:27,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:27,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:07:27,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:07:27,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:07:27,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:07:27,131 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 20:07:27,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:27,342 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:07:27,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:07:27,342 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 20:07:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:27,343 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:07:27,343 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:07:27,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:07:27,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:07:27,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:07:27,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:07:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:07:27,347 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 20:07:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:27,347 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:07:27,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:07:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:07:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:07:27,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:27,348 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 20:07:27,348 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:27,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:27,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-09-30 20:07:27,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:27,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:27,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:27,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:27,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:28,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:28,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:28,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:07:28,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 20:07:28,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:28,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:28,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:28,133 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:07:28,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:07:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:07:28,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:07:28,134 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 20:07:28,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:28,203 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 20:07:28,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:07:28,204 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 20:07:28,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:28,204 INFO L225 Difference]: With dead ends: 46 [2018-09-30 20:07:28,204 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:07:28,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:07:28,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:07:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 20:07:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 20:07:28,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 20:07:28,207 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 20:07:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:28,207 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 20:07:28,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:07:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 20:07:28,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:07:28,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:28,207 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 20:07:28,208 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:28,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:28,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-09-30 20:07:28,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:28,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:28,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:28,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:28,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:28,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:29,488 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:29,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:29,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:29,496 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:07:29,551 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:07:29,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:29,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:29,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:29,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:07:29,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:07:29,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:07:29,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:07:29,598 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 20:07:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:29,749 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:07:29,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:07:29,749 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 20:07:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:29,750 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:07:29,750 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:07:29,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:07:29,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:07:29,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:07:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:07:29,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 20:07:29,753 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 20:07:29,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:29,754 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 20:07:29,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:07:29,754 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 20:07:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:07:29,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:29,754 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 20:07:29,754 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:29,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:29,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-09-30 20:07:29,755 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:29,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:29,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:29,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:29,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:29,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:30,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:30,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:30,689 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:07:30,732 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 20:07:30,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:30,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:30,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:30,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:07:30,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:07:30,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:07:30,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:07:30,767 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 20:07:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:30,817 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 20:07:30,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:07:30,817 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 20:07:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:30,818 INFO L225 Difference]: With dead ends: 48 [2018-09-30 20:07:30,818 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:07:30,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:07:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:07:30,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:07:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:07:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 20:07:30,822 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 20:07:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:30,822 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 20:07:30,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:07:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 20:07:30,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 20:07:30,822 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:30,822 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 20:07:30,823 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:30,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:30,823 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-09-30 20:07:30,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:30,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:30,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:30,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:30,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:32,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:32,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:32,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:07:32,615 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 20:07:32,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:32,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:32,649 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:32,649 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:07:32,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:07:32,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:07:32,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:07:32,651 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 20:07:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:32,726 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:07:32,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:07:32,726 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 20:07:32,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:32,727 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:07:32,727 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:07:32,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:07:32,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:07:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:07:32,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:07:32,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:07:32,730 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 20:07:32,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:32,730 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:07:32,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:07:32,730 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:07:32,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:07:32,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:32,731 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 20:07:32,731 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:32,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:32,732 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-09-30 20:07:32,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:32,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:32,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:32,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:32,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:34,098 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:34,098 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:34,098 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:34,105 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:34,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:34,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:34,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:07:34,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:07:34,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:07:34,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:07:34,174 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 20:07:34,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:34,338 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 20:07:34,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:07:34,339 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 20:07:34,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:34,339 INFO L225 Difference]: With dead ends: 50 [2018-09-30 20:07:34,340 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 20:07:34,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:07:34,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 20:07:34,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 20:07:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 20:07:34,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 20:07:34,343 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 20:07:34,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:34,343 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 20:07:34,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:07:34,343 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 20:07:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:07:34,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:34,344 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 20:07:34,344 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:34,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:34,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-09-30 20:07:34,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:34,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:34,345 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:34,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:34,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:35,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:35,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:35,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:35,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:35,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:35,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:35,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:35,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:07:35,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:07:35,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:07:35,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:07:35,365 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 20:07:35,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:35,452 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:07:35,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:07:35,452 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 20:07:35,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:35,453 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:07:35,453 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:07:35,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:07:35,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:07:35,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:07:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:07:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 20:07:35,456 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 20:07:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:35,456 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 20:07:35,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:07:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 20:07:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:07:35,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:35,457 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 20:07:35,457 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:35,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:35,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-09-30 20:07:35,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:35,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:35,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:35,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:35,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:36,344 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:36,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:36,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:07:36,400 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 20:07:36,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:36,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:36,445 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:36,445 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:07:36,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:07:36,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:07:36,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:07:36,446 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 20:07:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:36,920 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 20:07:36,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:07:36,921 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 20:07:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:36,921 INFO L225 Difference]: With dead ends: 52 [2018-09-30 20:07:36,922 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 20:07:36,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:07:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 20:07:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 20:07:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:07:36,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 20:07:36,925 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 20:07:36,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:36,925 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 20:07:36,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:07:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 20:07:36,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 20:07:36,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:36,926 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 20:07:36,926 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:36,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:36,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-09-30 20:07:36,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:36,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:36,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:36,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:36,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:37,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:37,949 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:37,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:37,956 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:07:37,995 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:07:37,995 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:37,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:38,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:38,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:07:38,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:07:38,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:07:38,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:07:38,032 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 20:07:38,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:38,102 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:07:38,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:07:38,103 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 20:07:38,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:38,104 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:07:38,104 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:07:38,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:07:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:07:38,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:07:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:07:38,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:07:38,107 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 20:07:38,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:38,107 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:07:38,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:07:38,107 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:07:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:07:38,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:38,107 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 20:07:38,108 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:38,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:38,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-09-30 20:07:38,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:38,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:38,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:38,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:38,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:38,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:38,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:38,963 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:07:39,015 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 20:07:39,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:39,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:39,053 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:39,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:07:39,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:07:39,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:07:39,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:07:39,054 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 20:07:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:39,239 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 20:07:39,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:07:39,239 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 20:07:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:39,240 INFO L225 Difference]: With dead ends: 54 [2018-09-30 20:07:39,240 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 20:07:39,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:07:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 20:07:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 20:07:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 20:07:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 20:07:39,243 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 20:07:39,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:39,243 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 20:07:39,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:07:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 20:07:39,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 20:07:39,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:39,244 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 20:07:39,245 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:39,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:39,245 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-09-30 20:07:39,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:39,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:39,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:39,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:39,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:40,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:40,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:40,526 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:07:40,577 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:07:40,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:40,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:40,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:40,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:07:40,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:07:40,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:07:40,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:07:40,610 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 20:07:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:40,698 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:07:40,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:07:40,699 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 20:07:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:40,700 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:07:40,700 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:07:40,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:07:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:07:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:07:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:07:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 20:07:40,704 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 20:07:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:40,704 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 20:07:40,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:07:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 20:07:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:07:40,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:40,705 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 20:07:40,705 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:40,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:40,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-09-30 20:07:40,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:40,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:40,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:40,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:40,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:41,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:41,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:41,715 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:41,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:41,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:41,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:07:41,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:07:41,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:07:41,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:07:41,808 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 20:07:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:41,917 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 20:07:41,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:07:41,917 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 20:07:41,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:41,918 INFO L225 Difference]: With dead ends: 56 [2018-09-30 20:07:41,918 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 20:07:41,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:07:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 20:07:41,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 20:07:41,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 20:07:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 20:07:41,920 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 20:07:41,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:41,921 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 20:07:41,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:07:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 20:07:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:07:41,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:41,921 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 20:07:41,922 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:41,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:41,922 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-09-30 20:07:41,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:41,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:41,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:41,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:41,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:42,953 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:42,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:42,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:43,022 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:43,023 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:43,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:43,071 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:43,071 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:07:43,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:07:43,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:07:43,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:07:43,073 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-30 20:07:43,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:43,259 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:07:43,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:07:43,260 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-30 20:07:43,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:43,261 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:07:43,261 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:07:43,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:07:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:07:43,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:07:43,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:07:43,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 20:07:43,264 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 20:07:43,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:43,265 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 20:07:43,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:07:43,265 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 20:07:43,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:07:43,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:43,265 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 20:07:43,266 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:43,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:43,266 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-09-30 20:07:43,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:43,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:43,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:43,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:43,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:44,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:44,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:44,635 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:07:44,689 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 20:07:44,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:44,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:44,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:44,734 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:44,734 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:07:44,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:07:44,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:07:44,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:07:44,735 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-30 20:07:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:45,033 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 20:07:45,034 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:07:45,034 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 20:07:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:45,035 INFO L225 Difference]: With dead ends: 58 [2018-09-30 20:07:45,035 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:07:45,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:07:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:07:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 20:07:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:07:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 20:07:45,038 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 20:07:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:45,039 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 20:07:45,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:07:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 20:07:45,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 20:07:45,039 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:45,039 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 20:07:45,040 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:45,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:45,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-09-30 20:07:45,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:45,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:45,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:45,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:45,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:46,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:46,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:46,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:46,268 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:07:46,312 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:07:46,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:46,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:46,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:46,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:07:46,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:07:46,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:07:46,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:07:46,351 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-30 20:07:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:46,442 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:07:46,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:07:46,442 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-30 20:07:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:46,443 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:07:46,443 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:07:46,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:07:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:07:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 20:07:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:07:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 20:07:46,448 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 20:07:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:46,448 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 20:07:46,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:07:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 20:07:46,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:07:46,449 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:46,449 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 20:07:46,449 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:46,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-09-30 20:07:46,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:46,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:46,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:46,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:46,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:47,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:47,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:47,680 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:07:47,737 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 20:07:47,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:47,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:47,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:47,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:07:47,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:07:47,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:07:47,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:07:47,784 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-30 20:07:47,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:47,885 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 20:07:47,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:07:47,886 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-30 20:07:47,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:47,887 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:07:47,887 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 20:07:47,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:07:47,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 20:07:47,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 20:07:47,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 20:07:47,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 20:07:47,890 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 20:07:47,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:47,890 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 20:07:47,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:07:47,890 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 20:07:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 20:07:47,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:47,891 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 20:07:47,891 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:47,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:47,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-09-30 20:07:47,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:47,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:47,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:47,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:47,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:49,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:49,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:49,141 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:07:49,194 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 20:07:49,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:49,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:49,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:49,227 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:49,227 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 20:07:49,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:07:49,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:07:49,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:07:49,229 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-30 20:07:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:49,480 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:07:49,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:07:49,480 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-30 20:07:49,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:49,481 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:07:49,481 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:07:49,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 20:07:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:07:49,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:07:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:07:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 20:07:49,484 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 20:07:49,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:49,484 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 20:07:49,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:07:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 20:07:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:07:49,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:49,485 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 20:07:49,485 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:49,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:49,486 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-09-30 20:07:49,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:49,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:49,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:49,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:49,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:50,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:50,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:50,738 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:50,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:50,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:50,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:07:50,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:07:50,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:07:50,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:07:50,824 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-30 20:07:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:50,933 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 20:07:50,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:07:50,934 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 20:07:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:50,935 INFO L225 Difference]: With dead ends: 62 [2018-09-30 20:07:50,935 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 20:07:50,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:07:50,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 20:07:50,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 20:07:50,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 20:07:50,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 20:07:50,937 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 20:07:50,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:50,938 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 20:07:50,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:07:50,938 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 20:07:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 20:07:50,938 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:50,939 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 20:07:50,939 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:50,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:50,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-09-30 20:07:50,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:50,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:50,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:50,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:07:50,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:52,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:52,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:52,143 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:07:52,190 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:07:52,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:52,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:52,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:52,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:07:52,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:07:52,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:07:52,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:07:52,225 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-30 20:07:52,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:52,329 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:07:52,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:07:52,330 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-30 20:07:52,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:52,330 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:07:52,330 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:07:52,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:07:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:07:52,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:07:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:07:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 20:07:52,334 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 20:07:52,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:52,334 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 20:07:52,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:07:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 20:07:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:07:52,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:52,335 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 20:07:52,335 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:52,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-09-30 20:07:52,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:52,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:52,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:52,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:52,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:53,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:53,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:53,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:07:53,641 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 20:07:53,642 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:53,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:53,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:53,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 20:07:53,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:07:53,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:07:53,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:07:53,690 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-30 20:07:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:54,076 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 20:07:54,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:07:54,077 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-30 20:07:54,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:54,078 INFO L225 Difference]: With dead ends: 64 [2018-09-30 20:07:54,078 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 20:07:54,078 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:07:54,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 20:07:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 20:07:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 20:07:54,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 20:07:54,082 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 20:07:54,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:54,082 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 20:07:54,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:07:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 20:07:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 20:07:54,082 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:54,082 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 20:07:54,083 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:54,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:54,083 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-09-30 20:07:54,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:54,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:54,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:54,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:54,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:56,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:56,235 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:56,244 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:07:56,290 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:07:56,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:56,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:56,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:56,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 20:07:56,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:07:56,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:07:56,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:07:56,328 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-30 20:07:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:56,446 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:07:56,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:07:56,446 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-30 20:07:56,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:56,447 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:07:56,447 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:07:56,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 20:07:56,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:07:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:07:56,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:07:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 20:07:56,450 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 20:07:56,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:56,450 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 20:07:56,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:07:56,450 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 20:07:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:07:56,450 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:56,450 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 20:07:56,451 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:56,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:56,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-09-30 20:07:56,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:56,451 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:56,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:56,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:56,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:07:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:57,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:07:57,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:07:57,850 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:07:57,909 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 20:07:57,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:07:57,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:07:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:07:57,956 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:07:57,956 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 20:07:57,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:07:57,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:07:57,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:07:57,957 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-30 20:07:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:07:58,149 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 20:07:58,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:07:58,149 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 20:07:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:07:58,150 INFO L225 Difference]: With dead ends: 66 [2018-09-30 20:07:58,150 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 20:07:58,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:07:58,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 20:07:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 20:07:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 20:07:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 20:07:58,156 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 20:07:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:07:58,156 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 20:07:58,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:07:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 20:07:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 20:07:58,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:07:58,157 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 20:07:58,157 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:07:58,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:07:58,157 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-09-30 20:07:58,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:07:58,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:07:58,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:58,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:07:58,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:07:58,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:00,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:00,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:00,056 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:08:00,117 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:08:00,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:00,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:00,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:00,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 20:08:00,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:08:00,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:08:00,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:08:00,167 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-30 20:08:00,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:00,292 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 20:08:00,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:08:00,292 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-30 20:08:00,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:00,293 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:08:00,293 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 20:08:00,294 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 20:08:00,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 20:08:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 20:08:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:08:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 20:08:00,296 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 20:08:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:00,296 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 20:08:00,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:08:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 20:08:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:08:00,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:00,297 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 20:08:00,297 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:00,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-09-30 20:08:00,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:00,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:00,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:00,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:00,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:01,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:01,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:01,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:01,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:01,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:01,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 20:08:01,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:08:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:08:01,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:08:01,787 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-30 20:08:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:01,874 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 20:08:01,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:08:01,875 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-30 20:08:01,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:01,875 INFO L225 Difference]: With dead ends: 68 [2018-09-30 20:08:01,876 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:08:01,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:08:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:08:01,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 20:08:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:08:01,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 20:08:01,878 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 20:08:01,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:01,878 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 20:08:01,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:08:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 20:08:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 20:08:01,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:01,879 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 20:08:01,879 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:01,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:01,879 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-09-30 20:08:01,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:01,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:01,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:01,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:01,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:05,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:05,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:05,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:08:05,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:08:05,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:05,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:05,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:05,271 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:05,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 20:08:05,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:08:05,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:08:05,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:08:05,273 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-30 20:08:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:05,430 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:08:05,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:08:05,431 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-30 20:08:05,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:05,432 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:08:05,432 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:08:05,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:08:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:08:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:08:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:08:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 20:08:05,436 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 20:08:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:05,436 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 20:08:05,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:08:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 20:08:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:08:05,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:05,437 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 20:08:05,437 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:05,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:05,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-09-30 20:08:05,438 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:05,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:05,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:05,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:05,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:07,608 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:07,608 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:07,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:08:07,689 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 20:08:07,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:07,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:07,726 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:07,727 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 20:08:07,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:08:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:08:07,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:08:07,728 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-30 20:08:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:07,836 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 20:08:07,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:08:07,844 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 20:08:07,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:07,844 INFO L225 Difference]: With dead ends: 70 [2018-09-30 20:08:07,845 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 20:08:07,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:08:07,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 20:08:07,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 20:08:07,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 20:08:07,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 20:08:07,847 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 20:08:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:07,850 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 20:08:07,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:08:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 20:08:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 20:08:07,850 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:07,851 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 20:08:07,851 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:07,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:07,851 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-09-30 20:08:07,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:07,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:07,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:07,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:07,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:09,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:09,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:09,403 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:08:09,456 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:08:09,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:09,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:09,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:09,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 20:08:09,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:08:09,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:08:09,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:08:09,502 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-30 20:08:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:09,678 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 20:08:09,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:08:09,679 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-30 20:08:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:09,680 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:08:09,680 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:08:09,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 20:08:09,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:08:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 20:08:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 20:08:09,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 20:08:09,682 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 20:08:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:09,683 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 20:08:09,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:08:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 20:08:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:08:09,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:09,683 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 20:08:09,683 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:09,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:09,684 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-09-30 20:08:09,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:09,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:09,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:09,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:09,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:11,563 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:11,563 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:11,571 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:08:11,638 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 20:08:11,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:11,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:11,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:11,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 20:08:11,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:08:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:08:11,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:08:11,691 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-30 20:08:12,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:12,015 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 20:08:12,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:08:12,015 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-30 20:08:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:12,015 INFO L225 Difference]: With dead ends: 72 [2018-09-30 20:08:12,015 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 20:08:12,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:08:12,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 20:08:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 20:08:12,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:08:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 20:08:12,018 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 20:08:12,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:12,019 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 20:08:12,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:08:12,019 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 20:08:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 20:08:12,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:12,019 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 20:08:12,019 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:12,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:12,020 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-09-30 20:08:12,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:12,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:12,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:12,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:12,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:13,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:13,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:13,648 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:08:13,713 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 20:08:13,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:13,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:13,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:13,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 20:08:13,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:08:13,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:08:13,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:08:13,770 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-30 20:08:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:14,055 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:08:14,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:08:14,056 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-30 20:08:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:14,056 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:08:14,057 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:08:14,057 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 20:08:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:08:14,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:08:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:08:14,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 20:08:14,060 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 20:08:14,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:14,060 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 20:08:14,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:08:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 20:08:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:08:14,061 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:14,061 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 20:08:14,061 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:14,061 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:14,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-09-30 20:08:14,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:14,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:14,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:14,062 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:14,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:15,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:15,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:15,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:16,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:16,041 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:16,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 20:08:16,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:08:16,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:08:16,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:08:16,043 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-30 20:08:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:16,171 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 20:08:16,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:08:16,172 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 20:08:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:16,172 INFO L225 Difference]: With dead ends: 74 [2018-09-30 20:08:16,173 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 20:08:16,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:08:16,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 20:08:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 20:08:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 20:08:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 20:08:16,175 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 20:08:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:16,175 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 20:08:16,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:08:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 20:08:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 20:08:16,175 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:16,176 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 20:08:16,176 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:16,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:16,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-09-30 20:08:16,176 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:16,176 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:16,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:16,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:16,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:18,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:18,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:18,040 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:08:18,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:08:18,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:18,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:18,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:18,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 20:08:18,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:08:18,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:08:18,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:08:18,131 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-30 20:08:18,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:18,302 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 20:08:18,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:08:18,303 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-30 20:08:18,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:18,303 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:08:18,303 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 20:08:18,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:08:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 20:08:18,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 20:08:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:08:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 20:08:18,306 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 20:08:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:18,307 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 20:08:18,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:08:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 20:08:18,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:08:18,307 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:18,307 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 20:08:18,308 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:18,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:18,308 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-09-30 20:08:18,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:18,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:18,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:18,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:18,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:20,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:20,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:20,454 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:08:20,531 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 20:08:20,531 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:20,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:20,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:20,584 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 20:08:20,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:08:20,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:08:20,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:08:20,585 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-30 20:08:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:21,961 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 20:08:21,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:08:21,961 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-30 20:08:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:21,962 INFO L225 Difference]: With dead ends: 76 [2018-09-30 20:08:21,962 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:08:21,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:08:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:08:21,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 20:08:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 20:08:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 20:08:21,965 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 20:08:21,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:21,966 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 20:08:21,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:08:21,966 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 20:08:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 20:08:21,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:21,967 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-30 20:08:21,967 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:21,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:21,967 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-09-30 20:08:21,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:21,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:21,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:21,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:21,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:24,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:24,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:24,061 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:08:24,127 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:08:24,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:24,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:24,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:24,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 20:08:24,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:08:24,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:08:24,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:08:24,176 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-30 20:08:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:24,400 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:08:24,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:08:24,401 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-30 20:08:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:24,402 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:08:24,402 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:08:24,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 20:08:24,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:08:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:08:24,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:08:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 20:08:24,404 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 20:08:24,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:24,405 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 20:08:24,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:08:24,405 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 20:08:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:08:24,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:24,406 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 20:08:24,406 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:24,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:24,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-09-30 20:08:24,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:24,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:24,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:24,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:24,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:26,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:26,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:26,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:26,600 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:08:26,679 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 20:08:26,679 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:26,682 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:26,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:26,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 20:08:26,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:08:26,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:08:26,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:08:26,732 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-30 20:08:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:26,874 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 20:08:26,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:08:26,874 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-30 20:08:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:26,875 INFO L225 Difference]: With dead ends: 78 [2018-09-30 20:08:26,875 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 20:08:26,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:08:26,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 20:08:26,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 20:08:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:08:26,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 20:08:26,878 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 20:08:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:26,878 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 20:08:26,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:08:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 20:08:26,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 20:08:26,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:26,879 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-30 20:08:26,879 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:26,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:26,880 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-09-30 20:08:26,880 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:26,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:26,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:26,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:26,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:28,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:28,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:28,915 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:08:28,985 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:08:28,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:28,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:29,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:29,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 20:08:29,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:08:29,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:08:29,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:08:29,038 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-30 20:08:29,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:29,191 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 20:08:29,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:08:29,191 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-30 20:08:29,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:29,192 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:08:29,192 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:08:29,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 20:08:29,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:08:29,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:08:29,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:08:29,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 20:08:29,196 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 20:08:29,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:29,196 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 20:08:29,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:08:29,196 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 20:08:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:08:29,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:29,197 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 20:08:29,197 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:29,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1560746476, now seen corresponding path program 73 times [2018-09-30 20:08:29,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:29,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:29,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:29,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:29,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:31,559 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:31,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:31,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:31,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:31,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:31,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 20:08:31,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:08:31,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:08:31,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:08:31,666 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-30 20:08:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:31,819 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 20:08:31,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:08:31,819 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-30 20:08:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:31,820 INFO L225 Difference]: With dead ends: 80 [2018-09-30 20:08:31,820 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 20:08:31,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:08:31,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 20:08:31,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 20:08:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 20:08:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 20:08:31,822 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 20:08:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:31,822 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 20:08:31,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:08:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 20:08:31,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 20:08:31,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:31,823 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-30 20:08:31,823 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:31,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:31,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1138502307, now seen corresponding path program 74 times [2018-09-30 20:08:31,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:31,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:31,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:31,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:31,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:31,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:33,851 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:33,851 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:33,859 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:08:33,916 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:08:33,916 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:33,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:33,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:33,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 20:08:33,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:08:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:08:33,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:08:33,959 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-30 20:08:34,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:34,123 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:08:34,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:08:34,123 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-30 20:08:34,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:34,124 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:08:34,124 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:08:34,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:08:34,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:08:34,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:08:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:08:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 20:08:34,126 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 20:08:34,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:34,126 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 20:08:34,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:08:34,126 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 20:08:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:08:34,126 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:34,127 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 20:08:34,127 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:34,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:34,127 INFO L82 PathProgramCache]: Analyzing trace with hash 933834956, now seen corresponding path program 75 times [2018-09-30 20:08:34,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:34,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:34,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:34,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:34,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:36,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:36,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:36,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:08:36,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 20:08:36,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:36,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:36,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:36,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 20:08:36,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:08:36,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:08:36,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:08:36,625 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-30 20:08:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:36,785 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 20:08:36,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:08:36,785 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-30 20:08:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:36,786 INFO L225 Difference]: With dead ends: 82 [2018-09-30 20:08:36,786 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 20:08:36,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:08:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 20:08:36,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 20:08:36,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:08:36,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 20:08:36,789 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 20:08:36,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:36,789 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 20:08:36,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:08:36,789 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 20:08:36,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 20:08:36,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:36,790 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-30 20:08:36,790 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:36,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:36,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1115885629, now seen corresponding path program 76 times [2018-09-30 20:08:36,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:36,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:36,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:36,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:36,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:38,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:38,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:38,920 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:08:38,985 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:08:38,985 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:38,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:39,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:39,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:39,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 20:08:39,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 20:08:39,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 20:08:39,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:08:39,023 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-30 20:08:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:40,140 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 20:08:40,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:08:40,141 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-30 20:08:40,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:40,141 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:08:40,141 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 20:08:40,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 20:08:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 20:08:40,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 20:08:40,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 20:08:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 20:08:40,145 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 20:08:40,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:40,145 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 20:08:40,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 20:08:40,145 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 20:08:40,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:08:40,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:40,146 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 20:08:40,146 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:40,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:40,146 INFO L82 PathProgramCache]: Analyzing trace with hash -232714324, now seen corresponding path program 77 times [2018-09-30 20:08:40,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:40,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:40,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:40,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:40,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:42,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:42,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:42,880 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:08:42,962 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 20:08:42,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:42,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:43,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:43,016 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 20:08:43,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:08:43,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:08:43,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:08:43,017 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-30 20:08:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:43,189 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 20:08:43,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:08:43,190 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-30 20:08:43,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:43,191 INFO L225 Difference]: With dead ends: 84 [2018-09-30 20:08:43,191 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 20:08:43,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:08:43,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 20:08:43,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 20:08:43,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 20:08:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 20:08:43,193 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 20:08:43,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:43,193 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 20:08:43,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:08:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 20:08:43,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 20:08:43,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:43,194 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-30 20:08:43,194 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:43,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:43,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1375792355, now seen corresponding path program 78 times [2018-09-30 20:08:43,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:43,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:43,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:43,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:43,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:46,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:46,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:46,226 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:08:46,477 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 20:08:46,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:46,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:46,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:46,533 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 20:08:46,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 20:08:46,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 20:08:46,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 20:08:46,535 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-30 20:08:46,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:46,742 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:08:46,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:08:46,742 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-30 20:08:46,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:46,743 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:08:46,743 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:08:46,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 20:08:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:08:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:08:46,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:08:46,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 20:08:46,745 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 20:08:46,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:46,745 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 20:08:46,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 20:08:46,746 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 20:08:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:08:46,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:46,747 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-30 20:08:46,747 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:46,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:46,748 INFO L82 PathProgramCache]: Analyzing trace with hash -300108148, now seen corresponding path program 79 times [2018-09-30 20:08:46,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:46,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:46,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:46,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:46,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:49,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:49,106 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:49,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:49,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:49,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:49,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 20:08:49,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:08:49,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:08:49,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:08:49,214 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-30 20:08:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:49,384 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 20:08:49,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:08:49,385 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-30 20:08:49,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:49,385 INFO L225 Difference]: With dead ends: 86 [2018-09-30 20:08:49,386 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 20:08:49,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:08:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 20:08:49,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 20:08:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 20:08:49,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 20:08:49,388 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 20:08:49,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:49,388 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 20:08:49,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:08:49,388 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 20:08:49,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:08:49,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:49,389 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-30 20:08:49,389 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:49,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:49,389 INFO L82 PathProgramCache]: Analyzing trace with hash -713416189, now seen corresponding path program 80 times [2018-09-30 20:08:49,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:49,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:49,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:49,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:08:49,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:52,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:52,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:52,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:08:52,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:08:52,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:52,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:52,177 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:52,177 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 20:08:52,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:08:52,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:08:52,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:08:52,178 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-30 20:08:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:52,376 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 20:08:52,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:08:52,377 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-30 20:08:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:52,377 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:08:52,377 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:08:52,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:08:52,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:08:52,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:08:52,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:08:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 20:08:52,379 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 20:08:52,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:52,380 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 20:08:52,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:08:52,380 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 20:08:52,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:08:52,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:52,380 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-30 20:08:52,380 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:52,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:52,381 INFO L82 PathProgramCache]: Analyzing trace with hash -641063572, now seen corresponding path program 81 times [2018-09-30 20:08:52,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:52,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:52,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:52,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:52,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:55,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:55,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:55,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:08:55,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 20:08:55,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:55,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:55,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:55,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 20:08:55,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:08:55,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:08:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:08:55,332 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-30 20:08:56,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:56,941 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 20:08:56,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 20:08:56,942 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-30 20:08:56,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:56,942 INFO L225 Difference]: With dead ends: 88 [2018-09-30 20:08:56,942 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:08:56,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:08:56,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:08:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 20:08:56,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:08:56,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 20:08:56,947 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 20:08:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:56,947 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 20:08:56,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:08:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 20:08:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 20:08:56,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:56,948 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-30 20:08:56,948 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:56,948 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:56,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1601867555, now seen corresponding path program 82 times [2018-09-30 20:08:56,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:56,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:56,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:56,949 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:56,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:08:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:59,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:08:59,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:08:59,473 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:08:59,534 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:08:59,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:08:59,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:08:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:08:59,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:08:59,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 20:08:59,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 20:08:59,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 20:08:59,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 20:08:59,590 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-30 20:08:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:08:59,725 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:08:59,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:08:59,726 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-30 20:08:59,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:08:59,726 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:08:59,727 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:08:59,727 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 20:08:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:08:59,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 20:08:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:08:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 20:08:59,729 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 20:08:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:08:59,729 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 20:08:59,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 20:08:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 20:08:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:08:59,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:08:59,730 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-30 20:08:59,730 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:08:59,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:08:59,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1881711540, now seen corresponding path program 83 times [2018-09-30 20:08:59,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:08:59,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:08:59,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:59,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:08:59,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:08:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:02,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:02,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:02,542 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:09:02,638 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 20:09:02,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:02,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:02,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:02,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:02,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 20:09:02,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:09:02,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:09:02,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:09:02,679 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-30 20:09:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:03,032 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 20:09:03,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:09:03,032 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-30 20:09:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:03,032 INFO L225 Difference]: With dead ends: 90 [2018-09-30 20:09:03,032 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 20:09:03,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:09:03,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 20:09:03,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 20:09:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 20:09:03,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 20:09:03,035 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 20:09:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:03,035 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 20:09:03,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:09:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 20:09:03,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 20:09:03,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:03,036 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-30 20:09:03,036 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:03,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:03,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1796486211, now seen corresponding path program 84 times [2018-09-30 20:09:03,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:03,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:03,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:03,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:03,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:03,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:05,542 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:05,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:05,549 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:09:05,639 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:09:05,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:05,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:05,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:05,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 20:09:05,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 20:09:05,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 20:09:05,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:09:05,680 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-30 20:09:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:05,876 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 20:09:05,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:09:05,877 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-30 20:09:05,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:05,877 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:09:05,877 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:09:05,878 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 20:09:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:09:05,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 20:09:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 20:09:05,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 20:09:05,880 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 20:09:05,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:05,880 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 20:09:05,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 20:09:05,880 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 20:09:05,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:09:05,881 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:05,882 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-30 20:09:05,882 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:05,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:05,882 INFO L82 PathProgramCache]: Analyzing trace with hash -143500500, now seen corresponding path program 85 times [2018-09-30 20:09:05,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:05,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:05,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:05,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:05,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:08,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:08,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:08,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:08,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:08,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:09,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:09,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 20:09:09,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:09:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:09:09,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 20:09:09,013 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-30 20:09:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:09,168 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 20:09:09,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 20:09:09,168 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-30 20:09:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:09,169 INFO L225 Difference]: With dead ends: 92 [2018-09-30 20:09:09,169 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 20:09:09,170 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 20:09:09,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 20:09:09,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 20:09:09,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 20:09:09,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 20:09:09,172 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 20:09:09,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:09,172 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 20:09:09,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:09:09,172 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 20:09:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 20:09:09,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:09,173 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-30 20:09:09,173 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:09,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:09,173 INFO L82 PathProgramCache]: Analyzing trace with hash -153546397, now seen corresponding path program 86 times [2018-09-30 20:09:09,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:09,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:09,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:09,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:09,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:09,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:12,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:12,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:12,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:09:12,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:09:12,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:12,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:12,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:12,180 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 20:09:12,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 20:09:12,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 20:09:12,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 20:09:12,182 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-30 20:09:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:12,388 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:09:12,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:09:12,388 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-30 20:09:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:12,389 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:09:12,389 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:09:12,389 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 20:09:12,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:09:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:09:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:09:12,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 20:09:12,391 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 20:09:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:12,391 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 20:09:12,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 20:09:12,391 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 20:09:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:09:12,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:12,392 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-30 20:09:12,392 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:12,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:12,392 INFO L82 PathProgramCache]: Analyzing trace with hash -464969204, now seen corresponding path program 87 times [2018-09-30 20:09:12,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:12,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:12,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:12,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:12,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:15,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:15,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:15,140 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:09:15,234 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 20:09:15,235 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:15,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:15,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:15,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 20:09:15,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:09:15,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:09:15,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:09:15,288 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-30 20:09:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:15,494 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 20:09:15,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:09:15,494 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-30 20:09:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:15,495 INFO L225 Difference]: With dead ends: 94 [2018-09-30 20:09:15,495 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 20:09:15,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:09:15,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 20:09:15,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 20:09:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 20:09:15,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 20:09:15,498 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 20:09:15,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:15,498 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 20:09:15,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:09:15,498 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 20:09:15,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 20:09:15,498 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:15,499 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-30 20:09:15,499 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:15,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:15,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1529141629, now seen corresponding path program 88 times [2018-09-30 20:09:15,499 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:15,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:15,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:15,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:15,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:18,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:18,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:18,624 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:09:18,689 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:09:18,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:18,692 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:18,730 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:18,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 20:09:18,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 20:09:18,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 20:09:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 20:09:18,731 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-30 20:09:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:18,873 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 20:09:18,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:09:18,873 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-30 20:09:18,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:18,874 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:09:18,874 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:09:18,875 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 20:09:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:09:18,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 20:09:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 20:09:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 20:09:18,877 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 20:09:18,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:18,877 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 20:09:18,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 20:09:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 20:09:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:09:18,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:18,878 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-30 20:09:18,878 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:18,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:18,878 INFO L82 PathProgramCache]: Analyzing trace with hash -158748436, now seen corresponding path program 89 times [2018-09-30 20:09:18,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:18,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:18,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:18,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:18,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:21,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:21,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:21,992 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:09:22,098 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 20:09:22,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:22,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:22,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:22,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 20:09:22,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:09:22,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:09:22,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:09:22,139 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-30 20:09:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:22,375 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 20:09:22,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 20:09:22,375 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-30 20:09:22,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:22,376 INFO L225 Difference]: With dead ends: 96 [2018-09-30 20:09:22,376 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:09:22,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:09:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:09:22,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 20:09:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 20:09:22,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 20:09:22,378 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 20:09:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:22,379 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 20:09:22,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:09:22,379 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 20:09:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:09:22,379 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:22,379 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-30 20:09:22,380 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:22,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:22,380 INFO L82 PathProgramCache]: Analyzing trace with hash -626232413, now seen corresponding path program 90 times [2018-09-30 20:09:22,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:22,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:22,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:22,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:22,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:25,285 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:25,285 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:25,293 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:09:25,393 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 20:09:25,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:25,396 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:25,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:25,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 20:09:25,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 20:09:25,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 20:09:25,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 20:09:25,434 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-30 20:09:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:25,914 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:09:25,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:09:25,915 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-30 20:09:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:25,915 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:09:25,915 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:09:25,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 20:09:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:09:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 20:09:25,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:09:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 20:09:25,918 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 20:09:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:25,918 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 20:09:25,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 20:09:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 20:09:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 20:09:25,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:25,919 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-30 20:09:25,920 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:25,920 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:25,920 INFO L82 PathProgramCache]: Analyzing trace with hash 2061633484, now seen corresponding path program 91 times [2018-09-30 20:09:25,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:25,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:25,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:25,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:25,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:29,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:29,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:29,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:29,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:29,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:29,367 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:29,367 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 20:09:29,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:09:29,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:09:29,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:09:29,368 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-30 20:09:29,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:29,584 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 20:09:29,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:09:29,584 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-30 20:09:29,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:29,584 INFO L225 Difference]: With dead ends: 98 [2018-09-30 20:09:29,584 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:09:29,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:09:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:09:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 20:09:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 20:09:29,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 20:09:29,587 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 20:09:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:29,587 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 20:09:29,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:09:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 20:09:29,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 20:09:29,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:29,588 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-30 20:09:29,588 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:29,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:29,588 INFO L82 PathProgramCache]: Analyzing trace with hash -513869629, now seen corresponding path program 92 times [2018-09-30 20:09:29,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:29,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:29,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:29,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:29,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:33,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:33,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:33,370 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:09:33,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:09:33,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:33,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:33,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:33,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 20:09:33,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 20:09:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 20:09:33,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 20:09:33,481 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-30 20:09:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:33,681 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 20:09:33,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:09:33,682 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-30 20:09:33,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:33,682 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:09:33,682 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 20:09:33,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 20:09:33,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 20:09:33,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 20:09:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:09:33,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 20:09:33,686 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 20:09:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:33,686 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 20:09:33,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 20:09:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 20:09:33,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 20:09:33,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:33,687 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-30 20:09:33,687 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:33,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:33,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1249912492, now seen corresponding path program 93 times [2018-09-30 20:09:33,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:33,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:33,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:33,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:33,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:37,319 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:37,319 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:37,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:09:37,426 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 20:09:37,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:37,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:37,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:37,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 20:09:37,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:09:37,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:09:37,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 20:09:37,468 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-30 20:09:37,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:37,643 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 20:09:37,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:09:37,643 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-30 20:09:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:37,644 INFO L225 Difference]: With dead ends: 100 [2018-09-30 20:09:37,644 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 20:09:37,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 20:09:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 20:09:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 20:09:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 20:09:37,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 20:09:37,646 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 20:09:37,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:37,646 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 20:09:37,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:09:37,646 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 20:09:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 20:09:37,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:37,647 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-30 20:09:37,647 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:37,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:37,648 INFO L82 PathProgramCache]: Analyzing trace with hash 92583395, now seen corresponding path program 94 times [2018-09-30 20:09:37,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:37,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:37,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:37,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:37,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:40,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:40,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:40,855 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:09:40,928 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:09:40,928 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:40,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:40,985 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:40,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 20:09:40,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 20:09:40,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 20:09:40,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 20:09:40,987 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-30 20:09:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:41,247 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:09:41,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:09:41,247 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-30 20:09:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:41,248 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:09:41,248 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:09:41,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 20:09:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:09:41,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:09:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:09:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 20:09:41,251 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 20:09:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:41,251 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 20:09:41,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 20:09:41,252 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 20:09:41,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:09:41,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:41,253 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-30 20:09:41,253 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:41,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:41,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1424880244, now seen corresponding path program 95 times [2018-09-30 20:09:41,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:41,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:41,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:41,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:41,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:41,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:44,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:44,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:44,717 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:09:44,829 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 20:09:44,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:44,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:44,870 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:44,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 20:09:44,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 20:09:44,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 20:09:44,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:09:44,872 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-30 20:09:45,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:45,549 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 20:09:45,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 20:09:45,550 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-30 20:09:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:45,550 INFO L225 Difference]: With dead ends: 102 [2018-09-30 20:09:45,550 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 20:09:45,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:09:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 20:09:45,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 20:09:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:09:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 20:09:45,553 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 20:09:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:45,553 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 20:09:45,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 20:09:45,553 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 20:09:45,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 20:09:45,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:45,554 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-30 20:09:45,554 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:45,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:45,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1221612797, now seen corresponding path program 96 times [2018-09-30 20:09:45,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:45,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:45,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:45,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:45,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:49,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:49,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:49,106 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:09:49,210 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:09:49,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:49,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:49,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:49,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 20:09:49,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 20:09:49,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 20:09:49,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 20:09:49,252 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-30 20:09:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:49,521 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 20:09:49,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 20:09:49,521 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-30 20:09:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:49,522 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:09:49,522 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:09:49,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 20:09:49,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:09:49,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:09:49,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:09:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 20:09:49,524 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 20:09:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:49,524 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 20:09:49,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 20:09:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 20:09:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:09:49,525 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:49,525 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-30 20:09:49,525 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:49,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:49,526 INFO L82 PathProgramCache]: Analyzing trace with hash 784710764, now seen corresponding path program 97 times [2018-09-30 20:09:49,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:49,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:49,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:49,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:49,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:53,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:53,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:53,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:53,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:53,399 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:53,399 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 20:09:53,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 20:09:53,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 20:09:53,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 20:09:53,401 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-30 20:09:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:53,658 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 20:09:53,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 20:09:53,658 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-30 20:09:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:53,659 INFO L225 Difference]: With dead ends: 104 [2018-09-30 20:09:53,659 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 20:09:53,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 20:09:53,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 20:09:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 20:09:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 20:09:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 20:09:53,662 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 20:09:53,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:53,662 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 20:09:53,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 20:09:53,662 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 20:09:53,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 20:09:53,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:53,663 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-30 20:09:53,663 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:53,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:53,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1443768285, now seen corresponding path program 98 times [2018-09-30 20:09:53,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:53,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:53,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:53,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:09:53,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:09:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:57,068 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:09:57,068 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:09:57,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:09:57,152 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:09:57,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:09:57,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:09:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:09:57,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:09:57,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 20:09:57,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 20:09:57,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 20:09:57,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 20:09:57,194 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-30 20:09:57,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:09:57,460 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:09:57,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 20:09:57,460 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-30 20:09:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:09:57,461 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:09:57,461 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 20:09:57,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 20:09:57,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 20:09:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 20:09:57,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 20:09:57,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 20:09:57,464 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 20:09:57,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:09:57,464 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 20:09:57,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 20:09:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 20:09:57,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:09:57,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:09:57,465 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-30 20:09:57,465 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:09:57,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:09:57,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1807142068, now seen corresponding path program 99 times [2018-09-30 20:09:57,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:09:57,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:09:57,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:57,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:09:57,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:09:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:00,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:00,985 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:00,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:01,104 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 20:10:01,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:01,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:01,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:01,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 20:10:01,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:10:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:10:01,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:10:01,150 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-30 20:10:01,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:01,428 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-30 20:10:01,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 20:10:01,428 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-30 20:10:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:01,429 INFO L225 Difference]: With dead ends: 106 [2018-09-30 20:10:01,429 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:10:01,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:10:01,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:10:01,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 20:10:01,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 20:10:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 20:10:01,432 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 20:10:01,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:01,432 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 20:10:01,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:10:01,432 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 20:10:01,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 20:10:01,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:01,433 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-30 20:10:01,433 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:01,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:01,434 INFO L82 PathProgramCache]: Analyzing trace with hash -186827453, now seen corresponding path program 100 times [2018-09-30 20:10:01,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:01,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:01,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:01,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:01,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:05,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:05,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:05,394 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:05,475 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:05,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:05,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:05,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:05,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 20:10:05,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 20:10:05,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 20:10:05,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 20:10:05,520 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-30 20:10:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:05,716 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 20:10:05,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 20:10:05,716 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-30 20:10:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:05,717 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:10:05,717 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 20:10:05,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 20:10:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 20:10:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 20:10:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:10:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 20:10:05,722 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-30 20:10:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:05,722 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 20:10:05,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 20:10:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 20:10:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:10:05,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:05,723 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-30 20:10:05,723 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:05,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:05,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1496681940, now seen corresponding path program 101 times [2018-09-30 20:10:05,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:05,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:05,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:05,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:05,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:09,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:09,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:09,544 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:10:09,673 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 20:10:09,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:09,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:09,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:09,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 20:10:09,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 20:10:09,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 20:10:09,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 20:10:09,727 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-30 20:10:09,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:09,961 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-30 20:10:09,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 20:10:09,961 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-30 20:10:09,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:09,962 INFO L225 Difference]: With dead ends: 108 [2018-09-30 20:10:09,962 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:10:09,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 20:10:09,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:10:09,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 20:10:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:10:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 20:10:09,965 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-30 20:10:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:09,966 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 20:10:09,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 20:10:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 20:10:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 20:10:09,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:09,967 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-30 20:10:09,967 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:09,967 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:09,967 INFO L82 PathProgramCache]: Analyzing trace with hash 847501923, now seen corresponding path program 102 times [2018-09-30 20:10:09,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:09,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:09,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:09,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:09,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:14,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:14,081 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:14,091 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:10:14,207 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 20:10:14,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:14,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:14,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:14,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 20:10:14,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 20:10:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 20:10:14,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 20:10:14,252 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-30 20:10:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:14,548 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 20:10:14,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 20:10:14,548 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-30 20:10:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:14,549 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:10:14,549 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:10:14,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 20:10:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:10:14,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 20:10:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:10:14,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 20:10:14,552 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-30 20:10:14,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:14,552 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 20:10:14,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 20:10:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 20:10:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:10:14,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:14,553 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-30 20:10:14,553 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:14,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:14,553 INFO L82 PathProgramCache]: Analyzing trace with hash 502757644, now seen corresponding path program 103 times [2018-09-30 20:10:14,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:14,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:14,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:14,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:14,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:18,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:18,619 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:18,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:18,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:18,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:18,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 20:10:18,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:10:18,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:10:18,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:10:18,754 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-30 20:10:19,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:19,046 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-30 20:10:19,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 20:10:19,047 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-30 20:10:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:19,047 INFO L225 Difference]: With dead ends: 110 [2018-09-30 20:10:19,047 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 20:10:19,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:10:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 20:10:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 20:10:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 20:10:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 20:10:19,050 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-30 20:10:19,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:19,050 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 20:10:19,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:10:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 20:10:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:10:19,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:19,051 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-30 20:10:19,051 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:19,051 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1594380413, now seen corresponding path program 104 times [2018-09-30 20:10:19,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:19,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:19,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:19,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:19,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:23,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:23,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:23,089 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:23,171 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:23,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:23,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:23,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:23,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 20:10:23,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 20:10:23,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 20:10:23,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 20:10:23,234 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-30 20:10:23,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:23,542 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 20:10:23,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 20:10:23,542 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-30 20:10:23,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:23,543 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:10:23,543 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 20:10:23,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 20:10:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 20:10:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 20:10:23,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 20:10:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 20:10:23,547 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-30 20:10:23,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:23,547 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 20:10:23,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 20:10:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 20:10:23,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 20:10:23,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:23,547 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-30 20:10:23,548 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:23,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:23,548 INFO L82 PathProgramCache]: Analyzing trace with hash 2113816556, now seen corresponding path program 105 times [2018-09-30 20:10:23,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:23,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:23,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:23,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:23,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:27,477 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:27,477 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:27,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:27,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 20:10:27,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:27,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:27,662 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:27,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 20:10:27,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:10:27,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:10:27,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 20:10:27,664 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-30 20:10:28,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:28,012 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-30 20:10:28,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 20:10:28,012 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-30 20:10:28,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:28,012 INFO L225 Difference]: With dead ends: 112 [2018-09-30 20:10:28,012 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 20:10:28,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 20:10:28,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 20:10:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 20:10:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:10:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 20:10:28,015 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-30 20:10:28,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:28,015 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 20:10:28,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:10:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 20:10:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 20:10:28,015 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:28,016 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-30 20:10:28,016 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:28,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1103805603, now seen corresponding path program 106 times [2018-09-30 20:10:28,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:28,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:28,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:28,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:28,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:32,255 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:32,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:32,262 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:32,348 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:32,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:32,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:32,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:32,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:32,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 20:10:32,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 20:10:32,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 20:10:32,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 20:10:32,392 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-30 20:10:32,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:32,735 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 20:10:32,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 20:10:32,736 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-30 20:10:32,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:32,736 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:10:32,736 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 20:10:32,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 20:10:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 20:10:32,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 20:10:32,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 20:10:32,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 20:10:32,739 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-30 20:10:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:32,739 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 20:10:32,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 20:10:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 20:10:32,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:10:32,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:32,740 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-30 20:10:32,741 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:32,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:32,741 INFO L82 PathProgramCache]: Analyzing trace with hash -141762868, now seen corresponding path program 107 times [2018-09-30 20:10:32,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:32,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:32,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:32,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:32,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:37,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:37,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:37,155 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:10:37,287 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 20:10:37,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:37,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:37,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:37,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 20:10:37,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 20:10:37,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 20:10:37,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 20:10:37,337 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-30 20:10:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:37,644 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-30 20:10:37,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 20:10:37,644 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-30 20:10:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:37,644 INFO L225 Difference]: With dead ends: 114 [2018-09-30 20:10:37,645 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 20:10:37,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 20:10:37,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 20:10:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 20:10:37,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 20:10:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 20:10:37,647 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-30 20:10:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:37,647 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 20:10:37,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 20:10:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 20:10:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 20:10:37,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:37,648 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-30 20:10:37,648 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:37,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:37,648 INFO L82 PathProgramCache]: Analyzing trace with hash -99679805, now seen corresponding path program 108 times [2018-09-30 20:10:37,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:37,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:37,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:37,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:37,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:42,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:42,303 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 [2018-09-30 20:10:42,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:10:42,440 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 20:10:42,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:42,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:42,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:42,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 20:10:42,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 20:10:42,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 20:10:42,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 20:10:42,489 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-30 20:10:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:42,795 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 20:10:42,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 20:10:42,795 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-30 20:10:42,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:42,796 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:10:42,796 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 20:10:42,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 20:10:42,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 20:10:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 20:10:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 20:10:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 20:10:42,798 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-30 20:10:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:42,799 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 20:10:42,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 20:10:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 20:10:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 20:10:42,799 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:42,799 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-30 20:10:42,799 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:42,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1204895148, now seen corresponding path program 109 times [2018-09-30 20:10:42,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:42,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:42,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:42,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:42,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:47,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:47,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:47,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:47,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:47,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:47,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 20:10:47,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 20:10:47,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 20:10:47,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 20:10:47,410 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-30 20:10:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:47,688 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-30 20:10:47,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 20:10:47,689 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-30 20:10:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:47,689 INFO L225 Difference]: With dead ends: 116 [2018-09-30 20:10:47,689 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:10:47,690 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 20:10:47,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:10:47,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 20:10:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 20:10:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 20:10:47,692 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-30 20:10:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:47,693 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 20:10:47,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 20:10:47,693 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 20:10:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 20:10:47,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:47,693 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-30 20:10:47,694 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:47,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:47,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1302954269, now seen corresponding path program 110 times [2018-09-30 20:10:47,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:47,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:47,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:47,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:47,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:47,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:52,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:52,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:52,274 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:52,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:52,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:52,361 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:52,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:52,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 20:10:52,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 20:10:52,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 20:10:52,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 20:10:52,404 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-30 20:10:52,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:52,745 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 20:10:52,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 20:10:52,746 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-30 20:10:52,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:52,746 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:10:52,746 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:10:52,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 20:10:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:10:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:10:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:10:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 20:10:52,749 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-30 20:10:52,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:52,749 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 20:10:52,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 20:10:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 20:10:52,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:10:52,750 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:52,750 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-30 20:10:52,751 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:52,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:52,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1736874868, now seen corresponding path program 111 times [2018-09-30 20:10:52,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:52,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:52,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:52,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:52,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 20:10:54,384 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:10:54,390 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:10:54,390 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:10:54 BoogieIcfgContainer [2018-09-30 20:10:54,390 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:10:54,391 INFO L168 Benchmark]: Toolchain (without parser) took 232866.89 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -154.1 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 398.6 MB). Peak memory consumption was 244.4 MB. Max. memory is 7.1 GB. [2018-09-30 20:10:54,393 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:10:54,393 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.19 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. [2018-09-30 20:10:54,393 INFO L168 Benchmark]: Boogie Preprocessor took 23.35 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. [2018-09-30 20:10:54,394 INFO L168 Benchmark]: RCFGBuilder took 241.51 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. [2018-09-30 20:10:54,394 INFO L168 Benchmark]: TraceAbstraction took 232555.69 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -154.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 377.4 MB). Peak memory consumption was 223.3 MB. Max. memory is 7.1 GB. [2018-09-30 20:10:54,396 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.19 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 Preprocessor took 23.35 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 241.51 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 232555.69 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -154.1 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 377.4 MB). Peak memory consumption was 223.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 115 with TraceHistMax 111, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 58 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 232.4s OverallTime, 112 OverallIterations, 111 TraceHistogramMax, 23.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 334 SDtfs, 0 SDslu, 4870 SDs, 0 SdLazy, 11196 SolverSat, 164 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12652 GetRequests, 6436 SyntacticMatches, 0 SemanticMatches, 6216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 191.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 111 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 195.4s InterpolantComputationTime, 12873 NumberOfCodeBlocks, 12873 NumberOfCodeBlocksAsserted, 1779 NumberOfCheckSat, 12652 ConstructedInterpolants, 0 QuantifiedInterpolants, 2822278 SizeOfPredicates, 110 NumberOfNonLiveVariables, 38610 ConjunctsInSsa, 6325 ConjunctsInUnsatCore, 221 InterpolantComputations, 1 PerfectInterpolantSequences, 0/455840 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-10-54-405.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-10-54-405.csv Completed graceful shutdown