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/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:20:36,759 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:20:36,761 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:20:36,775 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:20:36,776 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:20:36,777 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:20:36,778 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:20:36,780 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:20:36,781 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:20:36,782 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:20:36,783 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-30 23:20:36,807 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 23:20:36,827 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:20:36,827 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:20:36,828 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:20:36,828 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:20:36,830 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:20:36,830 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:20:36,830 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:20:36,830 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:20:36,831 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:20:36,831 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:20:36,831 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:20:36,831 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:20:36,831 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:20:36,833 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:20:36,833 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:20:36,833 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:20:36,834 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:20:36,835 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:20:36,835 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:20:36,835 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:20:36,835 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:20:36,835 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:20:36,836 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:20:36,836 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:20:36,836 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:20:36,836 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:20:36,837 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:20:36,837 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:20:36,837 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:20:36,837 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:20:36,899 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:20:36,912 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:20:36,919 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:20:36,921 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:20:36,921 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:20:36,922 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-30 23:20:36,922 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl' [2018-09-30 23:20:36,971 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:20:36,974 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:20:36,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:20:36,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:20:36,975 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:20:36,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:36" (1/1) ... [2018-09-30 23:20:37,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:36" (1/1) ... [2018-09-30 23:20:37,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:20:37,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:20:37,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:20:37,017 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:20:37,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:36" (1/1) ... [2018-09-30 23:20:37,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:36" (1/1) ... [2018-09-30 23:20:37,030 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:36" (1/1) ... [2018-09-30 23:20:37,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:36" (1/1) ... [2018-09-30 23:20:37,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:36" (1/1) ... [2018-09-30 23:20:37,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:36" (1/1) ... [2018-09-30 23:20:37,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:36" (1/1) ... [2018-09-30 23:20:37,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:20:37,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:20:37,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:20:37,039 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:20:37,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:36" (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 23:20:37,110 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 23:20:37,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:20:37,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:20:37,316 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:20:37,317 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:20:37 BoogieIcfgContainer [2018-09-30 23:20:37,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:20:37,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:20:37,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:20:37,322 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:20:37,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:20:36" (1/2) ... [2018-09-30 23:20:37,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42eff141 and model type overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:20:37, skipping insertion in model container [2018-09-30 23:20:37,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:20:37" (2/2) ... [2018-09-30 23:20:37,327 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-30 23:20:37,337 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:20:37,349 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:20:37,410 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:20:37,411 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:20:37,413 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:20:37,414 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:20:37,414 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:20:37,414 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:20:37,414 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:20:37,414 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:20:37,415 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:20:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 23:20:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 23:20:37,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:37,449 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 23:20:37,450 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:37,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:37,458 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-30 23:20:37,462 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:37,462 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:37,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:37,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:37,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:37,662 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 23:20:37,665 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:20:37,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:20:37,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:20:37,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:20:37,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:20:37,690 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 23:20:37,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:37,753 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-30 23:20:37,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:20:37,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 23:20:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:37,767 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:20:37,767 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 23:20:37,771 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 23:20:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 23:20:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 23:20:37,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 23:20:37,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 23:20:37,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 23:20:37,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:37,812 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 23:20:37,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:20:37,813 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 23:20:37,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:20:37,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:37,813 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:20:37,814 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:37,814 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:37,814 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-30 23:20:37,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:37,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:37,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:37,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:37,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:37,946 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 23:20:37,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:37,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:37,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:37,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:38,006 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 23:20:38,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:38,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:20:38,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:20:38,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:20:38,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:20:38,045 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-30 23:20:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:38,133 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 23:20:38,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:20:38,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-30 23:20:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:38,134 INFO L225 Difference]: With dead ends: 8 [2018-09-30 23:20:38,135 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 23:20:38,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:20:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 23:20:38,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 23:20:38,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 23:20:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 23:20:38,138 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 23:20:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:38,139 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 23:20:38,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:20:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 23:20:38,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 23:20:38,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:38,140 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 23:20:38,140 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:38,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:38,140 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-30 23:20:38,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:38,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:38,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:38,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:38,222 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 23:20:38,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:38,223 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:20:38,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:38,254 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:38,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:38,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:38,270 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 23:20:38,296 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:38,297 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:20:38,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:20:38,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:20:38,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:20:38,298 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-30 23:20:38,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:38,361 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 23:20:38,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:20:38,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-30 23:20:38,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:38,363 INFO L225 Difference]: With dead ends: 9 [2018-09-30 23:20:38,363 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:20:38,363 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 23:20:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:20:38,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:20:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:20:38,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:20:38,366 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 23:20:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:38,367 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:20:38,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:20:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:20:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:20:38,368 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:38,368 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 23:20:38,368 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:38,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:38,370 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-30 23:20:38,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:38,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:38,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:38,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:38,468 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 23:20:38,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:38,469 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 23:20:38,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:38,498 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 23:20:38,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:38,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:38,506 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 23:20:38,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:38,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:20:38,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:20:38,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:20:38,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:20:38,530 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-30 23:20:38,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:38,586 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 23:20:38,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:20:38,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-30 23:20:38,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:38,588 INFO L225 Difference]: With dead ends: 10 [2018-09-30 23:20:38,588 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 23:20:38,589 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 23:20:38,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 23:20:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 23:20:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 23:20:38,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 23:20:38,592 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 23:20:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:38,592 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 23:20:38,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:20:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 23:20:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 23:20:38,593 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:38,593 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 23:20:38,594 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:38,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:38,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-30 23:20:38,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:38,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:38,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:38,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:38,934 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 23:20:38,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:38,935 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 23:20:38,942 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:38,954 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:38,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:38,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:38,963 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 23:20:38,986 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:38,986 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:20:38,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:20:38,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:20:38,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:20:38,987 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-30 23:20:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:39,040 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:20:39,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:20:39,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-30 23:20:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:39,041 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:20:39,042 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:20:39,042 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:20:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:20:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:20:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:20:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:20:39,046 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 23:20:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:39,046 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:20:39,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:20:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:20:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:20:39,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:39,047 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 23:20:39,048 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:39,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:39,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-30 23:20:39,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:39,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:39,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:39,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:39,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:39,175 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 23:20:39,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:39,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:20:39,184 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:39,213 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 23:20:39,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:39,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:39,227 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 23:20:39,251 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:39,251 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:20:39,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:20:39,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:20:39,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:20:39,252 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-30 23:20:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:39,288 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 23:20:39,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:20:39,291 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-30 23:20:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:39,292 INFO L225 Difference]: With dead ends: 12 [2018-09-30 23:20:39,292 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 23:20:39,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:20:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 23:20:39,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 23:20:39,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 23:20:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 23:20:39,296 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 23:20:39,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:39,296 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 23:20:39,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:20:39,296 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 23:20:39,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 23:20:39,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:39,297 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 23:20:39,297 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:39,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:39,298 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-30 23:20:39,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:39,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:39,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:39,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:39,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:39,432 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 23:20:39,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:39,433 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 23:20:39,446 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:39,458 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 23:20:39,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:39,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:39,467 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 23:20:39,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:39,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:20:39,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:20:39,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:20:39,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:20:39,489 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-30 23:20:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:39,528 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:20:39,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:20:39,529 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-30 23:20:39,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:39,530 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:20:39,530 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:20:39,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:20:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:20:39,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:20:39,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:20:39,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:20:39,535 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 23:20:39,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:39,535 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:20:39,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:20:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:20:39,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:20:39,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:39,536 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 23:20:39,537 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:39,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-30 23:20:39,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:39,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:39,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:39,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:39,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:39,753 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 23:20:39,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:39,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:20:39,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:39,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:39,796 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 23:20:39,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:39,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:20:39,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:20:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:20:39,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:20:39,831 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-30 23:20:40,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:40,062 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 23:20:40,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:20:40,063 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-30 23:20:40,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:40,064 INFO L225 Difference]: With dead ends: 14 [2018-09-30 23:20:40,064 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 23:20:40,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:20:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 23:20:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 23:20:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 23:20:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 23:20:40,070 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 23:20:40,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:40,072 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 23:20:40,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:20:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 23:20:40,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 23:20:40,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:40,073 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 23:20:40,073 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:40,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-30 23:20:40,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:40,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:40,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:40,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:40,258 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 23:20:40,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:40,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:20:40,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:40,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:40,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:40,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:40,289 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 23:20:40,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:40,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:20:40,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:20:40,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:20:40,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:20:40,315 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-30 23:20:40,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:40,464 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:20:40,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:20:40,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-30 23:20:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:40,466 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:20:40,466 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:20:40,467 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 23:20:40,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:20:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:20:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:20:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:20:40,469 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 23:20:40,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:40,470 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:20:40,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:20:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:20:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:20:40,471 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:40,471 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 23:20:40,471 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:40,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:40,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-30 23:20:40,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:40,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:40,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:40,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:40,697 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 23:20:40,698 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:40,699 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 23:20:40,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:40,725 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 23:20:40,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:40,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:40,735 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 23:20:40,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:40,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:20:40,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:20:40,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:20:40,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:20:40,759 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-30 23:20:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:40,795 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 23:20:40,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:20:40,796 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-30 23:20:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:40,797 INFO L225 Difference]: With dead ends: 16 [2018-09-30 23:20:40,797 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 23:20:40,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:20:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 23:20:40,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 23:20:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 23:20:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 23:20:40,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 23:20:40,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:40,803 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 23:20:40,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:20:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 23:20:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 23:20:40,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:40,804 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 23:20:40,804 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:40,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:40,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-30 23:20:40,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:40,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:40,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:40,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:41,197 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 23:20:41,197 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:41,197 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 23:20:41,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:41,221 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:41,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:41,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:41,231 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 23:20:41,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:41,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:20:41,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:20:41,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:20:41,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:20:41,254 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-30 23:20:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:41,291 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:20:41,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:20:41,295 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-30 23:20:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:41,296 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:20:41,297 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:20:41,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:20:41,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:20:41,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:20:41,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:20:41,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:20:41,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 23:20:41,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:41,300 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:20:41,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:20:41,301 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:20:41,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:20:41,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:41,301 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 23:20:41,301 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:41,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:41,302 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-30 23:20:41,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:41,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:41,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:41,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:41,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:41,575 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 23:20:41,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:41,576 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 23:20:41,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:41,678 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 23:20:41,678 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:41,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:41,689 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 23:20:41,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:41,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:20:41,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:20:41,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:20:41,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:20:41,712 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-30 23:20:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:41,777 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 23:20:41,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:20:41,778 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-30 23:20:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:41,778 INFO L225 Difference]: With dead ends: 18 [2018-09-30 23:20:41,778 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 23:20:41,779 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 23:20:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 23:20:41,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 23:20:41,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 23:20:41,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 23:20:41,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 23:20:41,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:41,783 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 23:20:41,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:20:41,783 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 23:20:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 23:20:41,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:41,784 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 23:20:41,784 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:41,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:41,784 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-30 23:20:41,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:41,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:41,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:41,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:41,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:41,968 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 23:20:41,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:41,969 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 23:20:41,978 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:41,992 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:20:41,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:41,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:42,005 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 23:20:42,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:42,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:20:42,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:20:42,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:20:42,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:20:42,033 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-30 23:20:42,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:42,081 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:20:42,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:20:42,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-30 23:20:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:42,085 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:20:42,085 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:20:42,086 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 23:20:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:20:42,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:20:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:20:42,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:20:42,090 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 23:20:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:42,090 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:20:42,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:20:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:20:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:20:42,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:42,091 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 23:20:42,091 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:42,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:42,092 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-30 23:20:42,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:42,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:42,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:42,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:42,325 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 23:20:42,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:42,326 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 23:20:42,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:42,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:42,359 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 23:20:42,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:42,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:20:42,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:20:42,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:20:42,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:20:42,384 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-30 23:20:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:42,692 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 23:20:42,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:20:42,693 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-30 23:20:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:42,694 INFO L225 Difference]: With dead ends: 20 [2018-09-30 23:20:42,694 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 23:20:42,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:20:42,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 23:20:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 23:20:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 23:20:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 23:20:42,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 23:20:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:42,701 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 23:20:42,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:20:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 23:20:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 23:20:42,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:42,702 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 23:20:42,702 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:42,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:42,703 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-30 23:20:42,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:42,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:42,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:42,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:43,046 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 23:20:43,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:43,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:20:43,061 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:43,075 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:43,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:43,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:43,087 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 23:20:43,107 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:43,108 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:20:43,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:20:43,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:20:43,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:20:43,109 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-30 23:20:43,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:43,164 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:20:43,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:20:43,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-30 23:20:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:43,165 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:20:43,165 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:20:43,166 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 23:20:43,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:20:43,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:20:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:20:43,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:20:43,170 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 23:20:43,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:43,171 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:20:43,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:20:43,171 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:20:43,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:20:43,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:43,172 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 23:20:43,172 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:43,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:43,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-30 23:20:43,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:43,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:43,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:43,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:43,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:43,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:43,408 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 23:20:43,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:43,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:20:43,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:43,434 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 23:20:43,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:43,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:43,445 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 23:20:43,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:43,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:20:43,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:20:43,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:20:43,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:20:43,467 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-30 23:20:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:43,521 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 23:20:43,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:20:43,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-30 23:20:43,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:43,522 INFO L225 Difference]: With dead ends: 22 [2018-09-30 23:20:43,523 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 23:20:43,524 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 23:20:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 23:20:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 23:20:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 23:20:43,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 23:20:43,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 23:20:43,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:43,528 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 23:20:43,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:20:43,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 23:20:43,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 23:20:43,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:43,528 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 23:20:43,529 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:43,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-30 23:20:43,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:43,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:43,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:43,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:43,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:43,958 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 23:20:43,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:43,958 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 23:20:43,965 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:44,005 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:44,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:44,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:44,017 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 23:20:44,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:44,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:20:44,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:20:44,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:20:44,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:20:44,048 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-30 23:20:44,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:44,249 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:20:44,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:20:44,249 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-30 23:20:44,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:44,250 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:20:44,250 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:20:44,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:20:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:20:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:20:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:20:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:20:44,254 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 23:20:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:44,254 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:20:44,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:20:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:20:44,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:20:44,255 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:44,255 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 23:20:44,255 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:44,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:44,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-30 23:20:44,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:44,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:44,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:44,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:44,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:44,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:44,604 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 23:20:44,605 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:44,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:20:44,613 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:44,629 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 23:20:44,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:44,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:44,642 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 23:20:44,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:44,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:20:44,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:20:44,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:20:44,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:20:44,673 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-30 23:20:44,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:44,733 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 23:20:44,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:20:44,734 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-30 23:20:44,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:44,735 INFO L225 Difference]: With dead ends: 24 [2018-09-30 23:20:44,735 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 23:20:44,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:20:44,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 23:20:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 23:20:44,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 23:20:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 23:20:44,739 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 23:20:44,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:44,739 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 23:20:44,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:20:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 23:20:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 23:20:44,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:44,741 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 23:20:44,741 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:44,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-30 23:20:44,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:44,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:44,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:44,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:44,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:45,058 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 23:20:45,058 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:45,058 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:20:45,069 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:45,224 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 23:20:45,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:45,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:45,238 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 23:20:45,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:45,272 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:20:45,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:20:45,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:20:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:20:45,273 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-30 23:20:45,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:45,381 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:20:45,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:20:45,381 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-30 23:20:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:45,382 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:20:45,382 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:20:45,383 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 23:20:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:20:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:20:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:20:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:20:45,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 23:20:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:45,387 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:20:45,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:20:45,388 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:20:45,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:20:45,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:45,388 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 23:20:45,389 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:45,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-30 23:20:45,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:45,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:45,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:45,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:45,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:45,700 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 23:20:45,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:45,701 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 23:20:45,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:45,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:45,762 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 23:20:45,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:45,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:20:45,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:20:45,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:20:45,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:20:45,797 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-30 23:20:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:45,876 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 23:20:45,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:20:45,877 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-30 23:20:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:45,878 INFO L225 Difference]: With dead ends: 26 [2018-09-30 23:20:45,878 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 23:20:45,879 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 23:20:45,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 23:20:45,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 23:20:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 23:20:45,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 23:20:45,883 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 23:20:45,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:45,883 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 23:20:45,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:20:45,883 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 23:20:45,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 23:20:45,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:45,884 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 23:20:45,884 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:45,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:45,885 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-30 23:20:45,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:45,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:45,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:45,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:45,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:46,152 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 23:20:46,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:46,152 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 23:20:46,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:46,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:46,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:46,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:46,187 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 23:20:46,217 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:46,218 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:20:46,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:20:46,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:20:46,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:20:46,219 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-30 23:20:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:46,389 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:20:46,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:20:46,390 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-30 23:20:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:46,391 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:20:46,391 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:20:46,392 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:20:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:20:46,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:20:46,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:20:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:20:46,395 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 23:20:46,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:46,395 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:20:46,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:20:46,395 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:20:46,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:20:46,396 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:46,396 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 23:20:46,396 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:46,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:46,397 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-30 23:20:46,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:46,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:46,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:46,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:46,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:46,778 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 23:20:46,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:46,779 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:20:46,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:46,807 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 23:20:46,807 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:46,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:46,817 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 23:20:46,850 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:46,850 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:20:46,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:20:46,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:20:46,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:20:46,851 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-30 23:20:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:46,940 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 23:20:46,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:20:46,942 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-30 23:20:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:46,943 INFO L225 Difference]: With dead ends: 28 [2018-09-30 23:20:46,943 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 23:20:46,943 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 23:20:46,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 23:20:46,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 23:20:46,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 23:20:46,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 23:20:46,947 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 23:20:46,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:46,947 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 23:20:46,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:20:46,947 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 23:20:46,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 23:20:46,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:46,948 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 23:20:46,948 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:46,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:46,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-30 23:20:46,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:46,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:46,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:46,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:46,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:47,267 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 23:20:47,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:47,268 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 23:20:47,276 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:47,293 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:47,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:47,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:47,304 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 23:20:47,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:47,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:20:47,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:20:47,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:20:47,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:20:47,334 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-30 23:20:47,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:47,397 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:20:47,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:20:47,398 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-30 23:20:47,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:47,399 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:20:47,399 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:20:47,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:20:47,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:20:47,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:20:47,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:20:47,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:20:47,404 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 23:20:47,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:47,404 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:20:47,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:20:47,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:20:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:20:47,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:47,405 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 23:20:47,405 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:47,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-30 23:20:47,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:47,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:47,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:47,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:47,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:48,084 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 23:20:48,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:48,084 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 23:20:48,096 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:48,131 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 23:20:48,132 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:48,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:48,145 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 23:20:48,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:48,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:20:48,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:20:48,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:20:48,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:20:48,176 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-30 23:20:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:48,286 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 23:20:48,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:20:48,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-30 23:20:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:48,287 INFO L225 Difference]: With dead ends: 30 [2018-09-30 23:20:48,288 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 23:20:48,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:20:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 23:20:48,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 23:20:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 23:20:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 23:20:48,293 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 23:20:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:48,293 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 23:20:48,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:20:48,294 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 23:20:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 23:20:48,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:48,294 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 23:20:48,295 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:48,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:48,295 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-30 23:20:48,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:48,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:48,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:48,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:48,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:48,962 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 23:20:48,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:48,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:20:48,970 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:48,991 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:20:48,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:48,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:49,002 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 23:20:49,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:49,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 23:20:49,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 23:20:49,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 23:20:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:20:49,033 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-30 23:20:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:49,101 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:20:49,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 23:20:49,102 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-30 23:20:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:49,102 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:20:49,102 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:20:49,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 23:20:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:20:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:20:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:20:49,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:20:49,107 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 23:20:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:49,108 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:20:49,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 23:20:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:20:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:20:49,109 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:49,109 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 23:20:49,109 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:49,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:49,109 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-30 23:20:49,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:49,110 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:49,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:49,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:49,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:49,611 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 23:20:49,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:49,612 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 23:20:49,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:49,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:49,668 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 23:20:49,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:49,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 23:20:49,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 23:20:49,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 23:20:49,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:20:49,691 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-30 23:20:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:49,776 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 23:20:49,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 23:20:49,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-30 23:20:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:49,777 INFO L225 Difference]: With dead ends: 32 [2018-09-30 23:20:49,777 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 23:20:49,778 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 23:20:49,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 23:20:49,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 23:20:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 23:20:49,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 23:20:49,781 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 23:20:49,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:49,781 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 23:20:49,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 23:20:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 23:20:49,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 23:20:49,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:49,782 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 23:20:49,782 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:49,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:49,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-30 23:20:49,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:49,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:49,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:49,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:49,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:50,552 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 23:20:50,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:50,552 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 23:20:50,559 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:50,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:50,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:50,580 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:50,590 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 23:20:50,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:50,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 23:20:50,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 23:20:50,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 23:20:50,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:20:50,612 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-30 23:20:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:50,777 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:20:50,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 23:20:50,777 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-30 23:20:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:50,778 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:20:50,778 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:20:50,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 23:20:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:20:50,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:20:50,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:20:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:20:50,783 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 23:20:50,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:50,783 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:20:50,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 23:20:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:20:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:20:50,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:50,784 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 23:20:50,784 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:50,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-30 23:20:50,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:50,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:50,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:50,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:50,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:52,505 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 23:20:52,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:52,505 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 23:20:52,514 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:52,536 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 23:20:52,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:52,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:52,548 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 23:20:52,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:52,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 23:20:52,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 23:20:52,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 23:20:52,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:20:52,577 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-30 23:20:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:52,628 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 23:20:52,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 23:20:52,629 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-30 23:20:52,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:52,630 INFO L225 Difference]: With dead ends: 34 [2018-09-30 23:20:52,630 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 23:20:52,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 23:20:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 23:20:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 23:20:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 23:20:52,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 23:20:52,634 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 23:20:52,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:52,634 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 23:20:52,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 23:20:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 23:20:52,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 23:20:52,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:52,635 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 23:20:52,635 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:52,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:52,636 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-30 23:20:52,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:52,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:52,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:52,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:52,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:53,405 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 23:20:53,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:53,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:20:53,418 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:53,448 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:53,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:53,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:53,460 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 23:20:53,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:53,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 23:20:53,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 23:20:53,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 23:20:53,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:20:53,482 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-30 23:20:53,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:53,537 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:20:53,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 23:20:53,537 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-30 23:20:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:53,538 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:20:53,538 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:20:53,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 23:20:53,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:20:53,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:20:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:20:53,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:20:53,542 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 23:20:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:53,543 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:20:53,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 23:20:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:20:53,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:20:53,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:53,544 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 23:20:53,544 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:53,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:53,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-30 23:20:53,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:53,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:53,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:53,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:53,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:53,992 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 23:20:53,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:53,992 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 23:20:54,001 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:54,030 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 23:20:54,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:54,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:54,044 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 23:20:54,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:54,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 23:20:54,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 23:20:54,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 23:20:54,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:20:54,075 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-30 23:20:54,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:54,295 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 23:20:54,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 23:20:54,295 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-30 23:20:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:54,296 INFO L225 Difference]: With dead ends: 36 [2018-09-30 23:20:54,296 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 23:20:54,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 23:20:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 23:20:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 23:20:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 23:20:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 23:20:54,300 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 23:20:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:54,301 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 23:20:54,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 23:20:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 23:20:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 23:20:54,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:54,301 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 23:20:54,302 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:54,302 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:54,302 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-30 23:20:54,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:54,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:54,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:54,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:54,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:54,952 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 23:20:54,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:54,952 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 23:20:54,964 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:20:55,000 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 23:20:55,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:55,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:55,015 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 23:20:55,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:55,045 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 23:20:55,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 23:20:55,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 23:20:55,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:20:55,046 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-30 23:20:55,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:55,165 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:20:55,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 23:20:55,165 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-30 23:20:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:55,166 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:20:55,166 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:20:55,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 23:20:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:20:55,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:20:55,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:20:55,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:20:55,170 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 23:20:55,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:55,170 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:20:55,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 23:20:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:20:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:20:55,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:55,171 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 23:20:55,171 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:55,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:55,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-30 23:20:55,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:55,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:55,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:55,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:55,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:55,670 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 23:20:55,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:55,670 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 23:20:55,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:55,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:55,708 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 23:20:55,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:55,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 23:20:55,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 23:20:55,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 23:20:55,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:20:55,731 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-30 23:20:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:55,831 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 23:20:55,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 23:20:55,832 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-30 23:20:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:55,832 INFO L225 Difference]: With dead ends: 38 [2018-09-30 23:20:55,832 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 23:20:55,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 23:20:55,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 23:20:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 23:20:55,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 23:20:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 23:20:55,838 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 23:20:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:55,838 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 23:20:55,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 23:20:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 23:20:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 23:20:55,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:55,839 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 23:20:55,839 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:55,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:55,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-30 23:20:55,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:55,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:55,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:55,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:20:55,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:55,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:56,396 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 23:20:56,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:56,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:20:56,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:20:56,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:20:56,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:56,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:56,437 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 23:20:56,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:56,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 23:20:56,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 23:20:56,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 23:20:56,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 23:20:56,465 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-30 23:20:56,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:56,530 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:20:56,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 23:20:56,531 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-30 23:20:56,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:56,531 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:20:56,531 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:20:56,532 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 23:20:56,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:20:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:20:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:20:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:20:56,535 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 23:20:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:56,536 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:20:56,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 23:20:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:20:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:20:56,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:56,536 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 23:20:56,536 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:56,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:56,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-30 23:20:56,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:56,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:56,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:56,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:56,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:57,079 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 23:20:57,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:57,080 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 23:20:57,088 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:20:57,113 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 23:20:57,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:57,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:57,126 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 23:20:57,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:57,153 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 23:20:57,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 23:20:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 23:20:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:20:57,154 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-30 23:20:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:57,282 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 23:20:57,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 23:20:57,283 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-30 23:20:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:57,284 INFO L225 Difference]: With dead ends: 40 [2018-09-30 23:20:57,284 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 23:20:57,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 23:20:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 23:20:57,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 23:20:57,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 23:20:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 23:20:57,287 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 23:20:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:57,287 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 23:20:57,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 23:20:57,287 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 23:20:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 23:20:57,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:57,288 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 23:20:57,288 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:57,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-30 23:20:57,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:57,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:57,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:57,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:57,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:57,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:58,326 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 23:20:58,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:58,327 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 23:20:58,334 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:20:58,353 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:20:58,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:58,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:58,364 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 23:20:58,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:58,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 23:20:58,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 23:20:58,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 23:20:58,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:20:58,390 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-30 23:20:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:58,451 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:20:58,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 23:20:58,451 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-30 23:20:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:58,452 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:20:58,452 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:20:58,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 23:20:58,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:20:58,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:20:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:20:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:20:58,455 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 23:20:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:58,455 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:20:58,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 23:20:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:20:58,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:20:58,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:58,456 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 23:20:58,456 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:58,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:58,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-30 23:20:58,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:58,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:58,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:58,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:58,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:59,077 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 23:20:59,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:59,078 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 23:20:59,088 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:20:59,120 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 23:20:59,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:20:59,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:20:59,135 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 23:20:59,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:20:59,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 23:20:59,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 23:20:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 23:20:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:20:59,158 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-30 23:20:59,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:20:59,238 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 23:20:59,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 23:20:59,239 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-30 23:20:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:20:59,240 INFO L225 Difference]: With dead ends: 42 [2018-09-30 23:20:59,240 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 23:20:59,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 23:20:59,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 23:20:59,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 23:20:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 23:20:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 23:20:59,244 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 23:20:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:20:59,244 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 23:20:59,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 23:20:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 23:20:59,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 23:20:59,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:20:59,245 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 23:20:59,245 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:20:59,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:20:59,245 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-30 23:20:59,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:20:59,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:20:59,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:59,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:20:59,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:20:59,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:20:59,973 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 23:20:59,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:20:59,973 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 23:20:59,980 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:00,009 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:21:00,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:00,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:00,021 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 23:21:00,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:00,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 23:21:00,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 23:21:00,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 23:21:00,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:21:00,053 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-30 23:21:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:00,577 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:21:00,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 23:21:00,577 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-30 23:21:00,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:00,578 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:21:00,578 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:21:00,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 23:21:00,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:21:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:21:00,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:21:00,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:21:00,581 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 23:21:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:00,581 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:21:00,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 23:21:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:21:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:21:00,582 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:00,582 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 23:21:00,582 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:00,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:00,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-30 23:21:00,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:00,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:00,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:00,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:00,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:00,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:01,300 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 23:21:01,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:01,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:01,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:01,333 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:01,346 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 23:21:01,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:01,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 23:21:01,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 23:21:01,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 23:21:01,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:21:01,372 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-30 23:21:01,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:01,441 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 23:21:01,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 23:21:01,441 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-30 23:21:01,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:01,442 INFO L225 Difference]: With dead ends: 44 [2018-09-30 23:21:01,442 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 23:21:01,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 23:21:01,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 23:21:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 23:21:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 23:21:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 23:21:01,445 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 23:21:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:01,446 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 23:21:01,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 23:21:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 23:21:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 23:21:01,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:01,447 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 23:21:01,447 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:01,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-30 23:21:01,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:01,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:01,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:01,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:01,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:01,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:02,367 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 23:21:02,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:02,368 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 23:21:02,376 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:02,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:02,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:02,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:02,411 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 23:21:02,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:02,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 23:21:02,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 23:21:02,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 23:21:02,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:21:02,441 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-30 23:21:02,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:02,515 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:21:02,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 23:21:02,515 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-30 23:21:02,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:02,516 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:21:02,516 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:21:02,517 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 23:21:02,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:21:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:21:02,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:21:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:21:02,519 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 23:21:02,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:02,519 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:21:02,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 23:21:02,519 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:21:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:21:02,520 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:02,520 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 23:21:02,520 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:02,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:02,520 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-30 23:21:02,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:02,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:02,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:02,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:02,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:03,621 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 23:21:03,621 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:03,621 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 23:21:03,628 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:03,659 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 23:21:03,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:03,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:03,670 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 23:21:03,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:03,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 23:21:03,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 23:21:03,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 23:21:03,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:21:03,692 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-30 23:21:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:03,762 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 23:21:03,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 23:21:03,762 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-30 23:21:03,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:03,763 INFO L225 Difference]: With dead ends: 46 [2018-09-30 23:21:03,763 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 23:21:03,764 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 23:21:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 23:21:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 23:21:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 23:21:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 23:21:03,767 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 23:21:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:03,767 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 23:21:03,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 23:21:03,767 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 23:21:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 23:21:03,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:03,767 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 23:21:03,767 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:03,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:03,768 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-30 23:21:03,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:03,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:03,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:03,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:03,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:04,534 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 23:21:04,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:04,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:04,542 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:04,576 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:04,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:04,579 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:04,603 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 23:21:04,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:04,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 23:21:04,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 23:21:04,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 23:21:04,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:21:04,627 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-30 23:21:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:04,728 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:21:04,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 23:21:04,729 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-30 23:21:04,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:04,730 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:21:04,730 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:21:04,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 23:21:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:21:04,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:21:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:21:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:21:04,732 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 23:21:04,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:04,733 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:21:04,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 23:21:04,733 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:21:04,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:21:04,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:04,733 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 23:21:04,733 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:04,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:04,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-30 23:21:04,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:04,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:04,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:04,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:04,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:05,570 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 23:21:05,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:05,571 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 23:21:05,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:05,616 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 23:21:05,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:05,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:05,631 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 23:21:05,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:05,655 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 23:21:05,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 23:21:05,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 23:21:05,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 23:21:05,656 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-30 23:21:05,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:05,724 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 23:21:05,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 23:21:05,724 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-30 23:21:05,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:05,725 INFO L225 Difference]: With dead ends: 48 [2018-09-30 23:21:05,725 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 23:21:05,726 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 23:21:05,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 23:21:05,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 23:21:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 23:21:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 23:21:05,728 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 23:21:05,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:05,728 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 23:21:05,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 23:21:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 23:21:05,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 23:21:05,729 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:05,729 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 23:21:05,729 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:05,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:05,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-30 23:21:05,730 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:05,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:05,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:05,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:05,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:06,515 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 23:21:06,515 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:06,515 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 23:21:06,522 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:06,557 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 23:21:06,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:06,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:06,570 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 23:21:06,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:06,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 23:21:06,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 23:21:06,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 23:21:06,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:21:06,592 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-30 23:21:06,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:06,668 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:21:06,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 23:21:06,669 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-30 23:21:06,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:06,670 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:21:06,670 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:21:06,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 23:21:06,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:21:06,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:21:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:21:06,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:21:06,674 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 23:21:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:06,674 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:21:06,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 23:21:06,674 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:21:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:21:06,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:06,675 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 23:21:06,675 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:06,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:06,675 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-30 23:21:06,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:06,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:06,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:06,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:06,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:07,521 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 23:21:07,521 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:07,521 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 23:21:07,528 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:07,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:07,567 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 23:21:07,586 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:07,586 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 23:21:07,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 23:21:07,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 23:21:07,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:21:07,588 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-30 23:21:07,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:07,719 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 23:21:07,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 23:21:07,720 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-30 23:21:07,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:07,720 INFO L225 Difference]: With dead ends: 50 [2018-09-30 23:21:07,721 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 23:21:07,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 23:21:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 23:21:07,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 23:21:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 23:21:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 23:21:07,724 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 23:21:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:07,724 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 23:21:07,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 23:21:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 23:21:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 23:21:07,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:07,725 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 23:21:07,725 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:07,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:07,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-30 23:21:07,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:07,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:07,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:07,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:08,960 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 23:21:08,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:08,961 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 23:21:08,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:08,999 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:09,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:09,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:09,012 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 23:21:09,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:09,032 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 23:21:09,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 23:21:09,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 23:21:09,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:21:09,033 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-30 23:21:09,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:09,099 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:21:09,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 23:21:09,099 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-30 23:21:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:09,100 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:21:09,101 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:21:09,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 23:21:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:21:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:21:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:21:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:21:09,104 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 23:21:09,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:09,105 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:21:09,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 23:21:09,105 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:21:09,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:21:09,105 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:09,106 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 23:21:09,106 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:09,106 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:09,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-30 23:21:09,106 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:09,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:09,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:09,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:09,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:10,131 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 23:21:10,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:10,131 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 23:21:10,141 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:10,178 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 23:21:10,178 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:10,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:10,193 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 23:21:10,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:10,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 23:21:10,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 23:21:10,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 23:21:10,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:21:10,216 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-30 23:21:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:10,769 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 23:21:10,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 23:21:10,770 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-30 23:21:10,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:10,771 INFO L225 Difference]: With dead ends: 52 [2018-09-30 23:21:10,771 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 23:21:10,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 23:21:10,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 23:21:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 23:21:10,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 23:21:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 23:21:10,774 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 23:21:10,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:10,774 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 23:21:10,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 23:21:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 23:21:10,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 23:21:10,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:10,775 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 23:21:10,775 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:10,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:10,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-30 23:21:10,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:10,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:10,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:10,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:10,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:12,236 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 23:21:12,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:12,237 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 23:21:12,244 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:12,270 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:12,270 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:12,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:12,284 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 23:21:12,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:12,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 23:21:12,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 23:21:12,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 23:21:12,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:21:12,314 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-30 23:21:12,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:12,388 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:21:12,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 23:21:12,389 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-30 23:21:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:12,390 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:21:12,390 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:21:12,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 23:21:12,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:21:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:21:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:21:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:21:12,392 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 23:21:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:12,392 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:21:12,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 23:21:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:21:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:21:12,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:12,393 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 23:21:12,393 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:12,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-30 23:21:12,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:12,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:12,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:12,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:12,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:13,695 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 23:21:13,696 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:13,696 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:13,703 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:13,744 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 23:21:13,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:13,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:13,762 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 23:21:13,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:13,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 23:21:13,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 23:21:13,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 23:21:13,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:21:13,788 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-30 23:21:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:13,898 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 23:21:13,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 23:21:13,899 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-30 23:21:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:13,900 INFO L225 Difference]: With dead ends: 54 [2018-09-30 23:21:13,900 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 23:21:13,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 23:21:13,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 23:21:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 23:21:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 23:21:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 23:21:13,904 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 23:21:13,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:13,904 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 23:21:13,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 23:21:13,904 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 23:21:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 23:21:13,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:13,905 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 23:21:13,905 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:13,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:13,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-30 23:21:13,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:13,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:13,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:13,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:13,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:15,038 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 23:21:15,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:15,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:15,045 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:15,095 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 23:21:15,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:15,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:15,110 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 23:21:15,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:15,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 23:21:15,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 23:21:15,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 23:21:15,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:21:15,132 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-30 23:21:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:15,230 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:21:15,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 23:21:15,230 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-30 23:21:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:15,231 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:21:15,231 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:21:15,232 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 23:21:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:21:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:21:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:21:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:21:15,236 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 23:21:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:15,236 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:21:15,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 23:21:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:21:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:21:15,237 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:15,237 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 23:21:15,237 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:15,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:15,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-30 23:21:15,238 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:15,238 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:15,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:15,239 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:15,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:16,348 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 23:21:16,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:16,348 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 23:21:16,355 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:16,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:16,396 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 23:21:16,416 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:16,416 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 23:21:16,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 23:21:16,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 23:21:16,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:21:16,417 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-30 23:21:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:16,503 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 23:21:16,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 23:21:16,503 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-30 23:21:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:16,504 INFO L225 Difference]: With dead ends: 56 [2018-09-30 23:21:16,504 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 23:21:16,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 23:21:16,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 23:21:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 23:21:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 23:21:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 23:21:16,508 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 23:21:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:16,509 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 23:21:16,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 23:21:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 23:21:16,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 23:21:16,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:16,509 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 23:21:16,510 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:16,510 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:16,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-30 23:21:16,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:16,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:16,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:16,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:16,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:17,534 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 23:21:17,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:17,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:17,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:17,572 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:17,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:17,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:17,589 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 23:21:17,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:17,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 23:21:17,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 23:21:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 23:21:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:21:17,617 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-30 23:21:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:17,720 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 23:21:17,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 23:21:17,720 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-30 23:21:17,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:17,721 INFO L225 Difference]: With dead ends: 57 [2018-09-30 23:21:17,722 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 23:21:17,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 23:21:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 23:21:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 23:21:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 23:21:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 23:21:17,724 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 23:21:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:17,725 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 23:21:17,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 23:21:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 23:21:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 23:21:17,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:17,726 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 23:21:17,726 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:17,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:17,726 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-30 23:21:17,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:17,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:17,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:17,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:17,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:19,125 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 23:21:19,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:19,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:19,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:19,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 23:21:19,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:19,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:19,191 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 23:21:19,221 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:19,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 23:21:19,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 23:21:19,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 23:21:19,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 23:21:19,222 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-30 23:21:19,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:19,379 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 23:21:19,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 23:21:19,380 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-30 23:21:19,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:19,380 INFO L225 Difference]: With dead ends: 58 [2018-09-30 23:21:19,380 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 23:21:19,381 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 23:21:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 23:21:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 23:21:19,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 23:21:19,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 23:21:19,383 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 23:21:19,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:19,383 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 23:21:19,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 23:21:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 23:21:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 23:21:19,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:19,384 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 23:21:19,384 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:19,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:19,385 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-30 23:21:19,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:19,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:19,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:19,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:19,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:20,605 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 23:21:20,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:20,606 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 23:21:20,613 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:20,643 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:20,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:20,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:20,659 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 23:21:20,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:20,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 23:21:20,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 23:21:20,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 23:21:20,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 23:21:20,690 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-30 23:21:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:21,036 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 23:21:21,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 23:21:21,037 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-30 23:21:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:21,038 INFO L225 Difference]: With dead ends: 59 [2018-09-30 23:21:21,038 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 23:21:21,039 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 23:21:21,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 23:21:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 23:21:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 23:21:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 23:21:21,042 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 23:21:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:21,042 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 23:21:21,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 23:21:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 23:21:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 23:21:21,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:21,043 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 23:21:21,043 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:21,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:21,044 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-30 23:21:21,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:21,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:21,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:21,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:21,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:22,194 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 23:21:22,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:22,194 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 23:21:22,205 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:22,247 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 23:21:22,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:22,249 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:22,259 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 23:21:22,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:22,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 23:21:22,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 23:21:22,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 23:21:22,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 23:21:22,281 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-30 23:21:22,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:22,360 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 23:21:22,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 23:21:22,361 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-30 23:21:22,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:22,362 INFO L225 Difference]: With dead ends: 60 [2018-09-30 23:21:22,362 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 23:21:22,362 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 23:21:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 23:21:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 23:21:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 23:21:22,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 23:21:22,365 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 23:21:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:22,365 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 23:21:22,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 23:21:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 23:21:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 23:21:22,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:22,365 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 23:21:22,366 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:22,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:22,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-30 23:21:22,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:22,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:22,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:22,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:22,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:23,678 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 23:21:23,678 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:23,678 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:21:23,686 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:23,748 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 23:21:23,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:23,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:23,764 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 23:21:23,792 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:23,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 23:21:23,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 23:21:23,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 23:21:23,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 23:21:23,793 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-30 23:21:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:23,924 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 23:21:23,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 23:21:23,925 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-30 23:21:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:23,926 INFO L225 Difference]: With dead ends: 61 [2018-09-30 23:21:23,926 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 23:21:23,926 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 23:21:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 23:21:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 23:21:23,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 23:21:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 23:21:23,929 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 23:21:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:23,929 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 23:21:23,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 23:21:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 23:21:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 23:21:23,929 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:23,930 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 23:21:23,930 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:23,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:23,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-30 23:21:23,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:23,930 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:23,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:23,931 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:23,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:25,124 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 23:21:25,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:25,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:25,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:25,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:25,177 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 23:21:25,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:25,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 23:21:25,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 23:21:25,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 23:21:25,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:21:25,199 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-30 23:21:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:25,314 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 23:21:25,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 23:21:25,314 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-30 23:21:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:25,315 INFO L225 Difference]: With dead ends: 62 [2018-09-30 23:21:25,315 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 23:21:25,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 23:21:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 23:21:25,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 23:21:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 23:21:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 23:21:25,319 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 23:21:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:25,319 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 23:21:25,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 23:21:25,320 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 23:21:25,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 23:21:25,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:25,320 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 23:21:25,320 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:25,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-30 23:21:25,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:25,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:25,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:25,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:25,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:26,611 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 23:21:26,611 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:26,611 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:26,619 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:26,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:26,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:26,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:26,675 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 23:21:26,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:26,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 23:21:26,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 23:21:26,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 23:21:26,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:21:26,700 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-30 23:21:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:26,809 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 23:21:26,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 23:21:26,810 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-30 23:21:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:26,811 INFO L225 Difference]: With dead ends: 63 [2018-09-30 23:21:26,811 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 23:21:26,812 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 23:21:26,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 23:21:26,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 23:21:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 23:21:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 23:21:26,814 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 23:21:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:26,814 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 23:21:26,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 23:21:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 23:21:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 23:21:26,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:26,815 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 23:21:26,816 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:26,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:26,816 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-30 23:21:26,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:26,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:26,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:26,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:26,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:28,170 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 23:21:28,170 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:28,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:28,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:28,228 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 23:21:28,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:28,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:28,246 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 23:21:28,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:28,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 23:21:28,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 23:21:28,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 23:21:28,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:21:28,278 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-30 23:21:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:28,392 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 23:21:28,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 23:21:28,393 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-30 23:21:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:28,393 INFO L225 Difference]: With dead ends: 64 [2018-09-30 23:21:28,393 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 23:21:28,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 23:21:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 23:21:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 23:21:28,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 23:21:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 23:21:28,396 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 23:21:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:28,396 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 23:21:28,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 23:21:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 23:21:28,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 23:21:28,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:28,397 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 23:21:28,397 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:28,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:28,398 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-30 23:21:28,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:28,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:28,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:28,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:30,062 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 23:21:30,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:30,063 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 23:21:30,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:30,105 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:30,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:30,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:30,118 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 23:21:30,137 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:30,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 23:21:30,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 23:21:30,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 23:21:30,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:21:30,139 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-30 23:21:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:30,248 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 23:21:30,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 23:21:30,249 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-30 23:21:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:30,250 INFO L225 Difference]: With dead ends: 65 [2018-09-30 23:21:30,250 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 23:21:30,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 23:21:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 23:21:30,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 23:21:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 23:21:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 23:21:30,253 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 23:21:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:30,253 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 23:21:30,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 23:21:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 23:21:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 23:21:30,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:30,254 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 23:21:30,254 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:30,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:30,254 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-30 23:21:30,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:30,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:30,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:30,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:30,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:30,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:31,929 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 23:21:31,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:31,929 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 23:21:31,940 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:31,987 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 23:21:31,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:31,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:32,004 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 23:21:32,034 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:32,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 23:21:32,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 23:21:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 23:21:32,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:21:32,035 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-30 23:21:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:32,165 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 23:21:32,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 23:21:32,166 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-30 23:21:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:32,166 INFO L225 Difference]: With dead ends: 66 [2018-09-30 23:21:32,166 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 23:21:32,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 23:21:32,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 23:21:32,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 23:21:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 23:21:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 23:21:32,168 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 23:21:32,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:32,169 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 23:21:32,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 23:21:32,169 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 23:21:32,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 23:21:32,169 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:32,169 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 23:21:32,170 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:32,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:32,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-30 23:21:32,170 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:32,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:32,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:32,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:32,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:33,664 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 23:21:33,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:33,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:33,673 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:33,734 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 23:21:33,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:33,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:33,752 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 23:21:33,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:33,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 23:21:33,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 23:21:33,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 23:21:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:21:33,783 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-30 23:21:33,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:33,954 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 23:21:33,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 23:21:33,954 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-30 23:21:33,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:33,955 INFO L225 Difference]: With dead ends: 67 [2018-09-30 23:21:33,955 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 23:21:33,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 23:21:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 23:21:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 23:21:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 23:21:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 23:21:33,957 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 23:21:33,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:33,957 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 23:21:33,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 23:21:33,957 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 23:21:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 23:21:33,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:33,958 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 23:21:33,958 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:33,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:33,958 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-30 23:21:33,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:33,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:33,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:33,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:33,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:35,474 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 23:21:35,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:35,474 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 23:21:35,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:35,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:35,530 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 23:21:35,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:35,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 23:21:35,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 23:21:35,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 23:21:35,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:21:35,551 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-30 23:21:35,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:35,639 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 23:21:35,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 23:21:35,640 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-30 23:21:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:35,641 INFO L225 Difference]: With dead ends: 68 [2018-09-30 23:21:35,641 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 23:21:35,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 23:21:35,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 23:21:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 23:21:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 23:21:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 23:21:35,644 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 23:21:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:35,645 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 23:21:35,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 23:21:35,645 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 23:21:35,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 23:21:35,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:35,645 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 23:21:35,645 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:35,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:35,646 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-30 23:21:35,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:35,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:35,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:35,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:35,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:37,249 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 23:21:37,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:37,249 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 23:21:37,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:37,294 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:37,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:37,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:37,308 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 23:21:37,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:37,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 23:21:37,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 23:21:37,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 23:21:37,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:21:37,339 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-30 23:21:37,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:37,487 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 23:21:37,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 23:21:37,488 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-30 23:21:37,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:37,488 INFO L225 Difference]: With dead ends: 69 [2018-09-30 23:21:37,488 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 23:21:37,489 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 23:21:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 23:21:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 23:21:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 23:21:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 23:21:37,491 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 23:21:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:37,492 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 23:21:37,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 23:21:37,492 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 23:21:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 23:21:37,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:37,492 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 23:21:37,492 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:37,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:37,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-30 23:21:37,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:37,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:37,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:37,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:37,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:39,382 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 23:21:39,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:39,383 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 23:21:39,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:39,454 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 23:21:39,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:39,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:39,468 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 23:21:39,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:39,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 23:21:39,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 23:21:39,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 23:21:39,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:21:39,489 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-30 23:21:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:39,599 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 23:21:39,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 23:21:39,608 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-30 23:21:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:39,608 INFO L225 Difference]: With dead ends: 70 [2018-09-30 23:21:39,609 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 23:21:39,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 23:21:39,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 23:21:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 23:21:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 23:21:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 23:21:39,612 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 23:21:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:39,612 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 23:21:39,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 23:21:39,612 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 23:21:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 23:21:39,613 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:39,613 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 23:21:39,613 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:39,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:39,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-30 23:21:39,614 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:39,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:39,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:39,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:39,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:41,152 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 23:21:41,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:41,152 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 23:21:41,161 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:41,197 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:41,197 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:41,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:41,213 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 23:21:41,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:41,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 23:21:41,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 23:21:41,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 23:21:41,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 23:21:41,246 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-30 23:21:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:41,427 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 23:21:41,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 23:21:41,428 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-30 23:21:41,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:41,429 INFO L225 Difference]: With dead ends: 71 [2018-09-30 23:21:41,429 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 23:21:41,429 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 23:21:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 23:21:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 23:21:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 23:21:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 23:21:41,432 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 23:21:41,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:41,433 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 23:21:41,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 23:21:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 23:21:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 23:21:41,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:41,433 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 23:21:41,433 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:41,433 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:41,434 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-30 23:21:41,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:41,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:41,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:41,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:41,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:43,028 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 23:21:43,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:43,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:43,037 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:43,090 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 23:21:43,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:43,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:43,108 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 23:21:43,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:43,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 23:21:43,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 23:21:43,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 23:21:43,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:21:43,132 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-30 23:21:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:43,415 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 23:21:43,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 23:21:43,415 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-30 23:21:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:43,416 INFO L225 Difference]: With dead ends: 72 [2018-09-30 23:21:43,416 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 23:21:43,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 23:21:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 23:21:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 23:21:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 23:21:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 23:21:43,419 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 23:21:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:43,419 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 23:21:43,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 23:21:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 23:21:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 23:21:43,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:43,420 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 23:21:43,420 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:43,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:43,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-30 23:21:43,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:43,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:43,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:43,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:43,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:45,390 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 23:21:45,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:45,391 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 23:21:45,399 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:45,451 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 23:21:45,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:45,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:45,472 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 23:21:45,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:45,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 23:21:45,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 23:21:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 23:21:45,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:21:45,503 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-30 23:21:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:45,661 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 23:21:45,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 23:21:45,661 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-30 23:21:45,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:45,662 INFO L225 Difference]: With dead ends: 73 [2018-09-30 23:21:45,662 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 23:21:45,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 23:21:45,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 23:21:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 23:21:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 23:21:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 23:21:45,666 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 23:21:45,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:45,666 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 23:21:45,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 23:21:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 23:21:45,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 23:21:45,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:45,666 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 23:21:45,667 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:45,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:45,667 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-30 23:21:45,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:45,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:45,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:45,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:45,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:47,325 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 23:21:47,325 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:47,326 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 23:21:47,332 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:47,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:47,384 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 23:21:47,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:47,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 23:21:47,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 23:21:47,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 23:21:47,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:21:47,407 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-30 23:21:47,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:47,535 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 23:21:47,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 23:21:47,536 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-30 23:21:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:47,537 INFO L225 Difference]: With dead ends: 74 [2018-09-30 23:21:47,537 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 23:21:47,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 23:21:47,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 23:21:47,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 23:21:47,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 23:21:47,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 23:21:47,540 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 23:21:47,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:47,541 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 23:21:47,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 23:21:47,541 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 23:21:47,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 23:21:47,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:47,541 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 23:21:47,541 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:47,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:47,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-30 23:21:47,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:47,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:47,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:47,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:21:47,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:49,708 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 23:21:49,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:49,708 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 23:21:49,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:21:49,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:21:49,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:49,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:49,770 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 23:21:49,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:49,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 23:21:49,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 23:21:49,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 23:21:49,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:21:49,791 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-30 23:21:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:49,987 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 23:21:49,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 23:21:49,987 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-30 23:21:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:49,988 INFO L225 Difference]: With dead ends: 75 [2018-09-30 23:21:49,988 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 23:21:49,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 23:21:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 23:21:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 23:21:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 23:21:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 23:21:49,992 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 23:21:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:49,992 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 23:21:49,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 23:21:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 23:21:49,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 23:21:49,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:49,993 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 23:21:49,993 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:49,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:49,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-30 23:21:49,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:49,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:49,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:49,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:49,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:51,768 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 23:21:51,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:51,768 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 23:21:51,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:21:51,858 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 23:21:51,858 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:51,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:51,876 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 23:21:51,905 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:51,905 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 23:21:51,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 23:21:51,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 23:21:51,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:21:51,906 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-30 23:21:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:52,254 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 23:21:52,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 23:21:52,255 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-30 23:21:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:52,256 INFO L225 Difference]: With dead ends: 76 [2018-09-30 23:21:52,256 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 23:21:52,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 23:21:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 23:21:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 23:21:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 23:21:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 23:21:52,260 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 23:21:52,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:52,260 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 23:21:52,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 23:21:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 23:21:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 23:21:52,261 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:52,261 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-30 23:21:52,261 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:52,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:52,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-30 23:21:52,262 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:52,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:52,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:52,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:52,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:54,644 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 23:21:54,645 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:54,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:54,653 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:21:54,704 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:21:54,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:54,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:54,725 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 23:21:54,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:54,745 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 23:21:54,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 23:21:54,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 23:21:54,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:21:54,747 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-30 23:21:54,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:54,913 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 23:21:54,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 23:21:54,914 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-30 23:21:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:54,914 INFO L225 Difference]: With dead ends: 77 [2018-09-30 23:21:54,914 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 23:21:54,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 23:21:54,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 23:21:54,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 23:21:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 23:21:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 23:21:54,917 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 23:21:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:54,918 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 23:21:54,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 23:21:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 23:21:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 23:21:54,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:54,919 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 23:21:54,919 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:54,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-30 23:21:54,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:54,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:54,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:54,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:54,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:56,847 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 23:21:56,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:56,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:21:56,854 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:21:56,914 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 23:21:56,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:56,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:56,935 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 23:21:56,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:56,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 23:21:56,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 23:21:56,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 23:21:56,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:21:56,968 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-30 23:21:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:57,100 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 23:21:57,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 23:21:57,101 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-30 23:21:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:57,102 INFO L225 Difference]: With dead ends: 78 [2018-09-30 23:21:57,102 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 23:21:57,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 23:21:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 23:21:57,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 23:21:57,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 23:21:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 23:21:57,106 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 23:21:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:57,106 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 23:21:57,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 23:21:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 23:21:57,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 23:21:57,107 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:57,107 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-30 23:21:57,108 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:57,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:57,108 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-30 23:21:57,108 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:57,108 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:57,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:57,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:57,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:21:59,183 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 23:21:59,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:21:59,183 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 23:21:59,190 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:21:59,247 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 23:21:59,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:21:59,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:21:59,268 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 23:21:59,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:21:59,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 23:21:59,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 23:21:59,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 23:21:59,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:21:59,300 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-30 23:21:59,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:21:59,439 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 23:21:59,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 23:21:59,439 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-30 23:21:59,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:21:59,440 INFO L225 Difference]: With dead ends: 79 [2018-09-30 23:21:59,440 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 23:21:59,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 23:21:59,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 23:21:59,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 23:21:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 23:21:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 23:21:59,443 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 23:21:59,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:21:59,443 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 23:21:59,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 23:21:59,443 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 23:21:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 23:21:59,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:21:59,444 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 23:21:59,444 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:21:59,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:21:59,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-30 23:21:59,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:21:59,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:21:59,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:59,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:21:59,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:21:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:02,486 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 23:22:02,487 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:02,487 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 23:22:02,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:02,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:02,548 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 23:22:02,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:02,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 23:22:02,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 23:22:02,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 23:22:02,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:22:02,569 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-30 23:22:02,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:02,719 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 23:22:02,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 23:22:02,719 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-30 23:22:02,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:02,720 INFO L225 Difference]: With dead ends: 80 [2018-09-30 23:22:02,720 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 23:22:02,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 23:22:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 23:22:02,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 23:22:02,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 23:22:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 23:22:02,723 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 23:22:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:02,723 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 23:22:02,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 23:22:02,723 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 23:22:02,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 23:22:02,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:02,724 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-30 23:22:02,724 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:02,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-30 23:22:02,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:02,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:02,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:02,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:02,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:05,090 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 23:22:05,090 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:05,090 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 23:22:05,098 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:05,139 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:05,139 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:05,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:05,159 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 23:22:05,179 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:05,179 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 23:22:05,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 23:22:05,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 23:22:05,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:22:05,181 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-30 23:22:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:05,346 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 23:22:05,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 23:22:05,347 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-30 23:22:05,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:05,348 INFO L225 Difference]: With dead ends: 81 [2018-09-30 23:22:05,348 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 23:22:05,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 23:22:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 23:22:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 23:22:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 23:22:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 23:22:05,352 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 23:22:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:05,352 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 23:22:05,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 23:22:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 23:22:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 23:22:05,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:05,352 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 23:22:05,353 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:05,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:05,353 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-30 23:22:05,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:05,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:05,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:05,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:05,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:08,271 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 23:22:08,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:08,272 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 23:22:08,279 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:08,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 23:22:08,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:08,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:08,359 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 23:22:08,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:08,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 23:22:08,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 23:22:08,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 23:22:08,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:22:08,380 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-30 23:22:08,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:08,691 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 23:22:08,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 23:22:08,692 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-30 23:22:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:08,693 INFO L225 Difference]: With dead ends: 82 [2018-09-30 23:22:08,693 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 23:22:08,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 23:22:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 23:22:08,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 23:22:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 23:22:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 23:22:08,696 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 23:22:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:08,697 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 23:22:08,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 23:22:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 23:22:08,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 23:22:08,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:08,697 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-30 23:22:08,697 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:08,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:08,698 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-30 23:22:08,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:08,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:08,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:08,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:08,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:11,230 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 23:22:11,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:11,231 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 23:22:11,237 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:11,296 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:11,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:11,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:11,319 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 23:22:11,350 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:11,350 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 23:22:11,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 23:22:11,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 23:22:11,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:22:11,352 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-30 23:22:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:11,834 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 23:22:11,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 23:22:11,835 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-30 23:22:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:11,836 INFO L225 Difference]: With dead ends: 83 [2018-09-30 23:22:11,836 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 23:22:11,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 23:22:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 23:22:11,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 23:22:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 23:22:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 23:22:11,840 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 23:22:11,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:11,840 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 23:22:11,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 23:22:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 23:22:11,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 23:22:11,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:11,841 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 23:22:11,841 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:11,841 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:11,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-30 23:22:11,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:11,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:11,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:11,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:11,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:14,361 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 23:22:14,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:14,362 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 23:22:14,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:14,455 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 23:22:14,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:14,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:14,472 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 23:22:14,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:14,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 23:22:14,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 23:22:14,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 23:22:14,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:22:14,494 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-30 23:22:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:14,645 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 23:22:14,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 23:22:14,645 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-30 23:22:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:14,646 INFO L225 Difference]: With dead ends: 84 [2018-09-30 23:22:14,647 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 23:22:14,647 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 23:22:14,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 23:22:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 23:22:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 23:22:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 23:22:14,650 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 23:22:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:14,650 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 23:22:14,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 23:22:14,650 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 23:22:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 23:22:14,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:14,651 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-30 23:22:14,651 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:14,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:14,651 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-30 23:22:14,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:14,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:14,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:14,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:14,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:17,909 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 23:22:17,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:17,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:22:17,917 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:18,288 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 23:22:18,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:18,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:18,312 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 23:22:18,344 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:18,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 23:22:18,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 23:22:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 23:22:18,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:22:18,346 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-30 23:22:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:18,547 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 23:22:18,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 23:22:18,547 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-30 23:22:18,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:18,548 INFO L225 Difference]: With dead ends: 85 [2018-09-30 23:22:18,548 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 23:22:18,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 23:22:18,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 23:22:18,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 23:22:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 23:22:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 23:22:18,552 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 23:22:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:18,552 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 23:22:18,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 23:22:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 23:22:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 23:22:18,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:18,553 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-30 23:22:18,553 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:18,553 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-30 23:22:18,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:18,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:18,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:18,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:18,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:21,333 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 23:22:21,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:21,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:22:21,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:21,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:21,402 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 23:22:21,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:21,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 23:22:21,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 23:22:21,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 23:22:21,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:22:21,425 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-30 23:22:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:21,592 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 23:22:21,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 23:22:21,593 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-30 23:22:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:21,594 INFO L225 Difference]: With dead ends: 86 [2018-09-30 23:22:21,594 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 23:22:21,595 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 23:22:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 23:22:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 23:22:21,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 23:22:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 23:22:21,598 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 23:22:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:21,598 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 23:22:21,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 23:22:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 23:22:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 23:22:21,599 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:21,599 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-30 23:22:21,600 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:21,600 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:21,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-30 23:22:21,600 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:21,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:21,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:21,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:21,601 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:23,989 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 23:22:23,990 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:23,990 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 23:22:23,998 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:24,040 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:24,040 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:24,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:24,064 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 23:22:24,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:24,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 23:22:24,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 23:22:24,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 23:22:24,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:22:24,097 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-30 23:22:25,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:25,803 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 23:22:25,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 23:22:25,804 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-30 23:22:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:25,805 INFO L225 Difference]: With dead ends: 87 [2018-09-30 23:22:25,805 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 23:22:25,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 23:22:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 23:22:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 23:22:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 23:22:25,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 23:22:25,808 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 23:22:25,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:25,808 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 23:22:25,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 23:22:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 23:22:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 23:22:25,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:25,809 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-30 23:22:25,810 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:25,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:25,810 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-30 23:22:25,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:25,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:25,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:25,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:25,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:25,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:28,425 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 23:22:28,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:28,426 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 23:22:28,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:28,501 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 23:22:28,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:28,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:28,526 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 23:22:28,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:28,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 23:22:28,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 23:22:28,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 23:22:28,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:22:28,558 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-30 23:22:28,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:28,754 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 23:22:28,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 23:22:28,754 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-30 23:22:28,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:28,755 INFO L225 Difference]: With dead ends: 88 [2018-09-30 23:22:28,755 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 23:22:28,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 23:22:28,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 23:22:28,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 23:22:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 23:22:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 23:22:28,758 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 23:22:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:28,759 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 23:22:28,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 23:22:28,759 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 23:22:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 23:22:28,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:28,759 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-30 23:22:28,760 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:28,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:28,760 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-30 23:22:28,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:28,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:28,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:28,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:28,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:28,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:31,504 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 23:22:31,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:31,505 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 23:22:31,513 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:31,559 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:31,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:31,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:31,584 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 23:22:31,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:31,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 23:22:31,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 23:22:31,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 23:22:31,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:22:31,619 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-30 23:22:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:33,015 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 23:22:33,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 23:22:33,015 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-30 23:22:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:33,016 INFO L225 Difference]: With dead ends: 89 [2018-09-30 23:22:33,016 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 23:22:33,017 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 23:22:33,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 23:22:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 23:22:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 23:22:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 23:22:33,019 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 23:22:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:33,019 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 23:22:33,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 23:22:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 23:22:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 23:22:33,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:33,020 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-30 23:22:33,021 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:33,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:33,021 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-30 23:22:33,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:33,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:33,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:33,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:33,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:35,757 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 23:22:35,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:35,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:22:35,767 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:35,840 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 23:22:35,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:35,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:35,859 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 23:22:35,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:35,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 23:22:35,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 23:22:35,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 23:22:35,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:22:35,881 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-30 23:22:36,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:36,325 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 23:22:36,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 23:22:36,325 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-30 23:22:36,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:36,326 INFO L225 Difference]: With dead ends: 90 [2018-09-30 23:22:36,326 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 23:22:36,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 23:22:36,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 23:22:36,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 23:22:36,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 23:22:36,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 23:22:36,329 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 23:22:36,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:36,329 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 23:22:36,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 23:22:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 23:22:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 23:22:36,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:36,330 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-30 23:22:36,330 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:36,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-30 23:22:36,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:36,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:36,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:36,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:36,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:38,903 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 23:22:38,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:38,904 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 23:22:38,910 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:38,982 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 23:22:38,982 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:38,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:39,000 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 23:22:39,022 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:39,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 23:22:39,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 23:22:39,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 23:22:39,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:22:39,024 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-30 23:22:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:39,219 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 23:22:39,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 23:22:39,219 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-30 23:22:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:39,220 INFO L225 Difference]: With dead ends: 91 [2018-09-30 23:22:39,220 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 23:22:39,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 23:22:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 23:22:39,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 23:22:39,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 23:22:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 23:22:39,223 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 23:22:39,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:39,223 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 23:22:39,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 23:22:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 23:22:39,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 23:22:39,224 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:39,224 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-30 23:22:39,224 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:39,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-30 23:22:39,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:39,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:39,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:39,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:39,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:42,266 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 23:22:42,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:42,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:22:42,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:42,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:42,334 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 23:22:42,354 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:42,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 23:22:42,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 23:22:42,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 23:22:42,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:22:42,356 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-30 23:22:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:42,513 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 23:22:42,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 23:22:42,514 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-30 23:22:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:42,515 INFO L225 Difference]: With dead ends: 92 [2018-09-30 23:22:42,515 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 23:22:42,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 23:22:42,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 23:22:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 23:22:42,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 23:22:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 23:22:42,517 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 23:22:42,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:42,518 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 23:22:42,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 23:22:42,518 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 23:22:42,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 23:22:42,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:42,519 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-30 23:22:42,519 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:42,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-30 23:22:42,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:42,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:42,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:42,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:22:42,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:45,308 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 23:22:45,308 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:45,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:22:45,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:22:45,372 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:22:45,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:45,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:45,390 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 23:22:45,410 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:45,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 23:22:45,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 23:22:45,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 23:22:45,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:22:45,412 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-30 23:22:45,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:45,705 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 23:22:45,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 23:22:45,706 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-30 23:22:45,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:45,707 INFO L225 Difference]: With dead ends: 93 [2018-09-30 23:22:45,707 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 23:22:45,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 23:22:45,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 23:22:45,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 23:22:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 23:22:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 23:22:45,710 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 23:22:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:45,711 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 23:22:45,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 23:22:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 23:22:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 23:22:45,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:45,712 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-30 23:22:45,712 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:45,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:45,712 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-30 23:22:45,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:45,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:45,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:45,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:45,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:48,458 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 23:22:48,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:48,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:22:48,468 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:22:48,541 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 23:22:48,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:48,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:48,560 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 23:22:48,581 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:48,582 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 23:22:48,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 23:22:48,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 23:22:48,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 23:22:48,583 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-30 23:22:48,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:48,805 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 23:22:48,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 23:22:48,805 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-30 23:22:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:48,806 INFO L225 Difference]: With dead ends: 94 [2018-09-30 23:22:48,806 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 23:22:48,806 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 23:22:48,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 23:22:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 23:22:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 23:22:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 23:22:48,809 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 23:22:48,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:48,809 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 23:22:48,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 23:22:48,809 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 23:22:48,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 23:22:48,810 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:48,810 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-30 23:22:48,810 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:48,810 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:48,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-30 23:22:48,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:48,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:48,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:48,811 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:48,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:52,067 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 23:22:52,067 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:52,067 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 23:22:52,074 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:22:52,121 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:22:52,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:52,124 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:52,146 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 23:22:52,173 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:52,173 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 23:22:52,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 23:22:52,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 23:22:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:22:52,175 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-30 23:22:52,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:52,315 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 23:22:52,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 23:22:52,316 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-30 23:22:52,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:52,317 INFO L225 Difference]: With dead ends: 95 [2018-09-30 23:22:52,317 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 23:22:52,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 23:22:52,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 23:22:52,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 23:22:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 23:22:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 23:22:52,320 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 23:22:52,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:52,320 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 23:22:52,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 23:22:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 23:22:52,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 23:22:52,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:52,321 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-30 23:22:52,321 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:52,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-30 23:22:52,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:52,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:52,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:52,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:52,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:55,157 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 23:22:55,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:55,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:22:55,164 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:22:55,247 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 23:22:55,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:55,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:55,267 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 23:22:55,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:55,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 23:22:55,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 23:22:55,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 23:22:55,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:22:55,290 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-30 23:22:55,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:55,526 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 23:22:55,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 23:22:55,526 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-30 23:22:55,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:55,527 INFO L225 Difference]: With dead ends: 96 [2018-09-30 23:22:55,527 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 23:22:55,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 23:22:55,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 23:22:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 23:22:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 23:22:55,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 23:22:55,531 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 23:22:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:55,531 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 23:22:55,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 23:22:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 23:22:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 23:22:55,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:55,532 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-30 23:22:55,532 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:55,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:55,532 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-30 23:22:55,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:55,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:55,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:55,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:55,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:22:58,704 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 23:22:58,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:22:58,705 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 23:22:58,712 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:22:58,786 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 23:22:58,786 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:22:58,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:22:58,805 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 23:22:58,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:22:58,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 23:22:58,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 23:22:58,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 23:22:58,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:22:58,827 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-30 23:22:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:22:59,069 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 23:22:59,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 23:22:59,069 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-30 23:22:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:22:59,070 INFO L225 Difference]: With dead ends: 97 [2018-09-30 23:22:59,070 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 23:22:59,071 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 23:22:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 23:22:59,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 23:22:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 23:22:59,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 23:22:59,073 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 23:22:59,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:22:59,074 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 23:22:59,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 23:22:59,074 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 23:22:59,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 23:22:59,074 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:22:59,075 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-30 23:22:59,075 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:22:59,075 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:22:59,075 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-30 23:22:59,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:22:59,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:22:59,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:59,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:22:59,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:22:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:02,459 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 23:23:02,459 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:02,459 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 23:23:02,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:02,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:02,537 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 23:23:02,558 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:02,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 23:23:02,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 23:23:02,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 23:23:02,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:23:02,559 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-30 23:23:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:02,772 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 23:23:02,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 23:23:02,773 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-30 23:23:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:02,774 INFO L225 Difference]: With dead ends: 98 [2018-09-30 23:23:02,774 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 23:23:02,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 23:23:02,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 23:23:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 23:23:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 23:23:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 23:23:02,777 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 23:23:02,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:02,777 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 23:23:02,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 23:23:02,778 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 23:23:02,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 23:23:02,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:02,778 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-30 23:23:02,778 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:02,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:02,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-30 23:23:02,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:02,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:02,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:02,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:02,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:06,809 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 23:23:06,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:06,809 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 23:23:06,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:06,866 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:06,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:06,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:06,887 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 23:23:06,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:06,907 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 23:23:06,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 23:23:06,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 23:23:06,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:23:06,908 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-30 23:23:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:07,091 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 23:23:07,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 23:23:07,092 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-30 23:23:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:07,093 INFO L225 Difference]: With dead ends: 99 [2018-09-30 23:23:07,093 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 23:23:07,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 23:23:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 23:23:07,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 23:23:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 23:23:07,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 23:23:07,096 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 23:23:07,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:07,096 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 23:23:07,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 23:23:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 23:23:07,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 23:23:07,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:07,096 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-30 23:23:07,097 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:07,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-30 23:23:07,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:07,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:07,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:07,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:07,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:10,197 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 23:23:10,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:10,198 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 23:23:10,204 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:10,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 23:23:10,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:10,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:10,309 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 23:23:10,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:10,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 23:23:10,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 23:23:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 23:23:10,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:23:10,342 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-30 23:23:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:10,561 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 23:23:10,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 23:23:10,562 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-30 23:23:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:10,562 INFO L225 Difference]: With dead ends: 100 [2018-09-30 23:23:10,563 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 23:23:10,563 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 23:23:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 23:23:10,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 23:23:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 23:23:10,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 23:23:10,565 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 23:23:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:10,565 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 23:23:10,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 23:23:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 23:23:10,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 23:23:10,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:10,566 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-30 23:23:10,566 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:10,566 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:10,566 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-30 23:23:10,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:10,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:10,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:10,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:10,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:14,054 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 23:23:14,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:14,054 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:23:14,061 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:14,113 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:14,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:14,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:14,141 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 23:23:14,170 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:14,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 23:23:14,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 23:23:14,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 23:23:14,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:23:14,172 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-30 23:23:14,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:14,511 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 23:23:14,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 23:23:14,511 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-30 23:23:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:14,512 INFO L225 Difference]: With dead ends: 101 [2018-09-30 23:23:14,512 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 23:23:14,513 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 23:23:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 23:23:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 23:23:14,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 23:23:14,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 23:23:14,516 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 23:23:14,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:14,516 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 23:23:14,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 23:23:14,517 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 23:23:14,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 23:23:14,517 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:14,518 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-30 23:23:14,518 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:14,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:14,518 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-30 23:23:14,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:14,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:14,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:14,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:14,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:18,019 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 23:23:18,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:18,020 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 23:23:18,029 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:18,116 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 23:23:18,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:18,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:18,137 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 23:23:18,160 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:18,160 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 23:23:18,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 23:23:18,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 23:23:18,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 23:23:18,162 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-30 23:23:18,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:18,729 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 23:23:18,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 23:23:18,730 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-30 23:23:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:18,731 INFO L225 Difference]: With dead ends: 102 [2018-09-30 23:23:18,731 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 23:23:18,732 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 23:23:18,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 23:23:18,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 23:23:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 23:23:18,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 23:23:18,735 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 23:23:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:18,735 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 23:23:18,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 23:23:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 23:23:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 23:23:18,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:18,736 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-30 23:23:18,736 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:18,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:18,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-30 23:23:18,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:18,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:18,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:18,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:18,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:18,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:22,250 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 23:23:22,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:22,251 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 23:23:22,260 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:22,342 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 23:23:22,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:22,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:22,363 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 23:23:22,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:22,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 23:23:22,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 23:23:22,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 23:23:22,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:23:22,385 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-30 23:23:22,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:22,649 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 23:23:22,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 23:23:22,649 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-30 23:23:22,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:22,650 INFO L225 Difference]: With dead ends: 103 [2018-09-30 23:23:22,650 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 23:23:22,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 23:23:22,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 23:23:22,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 23:23:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 23:23:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 23:23:22,654 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 23:23:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:22,654 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 23:23:22,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 23:23:22,655 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 23:23:22,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 23:23:22,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:22,655 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-30 23:23:22,655 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:22,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:22,656 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-30 23:23:22,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:22,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:22,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:22,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:22,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:26,060 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 23:23:26,060 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:26,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:23:26,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:26,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:26,138 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 23:23:26,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:26,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 23:23:26,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 23:23:26,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 23:23:26,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:23:26,160 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-30 23:23:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:26,477 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 23:23:26,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 23:23:26,477 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-30 23:23:26,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:26,478 INFO L225 Difference]: With dead ends: 104 [2018-09-30 23:23:26,478 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 23:23:26,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 23:23:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 23:23:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 23:23:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 23:23:26,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 23:23:26,482 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 23:23:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:26,482 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 23:23:26,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 23:23:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 23:23:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 23:23:26,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:26,483 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-30 23:23:26,483 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:26,483 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:26,483 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-30 23:23:26,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:26,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:26,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:26,484 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:26,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:30,045 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 23:23:30,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:30,045 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 23:23:30,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:30,107 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:30,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:30,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:30,136 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 23:23:30,157 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:30,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 23:23:30,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 23:23:30,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 23:23:30,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:23:30,158 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-30 23:23:30,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:30,357 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 23:23:30,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 23:23:30,357 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-30 23:23:30,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:30,358 INFO L225 Difference]: With dead ends: 105 [2018-09-30 23:23:30,358 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 23:23:30,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 23:23:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 23:23:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 23:23:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 23:23:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 23:23:30,361 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 23:23:30,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:30,361 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 23:23:30,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 23:23:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 23:23:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 23:23:30,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:30,362 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-30 23:23:30,362 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:30,362 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:30,362 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-30 23:23:30,362 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:30,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:30,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:30,363 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:30,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:34,201 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 23:23:34,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:34,201 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 23:23:34,208 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:23:34,302 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 23:23:34,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:34,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:34,323 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 23:23:34,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:34,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 23:23:34,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 23:23:34,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 23:23:34,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:23:34,346 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-30 23:23:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:34,611 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-30 23:23:34,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 23:23:34,611 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-30 23:23:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:34,612 INFO L225 Difference]: With dead ends: 106 [2018-09-30 23:23:34,612 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 23:23:34,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 23:23:34,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 23:23:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 23:23:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 23:23:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 23:23:34,616 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 23:23:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:34,616 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 23:23:34,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 23:23:34,616 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 23:23:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 23:23:34,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:34,617 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-30 23:23:34,617 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:34,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:34,617 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-30 23:23:34,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:34,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:34,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:34,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:34,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:38,460 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 23:23:38,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:38,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:23:38,469 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:23:38,523 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:23:38,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:38,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:38,545 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 23:23:38,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:38,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 23:23:38,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 23:23:38,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 23:23:38,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:23:38,568 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-30 23:23:38,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:38,769 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 23:23:38,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 23:23:38,769 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-30 23:23:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:38,770 INFO L225 Difference]: With dead ends: 107 [2018-09-30 23:23:38,770 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 23:23:38,771 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 23:23:38,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 23:23:38,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 23:23:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 23:23:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 23:23:38,774 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-30 23:23:38,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:38,774 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 23:23:38,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 23:23:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 23:23:38,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 23:23:38,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:38,775 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-30 23:23:38,775 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:38,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:38,776 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-30 23:23:38,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:38,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:38,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:38,777 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:38,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:42,773 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 23:23:42,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:42,773 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 23:23:42,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:23:42,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 23:23:42,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:42,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:42,912 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 23:23:42,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:42,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 23:23:42,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 23:23:42,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 23:23:42,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:23:42,935 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-30 23:23:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:43,158 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-30 23:23:43,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 23:23:43,159 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-30 23:23:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:43,160 INFO L225 Difference]: With dead ends: 108 [2018-09-30 23:23:43,160 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 23:23:43,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 23:23:43,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 23:23:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 23:23:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 23:23:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 23:23:43,164 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-30 23:23:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:43,164 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 23:23:43,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 23:23:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 23:23:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 23:23:43,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:43,165 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-30 23:23:43,165 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:43,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:43,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-30 23:23:43,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:43,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:43,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:43,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:43,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:47,158 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 23:23:47,158 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:47,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:23:47,167 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:23:47,259 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 23:23:47,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:47,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:47,283 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 23:23:47,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:47,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 23:23:47,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 23:23:47,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 23:23:47,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:23:47,307 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-30 23:23:47,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:47,592 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 23:23:47,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 23:23:47,592 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-30 23:23:47,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:47,593 INFO L225 Difference]: With dead ends: 109 [2018-09-30 23:23:47,593 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 23:23:47,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 23:23:47,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 23:23:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 23:23:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 23:23:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 23:23:47,598 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-30 23:23:47,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:47,598 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 23:23:47,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 23:23:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 23:23:47,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 23:23:47,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:47,599 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-30 23:23:47,599 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:47,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:47,599 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-30 23:23:47,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:47,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:47,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:47,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:47,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:51,448 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 23:23:51,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:51,448 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 23:23:51,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:51,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:51,538 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 23:23:51,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:51,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 23:23:51,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 23:23:51,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 23:23:51,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:23:51,561 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-30 23:23:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:51,864 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-30 23:23:51,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 23:23:51,865 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-30 23:23:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:51,866 INFO L225 Difference]: With dead ends: 110 [2018-09-30 23:23:51,866 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 23:23:51,867 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 23:23:51,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 23:23:51,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 23:23:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 23:23:51,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 23:23:51,869 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-30 23:23:51,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:51,870 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 23:23:51,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 23:23:51,870 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 23:23:51,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 23:23:51,870 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:51,870 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-30 23:23:51,871 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:51,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:51,871 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-30 23:23:51,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:51,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:51,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:51,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:23:51,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:23:56,042 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 23:23:56,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:23:56,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:23:56,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:23:56,106 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:23:56,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:23:56,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:23:56,135 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 23:23:56,164 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:23:56,165 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 23:23:56,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 23:23:56,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 23:23:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:23:56,166 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-30 23:23:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:23:56,469 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 23:23:56,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 23:23:56,469 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-30 23:23:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:23:56,470 INFO L225 Difference]: With dead ends: 111 [2018-09-30 23:23:56,470 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 23:23:56,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 23:23:56,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 23:23:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 23:23:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 23:23:56,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 23:23:56,472 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-30 23:23:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:23:56,472 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 23:23:56,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 23:23:56,472 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 23:23:56,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 23:23:56,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:23:56,473 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-30 23:23:56,473 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:23:56,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:23:56,473 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-30 23:23:56,473 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:23:56,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:23:56,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:56,474 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:23:56,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:23:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:00,663 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 23:24:00,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:00,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:24:00,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:00,767 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 23:24:00,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:00,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:00,790 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 23:24:00,810 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:00,810 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 23:24:00,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 23:24:00,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 23:24:00,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:24:00,812 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-30 23:24:01,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:01,150 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-30 23:24:01,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 23:24:01,151 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-30 23:24:01,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:01,152 INFO L225 Difference]: With dead ends: 112 [2018-09-30 23:24:01,152 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 23:24:01,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 23:24:01,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 23:24:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 23:24:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 23:24:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 23:24:01,155 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-30 23:24:01,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:01,156 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 23:24:01,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 23:24:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 23:24:01,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 23:24:01,156 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:01,156 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-30 23:24:01,157 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:01,157 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:01,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-30 23:24:01,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:01,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:01,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:01,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:01,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:05,516 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 23:24:05,517 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:05,517 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 23:24:05,526 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:05,582 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:05,582 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:05,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:05,605 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 23:24:05,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:05,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 23:24:05,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 23:24:05,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 23:24:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:24:05,627 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-30 23:24:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:05,987 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 23:24:05,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 23:24:05,987 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-30 23:24:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:05,988 INFO L225 Difference]: With dead ends: 113 [2018-09-30 23:24:05,988 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 23:24:05,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 23:24:05,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 23:24:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 23:24:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 23:24:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 23:24:05,992 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-30 23:24:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:05,992 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 23:24:05,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 23:24:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 23:24:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 23:24:05,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:05,993 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-30 23:24:05,994 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:05,994 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:05,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-30 23:24:05,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:05,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:05,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:05,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:05,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:10,251 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 23:24:10,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:10,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:24:10,259 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:10,368 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 23:24:10,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:10,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:10,392 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 23:24:10,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:10,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 23:24:10,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 23:24:10,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 23:24:10,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:24:10,415 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-30 23:24:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:10,735 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-30 23:24:10,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 23:24:10,735 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-30 23:24:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:10,736 INFO L225 Difference]: With dead ends: 114 [2018-09-30 23:24:10,736 INFO L226 Difference]: Without dead ends: 112 [2018-09-30 23:24:10,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 23:24:10,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-30 23:24:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-30 23:24:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-30 23:24:10,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-30 23:24:10,740 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-30 23:24:10,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:10,740 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-30 23:24:10,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 23:24:10,740 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-30 23:24:10,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-30 23:24:10,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:10,741 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-30 23:24:10,741 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:10,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:10,741 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-30 23:24:10,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:10,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:10,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:10,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:10,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:15,119 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 23:24:15,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:15,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:24:15,137 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:15,237 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 23:24:15,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:15,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:15,263 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 23:24:15,283 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:15,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 23:24:15,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 23:24:15,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 23:24:15,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:24:15,285 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-30 23:24:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:15,595 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 23:24:15,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 23:24:15,596 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-30 23:24:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:15,596 INFO L225 Difference]: With dead ends: 115 [2018-09-30 23:24:15,597 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 23:24:15,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 23:24:15,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 23:24:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 23:24:15,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 23:24:15,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 23:24:15,600 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-30 23:24:15,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:15,600 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 23:24:15,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 23:24:15,600 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 23:24:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 23:24:15,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:15,601 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-30 23:24:15,601 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:15,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-30 23:24:15,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:15,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:15,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:15,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:15,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:15,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:20,082 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 23:24:20,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:20,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:24:20,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:20,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:20,172 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 23:24:20,192 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:20,192 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 23:24:20,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 23:24:20,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 23:24:20,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-30 23:24:20,194 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-30 23:24:20,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:20,469 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-30 23:24:20,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 23:24:20,469 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-30 23:24:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:20,470 INFO L225 Difference]: With dead ends: 116 [2018-09-30 23:24:20,470 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 23:24:20,471 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 23:24:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 23:24:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-30 23:24:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-30 23:24:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-30 23:24:20,474 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-30 23:24:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:20,474 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-30 23:24:20,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 23:24:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-30 23:24:20,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 23:24:20,475 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:20,475 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-30 23:24:20,475 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:20,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:20,475 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-09-30 23:24:20,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:20,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:20,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:20,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:20,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:20,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:25,113 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 23:24:25,113 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:25,113 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 23:24:25,120 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:25,179 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:25,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:25,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:25,202 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 23:24:25,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:25,222 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 23:24:25,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 23:24:25,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 23:24:25,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 23:24:25,224 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-30 23:24:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:25,549 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 23:24:25,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 23:24:25,549 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-30 23:24:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:25,550 INFO L225 Difference]: With dead ends: 117 [2018-09-30 23:24:25,550 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 23:24:25,551 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 23:24:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 23:24:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 23:24:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 23:24:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 23:24:25,554 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-30 23:24:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:25,555 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 23:24:25,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 23:24:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 23:24:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 23:24:25,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:25,556 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-30 23:24:25,556 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:25,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:25,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1489203976, now seen corresponding path program 111 times [2018-09-30 23:24:25,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:25,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:25,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:25,557 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:25,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:30,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:30,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:30,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:24:30,447 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-30 23:24:30,447 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:30,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:30,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:30,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 23:24:30,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 23:24:30,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 23:24:30,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:24:30,492 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-30 23:24:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:30,832 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-30 23:24:30,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 23:24:30,833 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-30 23:24:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:30,834 INFO L225 Difference]: With dead ends: 118 [2018-09-30 23:24:30,834 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 23:24:30,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-30 23:24:30,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 23:24:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 23:24:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 23:24:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-30 23:24:30,838 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-30 23:24:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:30,839 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-30 23:24:30,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 23:24:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-30 23:24:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-30 23:24:30,839 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:30,839 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-30 23:24:30,840 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:30,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:30,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1079318975, now seen corresponding path program 112 times [2018-09-30 23:24:30,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:30,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:30,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:30,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:30,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:35,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:35,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:35,560 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:24:35,631 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:24:35,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:35,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:35,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:35,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 23:24:35,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 23:24:35,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 23:24:35,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:24:35,686 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 115 states. [2018-09-30 23:24:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:36,062 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 23:24:36,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 23:24:36,062 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 115 [2018-09-30 23:24:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:36,063 INFO L225 Difference]: With dead ends: 119 [2018-09-30 23:24:36,063 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 23:24:36,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2018-09-30 23:24:36,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 23:24:36,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 23:24:36,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 23:24:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 23:24:36,065 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-30 23:24:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:36,065 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 23:24:36,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 23:24:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 23:24:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 23:24:36,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:36,066 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-30 23:24:36,067 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:36,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:36,067 INFO L82 PathProgramCache]: Analyzing trace with hash 900848168, now seen corresponding path program 113 times [2018-09-30 23:24:36,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:36,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:36,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:36,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:36,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:40,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:40,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:40,910 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:24:41,025 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-30 23:24:41,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:41,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:41,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:41,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 23:24:41,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 23:24:41,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 23:24:41,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:24:41,091 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 116 states. [2018-09-30 23:24:41,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:41,460 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-30 23:24:41,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 23:24:41,460 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 116 [2018-09-30 23:24:41,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:41,461 INFO L225 Difference]: With dead ends: 120 [2018-09-30 23:24:41,461 INFO L226 Difference]: Without dead ends: 118 [2018-09-30 23:24:41,462 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 23:24:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-30 23:24:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-30 23:24:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-30 23:24:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-30 23:24:41,464 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-30 23:24:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:41,464 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-30 23:24:41,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 23:24:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-30 23:24:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 23:24:41,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:41,465 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-30 23:24:41,465 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:41,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:41,465 INFO L82 PathProgramCache]: Analyzing trace with hash -2138479839, now seen corresponding path program 114 times [2018-09-30 23:24:41,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:41,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:41,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:41,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:41,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:41,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:46,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:46,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:46,384 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:24:46,488 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-30 23:24:46,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:46,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:46,533 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:46,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 23:24:46,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 23:24:46,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 23:24:46,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:24:46,535 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 117 states. [2018-09-30 23:24:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:46,745 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 23:24:46,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 23:24:46,745 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 117 [2018-09-30 23:24:46,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:46,746 INFO L225 Difference]: With dead ends: 121 [2018-09-30 23:24:46,746 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 23:24:46,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2018-09-30 23:24:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 23:24:46,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 23:24:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 23:24:46,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 23:24:46,750 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-30 23:24:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:46,750 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 23:24:46,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 23:24:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 23:24:46,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 23:24:46,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:46,751 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-30 23:24:46,751 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:46,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:46,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1868367544, now seen corresponding path program 115 times [2018-09-30 23:24:46,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:46,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:46,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:46,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:46,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:51,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:51,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:51,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:51,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:51,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:51,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 23:24:51,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 23:24:51,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 23:24:51,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:24:51,790 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 118 states. [2018-09-30 23:24:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:52,187 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-30 23:24:52,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 23:24:52,188 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-09-30 23:24:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:52,188 INFO L225 Difference]: With dead ends: 122 [2018-09-30 23:24:52,189 INFO L226 Difference]: Without dead ends: 120 [2018-09-30 23:24:52,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2018-09-30 23:24:52,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-30 23:24:52,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-30 23:24:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 23:24:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-30 23:24:52,193 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-30 23:24:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:52,193 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-30 23:24:52,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 23:24:52,193 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-30 23:24:52,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-30 23:24:52,193 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:52,194 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-30 23:24:52,194 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:52,194 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:52,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2084820991, now seen corresponding path program 116 times [2018-09-30 23:24:52,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:52,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:52,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:52,195 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:24:52,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:24:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:57,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:24:57,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:24:57,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:24:57,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:24:57,378 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:24:57,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:24:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:24:57,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:24:57,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 23:24:57,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 23:24:57,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 23:24:57,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:24:57,427 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 119 states. [2018-09-30 23:24:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:24:57,824 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 23:24:57,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 23:24:57,825 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 119 [2018-09-30 23:24:57,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:24:57,826 INFO L225 Difference]: With dead ends: 123 [2018-09-30 23:24:57,826 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 23:24:57,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 23:24:57,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 23:24:57,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 23:24:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 23:24:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 23:24:57,829 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-30 23:24:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:24:57,829 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 23:24:57,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 23:24:57,830 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 23:24:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 23:24:57,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:24:57,830 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-30 23:24:57,830 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:24:57,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:24:57,830 INFO L82 PathProgramCache]: Analyzing trace with hash -204943256, now seen corresponding path program 117 times [2018-09-30 23:24:57,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:24:57,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:24:57,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:57,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:24:57,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:24:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:02,975 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:02,975 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:02,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:03,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-30 23:25:03,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:03,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:03,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:03,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 23:25:03,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 23:25:03,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 23:25:03,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:25:03,144 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 120 states. [2018-09-30 23:25:03,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:03,474 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-30 23:25:03,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 23:25:03,474 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 120 [2018-09-30 23:25:03,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:03,475 INFO L225 Difference]: With dead ends: 124 [2018-09-30 23:25:03,475 INFO L226 Difference]: Without dead ends: 122 [2018-09-30 23:25:03,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2018-09-30 23:25:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-30 23:25:03,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-30 23:25:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-30 23:25:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-30 23:25:03,478 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-30 23:25:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:03,478 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-30 23:25:03,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 23:25:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-30 23:25:03,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-30 23:25:03,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:03,479 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-30 23:25:03,479 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:03,479 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:03,479 INFO L82 PathProgramCache]: Analyzing trace with hash -2058275615, now seen corresponding path program 118 times [2018-09-30 23:25:03,479 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:03,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:03,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:03,480 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:03,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:08,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:08,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:08,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:08,792 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:08,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:08,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:08,839 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:08,839 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 23:25:08,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 23:25:08,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 23:25:08,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:25:08,840 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 121 states. [2018-09-30 23:25:09,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:09,108 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 23:25:09,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 23:25:09,108 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 121 [2018-09-30 23:25:09,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:09,109 INFO L225 Difference]: With dead ends: 125 [2018-09-30 23:25:09,109 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 23:25:09,110 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2018-09-30 23:25:09,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 23:25:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 23:25:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 23:25:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 23:25:09,113 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-30 23:25:09,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:09,114 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 23:25:09,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 23:25:09,114 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 23:25:09,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 23:25:09,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:09,114 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-30 23:25:09,115 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:09,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:09,115 INFO L82 PathProgramCache]: Analyzing trace with hash 617963400, now seen corresponding path program 119 times [2018-09-30 23:25:09,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:09,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:09,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:09,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:09,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:14,460 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:14,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:14,468 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:14,599 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-30 23:25:14,599 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:14,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:14,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:14,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 23:25:14,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 23:25:14,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 23:25:14,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:25:14,648 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 122 states. [2018-09-30 23:25:15,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:15,128 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-30 23:25:15,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 23:25:15,128 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-09-30 23:25:15,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:15,129 INFO L225 Difference]: With dead ends: 126 [2018-09-30 23:25:15,129 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 23:25:15,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 23:25:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 23:25:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-30 23:25:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-30 23:25:15,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-30 23:25:15,133 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-30 23:25:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:15,134 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-30 23:25:15,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 23:25:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-30 23:25:15,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 23:25:15,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:15,134 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-30 23:25:15,135 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:15,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:15,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1976994241, now seen corresponding path program 120 times [2018-09-30 23:25:15,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:15,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:15,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:15,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:15,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:20,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:20,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:20,672 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:20,790 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 23:25:20,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:20,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:20,836 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:20,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 23:25:20,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 23:25:20,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 23:25:20,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:25:20,838 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 123 states. [2018-09-30 23:25:21,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:21,197 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 23:25:21,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 23:25:21,197 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 123 [2018-09-30 23:25:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:21,198 INFO L225 Difference]: With dead ends: 127 [2018-09-30 23:25:21,198 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 23:25:21,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2018-09-30 23:25:21,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 23:25:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 23:25:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 23:25:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 23:25:21,201 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-30 23:25:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:21,202 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 23:25:21,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 23:25:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 23:25:21,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 23:25:21,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:21,202 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-30 23:25:21,202 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:21,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:21,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1157277352, now seen corresponding path program 121 times [2018-09-30 23:25:21,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:21,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:21,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:21,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:21,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:21,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:26,606 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:26,606 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:26,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:26,693 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:26,745 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:26,746 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 23:25:26,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 23:25:26,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 23:25:26,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:25:26,747 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 124 states. [2018-09-30 23:25:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:27,202 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-30 23:25:27,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 23:25:27,203 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 124 [2018-09-30 23:25:27,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:27,203 INFO L225 Difference]: With dead ends: 128 [2018-09-30 23:25:27,204 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 23:25:27,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2018-09-30 23:25:27,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 23:25:27,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 23:25:27,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 23:25:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-30 23:25:27,207 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-30 23:25:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:27,207 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-30 23:25:27,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 23:25:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-30 23:25:27,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-30 23:25:27,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:27,208 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-30 23:25:27,208 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:27,208 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1515857569, now seen corresponding path program 122 times [2018-09-30 23:25:27,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:27,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:27,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:27,209 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:25:27,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:32,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:32,746 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:32,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:25:32,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:25:32,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:32,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:32,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:32,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 23:25:32,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 23:25:32,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 23:25:32,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:25:32,875 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 125 states. [2018-09-30 23:25:33,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:33,348 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 23:25:33,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 23:25:33,351 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 125 [2018-09-30 23:25:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:33,351 INFO L225 Difference]: With dead ends: 129 [2018-09-30 23:25:33,351 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 23:25:33,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 23:25:33,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 23:25:33,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 23:25:33,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 23:25:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 23:25:33,354 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-30 23:25:33,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:33,354 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 23:25:33,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 23:25:33,354 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 23:25:33,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 23:25:33,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:33,355 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-30 23:25:33,355 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:33,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:33,356 INFO L82 PathProgramCache]: Analyzing trace with hash -253057592, now seen corresponding path program 123 times [2018-09-30 23:25:33,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:33,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:33,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:33,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:33,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:38,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:38,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:38,964 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:25:39,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-30 23:25:39,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:39,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:39,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:39,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 23:25:39,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 23:25:39,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 23:25:39,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:25:39,130 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 126 states. [2018-09-30 23:25:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:39,603 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-30 23:25:39,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 23:25:39,604 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-09-30 23:25:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:39,604 INFO L225 Difference]: With dead ends: 130 [2018-09-30 23:25:39,604 INFO L226 Difference]: Without dead ends: 128 [2018-09-30 23:25:39,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2018-09-30 23:25:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-30 23:25:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-30 23:25:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-30 23:25:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-30 23:25:39,607 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-30 23:25:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:39,607 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-30 23:25:39,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 23:25:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-30 23:25:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 23:25:39,608 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:39,608 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-30 23:25:39,608 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:39,608 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:39,608 INFO L82 PathProgramCache]: Analyzing trace with hash 745147265, now seen corresponding path program 124 times [2018-09-30 23:25:39,608 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:39,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:39,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:39,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:39,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:45,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:45,488 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:45,496 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:25:45,563 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:25:45,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:45,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:45,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:45,611 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:45,611 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 23:25:45,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 23:25:45,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 23:25:45,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:25:45,613 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 127 states. [2018-09-30 23:25:46,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:46,028 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 23:25:46,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 23:25:46,028 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 127 [2018-09-30 23:25:46,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:46,029 INFO L225 Difference]: With dead ends: 131 [2018-09-30 23:25:46,029 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 23:25:46,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2018-09-30 23:25:46,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 23:25:46,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 23:25:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 23:25:46,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 23:25:46,032 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-30 23:25:46,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:46,032 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 23:25:46,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 23:25:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 23:25:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 23:25:46,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:46,033 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-30 23:25:46,033 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:46,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1624726760, now seen corresponding path program 125 times [2018-09-30 23:25:46,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:46,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:46,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:46,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:46,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:51,762 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:51,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:51,770 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:25:51,909 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-30 23:25:51,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:51,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:51,961 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:51,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 23:25:51,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 23:25:51,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 23:25:51,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:25:51,963 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 128 states. [2018-09-30 23:25:52,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:52,330 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-30 23:25:52,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 23:25:52,330 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 128 [2018-09-30 23:25:52,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:52,331 INFO L225 Difference]: With dead ends: 132 [2018-09-30 23:25:52,331 INFO L226 Difference]: Without dead ends: 130 [2018-09-30 23:25:52,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 23:25:52,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-30 23:25:52,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-30 23:25:52,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 23:25:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-30 23:25:52,335 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-30 23:25:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:52,335 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-30 23:25:52,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 23:25:52,335 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-30 23:25:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-30 23:25:52,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:52,336 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-30 23:25:52,336 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:52,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:52,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1173079967, now seen corresponding path program 126 times [2018-09-30 23:25:52,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:52,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:52,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:52,337 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:52,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:25:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:58,295 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:25:58,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:25:58,302 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:25:58,424 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-30 23:25:58,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:25:58,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:25:58,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:25:58,472 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:25:58,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 23:25:58,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 23:25:58,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 23:25:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:25:58,474 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 129 states. [2018-09-30 23:25:58,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:25:58,878 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 23:25:58,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 23:25:58,879 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 129 [2018-09-30 23:25:58,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:25:58,879 INFO L225 Difference]: With dead ends: 133 [2018-09-30 23:25:58,880 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 23:25:58,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2018-09-30 23:25:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 23:25:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 23:25:58,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 23:25:58,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 23:25:58,883 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-30 23:25:58,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:25:58,884 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 23:25:58,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 23:25:58,884 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 23:25:58,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 23:25:58,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:25:58,885 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-30 23:25:58,885 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:25:58,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:25:58,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2005742584, now seen corresponding path program 127 times [2018-09-30 23:25:58,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:25:58,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:25:58,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:58,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:25:58,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:25:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:05,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:05,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:05,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:05,086 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:05,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:05,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 23:26:05,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 23:26:05,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 23:26:05,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:26:05,133 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 130 states. [2018-09-30 23:26:05,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:05,631 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-30 23:26:05,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 23:26:05,632 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-09-30 23:26:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:05,633 INFO L225 Difference]: With dead ends: 134 [2018-09-30 23:26:05,633 INFO L226 Difference]: Without dead ends: 132 [2018-09-30 23:26:05,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2018-09-30 23:26:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-30 23:26:05,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-30 23:26:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-30 23:26:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-30 23:26:05,638 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-30 23:26:05,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:05,638 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-30 23:26:05,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 23:26:05,638 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-30 23:26:05,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-30 23:26:05,639 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:05,639 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-30 23:26:05,639 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:05,639 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:05,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2048479935, now seen corresponding path program 128 times [2018-09-30 23:26:05,639 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:05,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:05,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:05,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:05,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:11,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:11,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:11,816 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:26:11,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:26:11,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:11,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:11,944 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:11,944 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 23:26:11,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 23:26:11,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 23:26:11,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:26:11,946 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 131 states. [2018-09-30 23:26:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:12,438 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 23:26:12,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 23:26:12,438 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 131 [2018-09-30 23:26:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:12,439 INFO L225 Difference]: With dead ends: 135 [2018-09-30 23:26:12,439 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 23:26:12,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 23:26:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 23:26:12,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 23:26:12,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 23:26:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 23:26:12,444 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-30 23:26:12,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:12,444 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 23:26:12,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 23:26:12,444 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 23:26:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 23:26:12,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:12,445 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-30 23:26:12,445 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:12,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:12,445 INFO L82 PathProgramCache]: Analyzing trace with hash 921629480, now seen corresponding path program 129 times [2018-09-30 23:26:12,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:12,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:12,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:12,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:12,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:18,766 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:18,766 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:18,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:26:18,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-30 23:26:18,902 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:18,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:18,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:18,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 23:26:18,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 23:26:18,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 23:26:18,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:26:18,954 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 132 states. [2018-09-30 23:26:19,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:19,445 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-30 23:26:19,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 23:26:19,445 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 132 [2018-09-30 23:26:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:19,446 INFO L225 Difference]: With dead ends: 136 [2018-09-30 23:26:19,446 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 23:26:19,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8646, Invalid=8646, Unknown=0, NotChecked=0, Total=17292 [2018-09-30 23:26:19,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 23:26:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-30 23:26:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-30 23:26:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-30 23:26:19,450 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-30 23:26:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:19,451 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-30 23:26:19,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 23:26:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-30 23:26:19,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 23:26:19,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:19,452 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-30 23:26:19,452 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:19,452 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:19,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1494259167, now seen corresponding path program 130 times [2018-09-30 23:26:19,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:19,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:19,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:19,453 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:19,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:26,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:26,159 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:26,176 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:26:26,247 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:26:26,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:26,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:26,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:26,299 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 23:26:26,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 23:26:26,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 23:26:26,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:26:26,301 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 133 states. [2018-09-30 23:26:26,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:26,722 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 23:26:26,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 23:26:26,722 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 133 [2018-09-30 23:26:26,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:26,723 INFO L225 Difference]: With dead ends: 137 [2018-09-30 23:26:26,723 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 23:26:26,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2018-09-30 23:26:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 23:26:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 23:26:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 23:26:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 23:26:26,727 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-30 23:26:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:26,728 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 23:26:26,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 23:26:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 23:26:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 23:26:26,728 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:26,728 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-30 23:26:26,729 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:26,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:26,729 INFO L82 PathProgramCache]: Analyzing trace with hash 922604104, now seen corresponding path program 131 times [2018-09-30 23:26:26,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:26,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:26,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:26,729 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:26,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:32,986 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:32,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:32,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:32,993 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:26:33,154 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-30 23:26:33,154 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:33,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:33,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:33,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 23:26:33,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 23:26:33,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 23:26:33,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:26:33,207 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 134 states. [2018-09-30 23:26:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:33,709 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-30 23:26:33,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 23:26:33,709 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-09-30 23:26:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:33,710 INFO L225 Difference]: With dead ends: 138 [2018-09-30 23:26:33,710 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 23:26:33,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8911, Invalid=8911, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 23:26:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 23:26:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 23:26:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 23:26:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-30 23:26:33,713 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-30 23:26:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:33,713 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-30 23:26:33,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 23:26:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-30 23:26:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-30 23:26:33,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:33,713 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-30 23:26:33,714 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:33,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:33,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1464045823, now seen corresponding path program 132 times [2018-09-30 23:26:33,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:33,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:33,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:33,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:33,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:33,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:40,168 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:40,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:40,176 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:26:40,313 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 23:26:40,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:40,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:40,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:40,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 23:26:40,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 23:26:40,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 23:26:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:26:40,366 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 135 states. [2018-09-30 23:26:40,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:40,642 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 23:26:40,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 23:26:40,642 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 135 [2018-09-30 23:26:40,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:40,643 INFO L225 Difference]: With dead ends: 139 [2018-09-30 23:26:40,643 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 23:26:40,644 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9045, Invalid=9045, Unknown=0, NotChecked=0, Total=18090 [2018-09-30 23:26:40,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 23:26:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 23:26:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 23:26:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 23:26:40,647 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-30 23:26:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:40,647 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 23:26:40,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 23:26:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 23:26:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 23:26:40,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:40,648 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-30 23:26:40,648 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:40,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:40,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1859217768, now seen corresponding path program 133 times [2018-09-30 23:26:40,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:40,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:40,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:40,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:40,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:47,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:47,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:47,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:47,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:47,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:47,661 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 23:26:47,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 23:26:47,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 23:26:47,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:26:47,663 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 136 states. [2018-09-30 23:26:48,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:48,089 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-30 23:26:48,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 23:26:48,090 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 136 [2018-09-30 23:26:48,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:48,090 INFO L225 Difference]: With dead ends: 140 [2018-09-30 23:26:48,090 INFO L226 Difference]: Without dead ends: 138 [2018-09-30 23:26:48,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=9180, Invalid=9180, Unknown=0, NotChecked=0, Total=18360 [2018-09-30 23:26:48,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-30 23:26:48,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-30 23:26:48,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-30 23:26:48,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-30 23:26:48,094 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-30 23:26:48,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:48,095 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-30 23:26:48,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 23:26:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-30 23:26:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 23:26:48,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:48,095 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-30 23:26:48,095 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:48,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:48,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1801173985, now seen corresponding path program 134 times [2018-09-30 23:26:48,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:48,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:48,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:48,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:26:48,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:26:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:54,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:26:54,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:26:54,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:26:54,785 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:26:54,785 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:26:54,789 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:26:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:26:54,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:26:54,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 23:26:54,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 23:26:54,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 23:26:54,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:26:54,838 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 137 states. [2018-09-30 23:26:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:26:55,380 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 23:26:55,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 23:26:55,380 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 137 [2018-09-30 23:26:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:26:55,381 INFO L225 Difference]: With dead ends: 141 [2018-09-30 23:26:55,381 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 23:26:55,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 23:26:55,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 23:26:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 23:26:55,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 23:26:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 23:26:55,385 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-30 23:26:55,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:26:55,386 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 23:26:55,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 23:26:55,386 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 23:26:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 23:26:55,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:26:55,386 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-30 23:26:55,387 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:26:55,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:26:55,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1816712, now seen corresponding path program 135 times [2018-09-30 23:26:55,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:26:55,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:26:55,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:55,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:26:55,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:26:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:02,426 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:02,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:02,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:27:02,573 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-30 23:27:02,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:02,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:02,623 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:02,623 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 23:27:02,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 23:27:02,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 23:27:02,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:27:02,625 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 138 states. [2018-09-30 23:27:03,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:03,158 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-09-30 23:27:03,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 23:27:03,159 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-09-30 23:27:03,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:03,159 INFO L225 Difference]: With dead ends: 142 [2018-09-30 23:27:03,160 INFO L226 Difference]: Without dead ends: 140 [2018-09-30 23:27:03,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9453, Invalid=9453, Unknown=0, NotChecked=0, Total=18906 [2018-09-30 23:27:03,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-30 23:27:03,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-30 23:27:03,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 23:27:03,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-30 23:27:03,164 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-09-30 23:27:03,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:03,164 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-30 23:27:03,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 23:27:03,165 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-30 23:27:03,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-30 23:27:03,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:03,165 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-09-30 23:27:03,165 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:03,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:03,166 INFO L82 PathProgramCache]: Analyzing trace with hash 56316097, now seen corresponding path program 136 times [2018-09-30 23:27:03,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:03,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:03,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:03,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:03,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:10,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:10,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:10,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:10,119 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:27:10,190 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:27:10,190 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:10,193 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:10,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:10,243 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 23:27:10,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 23:27:10,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 23:27:10,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:27:10,244 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 139 states. [2018-09-30 23:27:10,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:10,579 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 23:27:10,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 23:27:10,579 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 139 [2018-09-30 23:27:10,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:10,580 INFO L225 Difference]: With dead ends: 143 [2018-09-30 23:27:10,580 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 23:27:10,581 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2018-09-30 23:27:10,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 23:27:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 23:27:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 23:27:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 23:27:10,584 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-09-30 23:27:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:10,584 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 23:27:10,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-30 23:27:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 23:27:10,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 23:27:10,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:10,584 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-09-30 23:27:10,585 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:10,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:10,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1745797032, now seen corresponding path program 137 times [2018-09-30 23:27:10,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:10,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:10,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:10,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:10,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:17,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:17,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:17,812 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:27:17,990 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2018-09-30 23:27:17,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:17,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 0 proven. 9453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:18,044 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:18,044 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 23:27:18,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 23:27:18,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 23:27:18,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:27:18,046 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 140 states. [2018-09-30 23:27:18,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:18,613 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2018-09-30 23:27:18,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 23:27:18,614 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 140 [2018-09-30 23:27:18,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:18,615 INFO L225 Difference]: With dead ends: 144 [2018-09-30 23:27:18,615 INFO L226 Difference]: Without dead ends: 142 [2018-09-30 23:27:18,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=9730, Invalid=9730, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 23:27:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2018-09-30 23:27:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2018-09-30 23:27:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2018-09-30 23:27:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2018-09-30 23:27:18,617 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 140 [2018-09-30 23:27:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:18,617 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2018-09-30 23:27:18,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 23:27:18,618 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2018-09-30 23:27:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2018-09-30 23:27:18,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:18,618 INFO L375 BasicCegarLoop]: trace histogram [138, 1, 1, 1] [2018-09-30 23:27:18,618 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:18,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:18,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1714868831, now seen corresponding path program 138 times [2018-09-30 23:27:18,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:18,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:18,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:18,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:18,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:18,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:25,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:25,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:25,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:27:25,719 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 70 check-sat command(s) [2018-09-30 23:27:25,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:25,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:25,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9591 backedges. 0 proven. 9591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:25,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:25,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-30 23:27:25,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-30 23:27:25,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-30 23:27:25,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-09-30 23:27:25,775 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 141 states. [2018-09-30 23:27:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:26,218 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 23:27:26,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-30 23:27:26,219 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 141 [2018-09-30 23:27:26,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:26,219 INFO L225 Difference]: With dead ends: 145 [2018-09-30 23:27:26,220 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 23:27:26,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=9870, Invalid=9870, Unknown=0, NotChecked=0, Total=19740 [2018-09-30 23:27:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 23:27:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 23:27:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 23:27:26,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 23:27:26,224 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 141 [2018-09-30 23:27:26,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:26,224 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 23:27:26,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-30 23:27:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 23:27:26,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 23:27:26,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:26,225 INFO L375 BasicCegarLoop]: trace histogram [139, 1, 1, 1] [2018-09-30 23:27:26,226 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:26,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1621328184, now seen corresponding path program 139 times [2018-09-30 23:27:26,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:26,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:26,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:26,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:26,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:33,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:33,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:33,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:33,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:33,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9730 backedges. 0 proven. 9730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:33,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:33,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-30 23:27:33,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 23:27:33,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 23:27:33,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:27:33,725 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 142 states. [2018-09-30 23:27:34,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:34,280 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2018-09-30 23:27:34,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 23:27:34,281 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-09-30 23:27:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:34,281 INFO L225 Difference]: With dead ends: 146 [2018-09-30 23:27:34,281 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 23:27:34,282 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10011, Invalid=10011, Unknown=0, NotChecked=0, Total=20022 [2018-09-30 23:27:34,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 23:27:34,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2018-09-30 23:27:34,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2018-09-30 23:27:34,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 144 transitions. [2018-09-30 23:27:34,284 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 144 transitions. Word has length 142 [2018-09-30 23:27:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:34,284 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 144 transitions. [2018-09-30 23:27:34,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 23:27:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 144 transitions. [2018-09-30 23:27:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 23:27:34,285 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:34,285 INFO L375 BasicCegarLoop]: trace histogram [140, 1, 1, 1] [2018-09-30 23:27:34,285 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:34,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1278431873, now seen corresponding path program 140 times [2018-09-30 23:27:34,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:34,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:34,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:34,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:27:34,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:41,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:41,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:41,500 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:27:41,573 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:27:41,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:41,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 0 proven. 9870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:41,627 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:41,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-30 23:27:41,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 23:27:41,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 23:27:41,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:27:41,630 INFO L87 Difference]: Start difference. First operand 144 states and 144 transitions. Second operand 143 states. [2018-09-30 23:27:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:42,215 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 23:27:42,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 23:27:42,216 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 143 [2018-09-30 23:27:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:42,216 INFO L225 Difference]: With dead ends: 147 [2018-09-30 23:27:42,217 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 23:27:42,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=10153, Invalid=10153, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 23:27:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 23:27:42,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 23:27:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 23:27:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 23:27:42,220 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 143 [2018-09-30 23:27:42,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:42,220 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 23:27:42,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 23:27:42,220 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 23:27:42,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 23:27:42,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:42,221 INFO L375 BasicCegarLoop]: trace histogram [141, 1, 1, 1] [2018-09-30 23:27:42,221 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:42,221 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:42,221 INFO L82 PathProgramCache]: Analyzing trace with hash 976680424, now seen corresponding path program 141 times [2018-09-30 23:27:42,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:42,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:42,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:42,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:42,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:49,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:49,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:49,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:27:49,877 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 72 check-sat command(s) [2018-09-30 23:27:49,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:49,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10011 backedges. 0 proven. 10011 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:49,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:49,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-30 23:27:49,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 23:27:49,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 23:27:49,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:27:49,933 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 144 states. [2018-09-30 23:27:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:50,456 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-09-30 23:27:50,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 23:27:50,457 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 144 [2018-09-30 23:27:50,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:50,458 INFO L225 Difference]: With dead ends: 148 [2018-09-30 23:27:50,458 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 23:27:50,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=10296, Invalid=10296, Unknown=0, NotChecked=0, Total=20592 [2018-09-30 23:27:50,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 23:27:50,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 23:27:50,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 23:27:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 146 transitions. [2018-09-30 23:27:50,462 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 146 transitions. Word has length 144 [2018-09-30 23:27:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:50,462 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 146 transitions. [2018-09-30 23:27:50,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 23:27:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 146 transitions. [2018-09-30 23:27:50,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2018-09-30 23:27:50,462 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:50,462 INFO L375 BasicCegarLoop]: trace histogram [142, 1, 1, 1] [2018-09-30 23:27:50,462 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:50,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:50,463 INFO L82 PathProgramCache]: Analyzing trace with hash 212320097, now seen corresponding path program 142 times [2018-09-30 23:27:50,463 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:50,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:50,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:50,463 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:50,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:27:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:58,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:27:58,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:27:58,207 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:27:58,292 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:27:58,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:27:58,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:27:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10153 backedges. 0 proven. 10153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:27:58,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:27:58,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-30 23:27:58,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-30 23:27:58,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-30 23:27:58,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-09-30 23:27:58,374 INFO L87 Difference]: Start difference. First operand 146 states and 146 transitions. Second operand 145 states. [2018-09-30 23:27:58,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:27:58,953 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 23:27:58,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 23:27:58,953 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 145 [2018-09-30 23:27:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:27:58,954 INFO L225 Difference]: With dead ends: 149 [2018-09-30 23:27:58,954 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 23:27:58,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=10440, Invalid=10440, Unknown=0, NotChecked=0, Total=20880 [2018-09-30 23:27:58,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 23:27:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 23:27:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 23:27:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 23:27:58,958 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 145 [2018-09-30 23:27:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:27:58,958 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 23:27:58,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-30 23:27:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 23:27:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 23:27:58,958 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:27:58,959 INFO L375 BasicCegarLoop]: trace histogram [143, 1, 1, 1] [2018-09-30 23:27:58,959 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:27:58,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:27:58,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2008013560, now seen corresponding path program 143 times [2018-09-30 23:27:58,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:27:58,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:27:58,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:58,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:27:58,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:27:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:06,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:06,361 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:06,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:28:06,544 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 73 check-sat command(s) [2018-09-30 23:28:06,544 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:06,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 0 proven. 10296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:06,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:06,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-30 23:28:06,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 23:28:06,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 23:28:06,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:28:06,602 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 146 states. [2018-09-30 23:28:07,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:07,223 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2018-09-30 23:28:07,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 23:28:07,224 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-09-30 23:28:07,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:07,224 INFO L225 Difference]: With dead ends: 150 [2018-09-30 23:28:07,224 INFO L226 Difference]: Without dead ends: 148 [2018-09-30 23:28:07,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=10585, Invalid=10585, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 23:28:07,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-09-30 23:28:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-09-30 23:28:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-30 23:28:07,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-09-30 23:28:07,229 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 146 [2018-09-30 23:28:07,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:07,229 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-09-30 23:28:07,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 23:28:07,229 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-09-30 23:28:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 23:28:07,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:07,230 INFO L375 BasicCegarLoop]: trace histogram [144, 1, 1, 1] [2018-09-30 23:28:07,230 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:07,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:07,231 INFO L82 PathProgramCache]: Analyzing trace with hash -2118880191, now seen corresponding path program 144 times [2018-09-30 23:28:07,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:07,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:07,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:07,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:07,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:15,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:15,066 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:15,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:15,075 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:28:15,227 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 23:28:15,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:15,231 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10440 backedges. 0 proven. 10440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:15,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:15,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-30 23:28:15,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-30 23:28:15,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-30 23:28:15,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:28:15,283 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 147 states. [2018-09-30 23:28:15,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:15,727 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 23:28:15,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 23:28:15,728 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 147 [2018-09-30 23:28:15,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:15,729 INFO L225 Difference]: With dead ends: 151 [2018-09-30 23:28:15,729 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 23:28:15,730 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=10731, Invalid=10731, Unknown=0, NotChecked=0, Total=21462 [2018-09-30 23:28:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 23:28:15,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 23:28:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 23:28:15,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 23:28:15,733 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 147 [2018-09-30 23:28:15,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:15,733 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 23:28:15,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-30 23:28:15,733 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 23:28:15,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 23:28:15,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:15,734 INFO L375 BasicCegarLoop]: trace histogram [145, 1, 1, 1] [2018-09-30 23:28:15,734 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:15,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:15,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1260778456, now seen corresponding path program 145 times [2018-09-30 23:28:15,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:15,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:15,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:15,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:15,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:23,284 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:23,284 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:23,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:23,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10585 backedges. 0 proven. 10585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:23,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:23,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-30 23:28:23,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 23:28:23,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 23:28:23,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:28:23,438 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 148 states. [2018-09-30 23:28:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:24,114 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2018-09-30 23:28:24,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-30 23:28:24,115 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 148 [2018-09-30 23:28:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:24,115 INFO L225 Difference]: With dead ends: 152 [2018-09-30 23:28:24,116 INFO L226 Difference]: Without dead ends: 150 [2018-09-30 23:28:24,116 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=10878, Invalid=10878, Unknown=0, NotChecked=0, Total=21756 [2018-09-30 23:28:24,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-09-30 23:28:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2018-09-30 23:28:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 23:28:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 150 transitions. [2018-09-30 23:28:24,118 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 150 transitions. Word has length 148 [2018-09-30 23:28:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:24,118 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 150 transitions. [2018-09-30 23:28:24,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 23:28:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 150 transitions. [2018-09-30 23:28:24,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-09-30 23:28:24,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:24,119 INFO L375 BasicCegarLoop]: trace histogram [146, 1, 1, 1] [2018-09-30 23:28:24,119 INFO L423 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:24,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:24,119 INFO L82 PathProgramCache]: Analyzing trace with hash -429428447, now seen corresponding path program 146 times [2018-09-30 23:28:24,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:24,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:24,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:24,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:28:24,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:32,056 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:32,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:32,063 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:28:32,141 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:28:32,141 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:32,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 0 proven. 10731 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:32,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:32,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-09-30 23:28:32,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 23:28:32,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 23:28:32,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:28:32,198 INFO L87 Difference]: Start difference. First operand 150 states and 150 transitions. Second operand 149 states. [2018-09-30 23:28:32,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:32,621 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 23:28:32,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 23:28:32,622 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 149 [2018-09-30 23:28:32,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:32,623 INFO L225 Difference]: With dead ends: 153 [2018-09-30 23:28:32,623 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 23:28:32,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=11026, Invalid=11026, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 23:28:32,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 23:28:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 23:28:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 23:28:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 23:28:32,626 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 149 [2018-09-30 23:28:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:32,626 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 23:28:32,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 23:28:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 23:28:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 23:28:32,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:32,627 INFO L375 BasicCegarLoop]: trace histogram [147, 1, 1, 1] [2018-09-30 23:28:32,628 INFO L423 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:32,628 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:32,628 INFO L82 PathProgramCache]: Analyzing trace with hash -427381944, now seen corresponding path program 147 times [2018-09-30 23:28:32,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:32,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:32,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:32,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:32,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:40,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:40,880 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:40,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:28:41,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 75 check-sat command(s) [2018-09-30 23:28:41,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:41,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10878 backedges. 0 proven. 10878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:41,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:41,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-30 23:28:41,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 23:28:41,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 23:28:41,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:28:41,116 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 150 states. [2018-09-30 23:28:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:41,683 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2018-09-30 23:28:41,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-30 23:28:41,683 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-09-30 23:28:41,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:41,684 INFO L225 Difference]: With dead ends: 154 [2018-09-30 23:28:41,684 INFO L226 Difference]: Without dead ends: 152 [2018-09-30 23:28:41,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=11175, Invalid=11175, Unknown=0, NotChecked=0, Total=22350 [2018-09-30 23:28:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-09-30 23:28:41,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2018-09-30 23:28:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2018-09-30 23:28:41,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2018-09-30 23:28:41,688 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 150 [2018-09-30 23:28:41,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:41,688 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2018-09-30 23:28:41,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 23:28:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2018-09-30 23:28:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2018-09-30 23:28:41,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:41,689 INFO L375 BasicCegarLoop]: trace histogram [148, 1, 1, 1] [2018-09-30 23:28:41,689 INFO L423 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:41,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:41,689 INFO L82 PathProgramCache]: Analyzing trace with hash -363940351, now seen corresponding path program 148 times [2018-09-30 23:28:41,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:41,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:41,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:41,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:41,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:49,897 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:49,897 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:49,897 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:49,904 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:28:49,983 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:28:49,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:49,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11026 backedges. 0 proven. 11026 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:50,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:50,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-09-30 23:28:50,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-09-30 23:28:50,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-09-30 23:28:50,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:28:50,040 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 151 states. [2018-09-30 23:28:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:50,687 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 23:28:50,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-30 23:28:50,687 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 151 [2018-09-30 23:28:50,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:50,688 INFO L225 Difference]: With dead ends: 155 [2018-09-30 23:28:50,688 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 23:28:50,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=11325, Invalid=11325, Unknown=0, NotChecked=0, Total=22650 [2018-09-30 23:28:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 23:28:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 23:28:50,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 23:28:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 23:28:50,692 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 151 [2018-09-30 23:28:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:50,692 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 23:28:50,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-09-30 23:28:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 23:28:50,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 23:28:50,693 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:50,693 INFO L375 BasicCegarLoop]: trace histogram [149, 1, 1, 1] [2018-09-30 23:28:50,693 INFO L423 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:50,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1602749032, now seen corresponding path program 149 times [2018-09-30 23:28:50,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:50,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:50,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:50,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:50,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:28:58,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:58,677 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:28:58,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:28:58,685 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:28:58,869 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2018-09-30 23:28:58,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:28:58,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:28:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 0 proven. 11175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:28:58,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:28:58,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-30 23:28:58,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 23:28:58,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 23:28:58,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:28:58,930 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 152 states. [2018-09-30 23:28:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:28:59,495 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2018-09-30 23:28:59,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2018-09-30 23:28:59,496 INFO L78 Accepts]: Start accepts. Automaton has 152 states. Word has length 152 [2018-09-30 23:28:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:28:59,496 INFO L225 Difference]: With dead ends: 156 [2018-09-30 23:28:59,496 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 23:28:59,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=11476, Invalid=11476, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 23:28:59,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 23:28:59,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-09-30 23:28:59,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2018-09-30 23:28:59,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 154 transitions. [2018-09-30 23:28:59,500 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 154 transitions. Word has length 152 [2018-09-30 23:28:59,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:28:59,500 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 154 transitions. [2018-09-30 23:28:59,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 152 states. [2018-09-30 23:28:59,500 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 154 transitions. [2018-09-30 23:28:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 23:28:59,501 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:28:59,501 INFO L375 BasicCegarLoop]: trace histogram [150, 1, 1, 1] [2018-09-30 23:28:59,501 INFO L423 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:28:59,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:28:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1854389535, now seen corresponding path program 150 times [2018-09-30 23:28:59,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:28:59,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:28:59,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:59,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:28:59,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:28:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:07,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:07,691 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:07,698 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:29:07,871 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 76 check-sat command(s) [2018-09-30 23:29:07,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:07,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 11325 backedges. 0 proven. 11325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:07,928 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:07,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [152, 152] total 152 [2018-09-30 23:29:07,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 153 states [2018-09-30 23:29:07,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2018-09-30 23:29:07,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-09-30 23:29:07,930 INFO L87 Difference]: Start difference. First operand 154 states and 154 transitions. Second operand 153 states. [2018-09-30 23:29:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:08,284 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 23:29:08,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2018-09-30 23:29:08,285 INFO L78 Accepts]: Start accepts. Automaton has 153 states. Word has length 153 [2018-09-30 23:29:08,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:08,285 INFO L225 Difference]: With dead ends: 157 [2018-09-30 23:29:08,286 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 23:29:08,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=11628, Invalid=11628, Unknown=0, NotChecked=0, Total=23256 [2018-09-30 23:29:08,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 23:29:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 23:29:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 23:29:08,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 23:29:08,289 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 153 [2018-09-30 23:29:08,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:08,290 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 23:29:08,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 153 states. [2018-09-30 23:29:08,290 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 23:29:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 23:29:08,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:08,290 INFO L375 BasicCegarLoop]: trace histogram [151, 1, 1, 1] [2018-09-30 23:29:08,290 INFO L423 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:08,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1651502712, now seen corresponding path program 151 times [2018-09-30 23:29:08,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:08,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:08,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:08,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:08,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:16,827 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:16,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:16,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:16,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:16,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:16,918 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 0 proven. 11476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:16,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:16,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [153, 153] total 153 [2018-09-30 23:29:16,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-09-30 23:29:16,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-09-30 23:29:16,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:29:16,973 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 154 states. [2018-09-30 23:29:17,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:17,585 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-09-30 23:29:17,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2018-09-30 23:29:17,585 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-09-30 23:29:17,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:17,585 INFO L225 Difference]: With dead ends: 158 [2018-09-30 23:29:17,586 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 23:29:17,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=11781, Invalid=11781, Unknown=0, NotChecked=0, Total=23562 [2018-09-30 23:29:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 23:29:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 23:29:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 23:29:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 156 transitions. [2018-09-30 23:29:17,590 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 156 transitions. Word has length 154 [2018-09-30 23:29:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:17,590 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 156 transitions. [2018-09-30 23:29:17,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-09-30 23:29:17,590 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 156 transitions. [2018-09-30 23:29:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2018-09-30 23:29:17,591 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:17,591 INFO L375 BasicCegarLoop]: trace histogram [152, 1, 1, 1] [2018-09-30 23:29:17,591 INFO L423 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:17,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:17,591 INFO L82 PathProgramCache]: Analyzing trace with hash 343021505, now seen corresponding path program 152 times [2018-09-30 23:29:17,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:17,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:17,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:17,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:29:17,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:26,237 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:26,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:26,244 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:29:26,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:29:26,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:26,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 0 proven. 11628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:26,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:26,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [154, 154] total 154 [2018-09-30 23:29:26,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 155 states [2018-09-30 23:29:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2018-09-30 23:29:26,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:29:26,388 INFO L87 Difference]: Start difference. First operand 156 states and 156 transitions. Second operand 155 states. [2018-09-30 23:29:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:27,127 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 23:29:27,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2018-09-30 23:29:27,128 INFO L78 Accepts]: Start accepts. Automaton has 155 states. Word has length 155 [2018-09-30 23:29:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:27,129 INFO L225 Difference]: With dead ends: 159 [2018-09-30 23:29:27,129 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 23:29:27,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=11935, Invalid=11935, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 23:29:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 23:29:27,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 23:29:27,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 23:29:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 23:29:27,133 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 155 [2018-09-30 23:29:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:27,134 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 23:29:27,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 155 states. [2018-09-30 23:29:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 23:29:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 23:29:27,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:27,135 INFO L375 BasicCegarLoop]: trace histogram [153, 1, 1, 1] [2018-09-30 23:29:27,135 INFO L423 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:27,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:27,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2043730088, now seen corresponding path program 153 times [2018-09-30 23:29:27,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:27,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:27,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:27,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:27,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:35,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:35,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:35,884 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:29:36,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 78 check-sat command(s) [2018-09-30 23:29:36,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:36,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 11781 backedges. 0 proven. 11781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:36,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:36,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [155, 155] total 155 [2018-09-30 23:29:36,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 156 states [2018-09-30 23:29:36,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2018-09-30 23:29:36,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:29:36,133 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 156 states. [2018-09-30 23:29:36,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:36,928 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2018-09-30 23:29:36,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2018-09-30 23:29:36,929 INFO L78 Accepts]: Start accepts. Automaton has 156 states. Word has length 156 [2018-09-30 23:29:36,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:36,929 INFO L225 Difference]: With dead ends: 160 [2018-09-30 23:29:36,929 INFO L226 Difference]: Without dead ends: 158 [2018-09-30 23:29:36,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=12090, Invalid=12090, Unknown=0, NotChecked=0, Total=24180 [2018-09-30 23:29:36,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-09-30 23:29:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-09-30 23:29:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-09-30 23:29:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-09-30 23:29:36,934 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 156 [2018-09-30 23:29:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:36,934 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-09-30 23:29:36,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 156 states. [2018-09-30 23:29:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-09-30 23:29:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 23:29:36,934 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:36,934 INFO L375 BasicCegarLoop]: trace histogram [154, 1, 1, 1] [2018-09-30 23:29:36,935 INFO L423 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:36,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:36,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1068878687, now seen corresponding path program 154 times [2018-09-30 23:29:36,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:36,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:36,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:36,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:36,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:45,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:45,772 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:45,780 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:29:45,865 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:29:45,865 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:45,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:45,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:45,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [156, 156] total 156 [2018-09-30 23:29:45,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 157 states [2018-09-30 23:29:45,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2018-09-30 23:29:45,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-09-30 23:29:45,924 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 157 states. [2018-09-30 23:29:46,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:46,765 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 23:29:46,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2018-09-30 23:29:46,766 INFO L78 Accepts]: Start accepts. Automaton has 157 states. Word has length 157 [2018-09-30 23:29:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:46,766 INFO L225 Difference]: With dead ends: 161 [2018-09-30 23:29:46,766 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 23:29:46,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=12246, Invalid=12246, Unknown=0, NotChecked=0, Total=24492 [2018-09-30 23:29:46,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 23:29:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 23:29:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 23:29:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 23:29:46,770 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 157 [2018-09-30 23:29:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:46,770 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 23:29:46,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 157 states. [2018-09-30 23:29:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 23:29:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 23:29:46,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:46,771 INFO L375 BasicCegarLoop]: trace histogram [155, 1, 1, 1] [2018-09-30 23:29:46,771 INFO L423 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:46,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:46,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1224497096, now seen corresponding path program 155 times [2018-09-30 23:29:46,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:46,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:46,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:46,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:46,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:29:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:55,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:29:55,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:29:55,952 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:29:56,154 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 79 check-sat command(s) [2018-09-30 23:29:56,155 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:29:56,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:29:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 0 proven. 12090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:29:56,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:29:56,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [157, 157] total 157 [2018-09-30 23:29:56,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-09-30 23:29:56,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-09-30 23:29:56,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:29:56,216 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 158 states. [2018-09-30 23:29:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:29:57,059 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2018-09-30 23:29:57,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2018-09-30 23:29:57,060 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-09-30 23:29:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:29:57,061 INFO L225 Difference]: With dead ends: 162 [2018-09-30 23:29:57,061 INFO L226 Difference]: Without dead ends: 160 [2018-09-30 23:29:57,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=12403, Invalid=12403, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 23:29:57,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-30 23:29:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2018-09-30 23:29:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 23:29:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 160 transitions. [2018-09-30 23:29:57,064 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 160 transitions. Word has length 158 [2018-09-30 23:29:57,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:29:57,064 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 160 transitions. [2018-09-30 23:29:57,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-09-30 23:29:57,064 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 160 transitions. [2018-09-30 23:29:57,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-30 23:29:57,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:29:57,064 INFO L375 BasicCegarLoop]: trace histogram [156, 1, 1, 1] [2018-09-30 23:29:57,065 INFO L423 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:29:57,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:29:57,065 INFO L82 PathProgramCache]: Analyzing trace with hash -695297663, now seen corresponding path program 156 times [2018-09-30 23:29:57,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:29:57,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:29:57,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:57,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:29:57,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:29:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:06,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:06,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:06,243 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:30:06,410 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 23:30:06,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:06,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12246 backedges. 0 proven. 12246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:06,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:06,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [158, 158] total 158 [2018-09-30 23:30:06,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 159 states [2018-09-30 23:30:06,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2018-09-30 23:30:06,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 23:30:06,471 INFO L87 Difference]: Start difference. First operand 160 states and 160 transitions. Second operand 159 states. [2018-09-30 23:30:07,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:07,206 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 23:30:07,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2018-09-30 23:30:07,207 INFO L78 Accepts]: Start accepts. Automaton has 159 states. Word has length 159 [2018-09-30 23:30:07,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:07,207 INFO L225 Difference]: With dead ends: 163 [2018-09-30 23:30:07,208 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 23:30:07,209 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=12561, Invalid=12561, Unknown=0, NotChecked=0, Total=25122 [2018-09-30 23:30:07,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 23:30:07,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 23:30:07,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 23:30:07,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 23:30:07,211 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 159 [2018-09-30 23:30:07,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:07,211 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 23:30:07,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 159 states. [2018-09-30 23:30:07,212 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 23:30:07,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 23:30:07,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:07,212 INFO L375 BasicCegarLoop]: trace histogram [157, 1, 1, 1] [2018-09-30 23:30:07,212 INFO L423 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:07,212 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:07,212 INFO L82 PathProgramCache]: Analyzing trace with hash -79393048, now seen corresponding path program 157 times [2018-09-30 23:30:07,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:07,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:07,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:07,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:07,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:16,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:16,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:16,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:16,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12403 backedges. 0 proven. 12403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:16,485 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:16,485 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [159, 159] total 159 [2018-09-30 23:30:16,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 160 states [2018-09-30 23:30:16,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2018-09-30 23:30:16,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:30:16,487 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 160 states. [2018-09-30 23:30:17,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:17,213 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2018-09-30 23:30:17,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2018-09-30 23:30:17,214 INFO L78 Accepts]: Start accepts. Automaton has 160 states. Word has length 160 [2018-09-30 23:30:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:17,214 INFO L225 Difference]: With dead ends: 164 [2018-09-30 23:30:17,215 INFO L226 Difference]: Without dead ends: 162 [2018-09-30 23:30:17,215 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=12720, Invalid=12720, Unknown=0, NotChecked=0, Total=25440 [2018-09-30 23:30:17,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2018-09-30 23:30:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2018-09-30 23:30:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2018-09-30 23:30:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2018-09-30 23:30:17,218 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 160 [2018-09-30 23:30:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:17,218 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2018-09-30 23:30:17,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 160 states. [2018-09-30 23:30:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2018-09-30 23:30:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2018-09-30 23:30:17,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:17,219 INFO L375 BasicCegarLoop]: trace histogram [158, 1, 1, 1] [2018-09-30 23:30:17,219 INFO L423 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:17,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:17,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1833780833, now seen corresponding path program 158 times [2018-09-30 23:30:17,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:17,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:17,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:17,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:30:17,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:26,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:26,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:26,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:30:26,421 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:30:26,421 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:26,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12561 backedges. 0 proven. 12561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:26,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:26,483 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [160, 160] total 160 [2018-09-30 23:30:26,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 161 states [2018-09-30 23:30:26,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2018-09-30 23:30:26,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:30:26,485 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 161 states. [2018-09-30 23:30:27,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:27,228 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 23:30:27,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2018-09-30 23:30:27,229 INFO L78 Accepts]: Start accepts. Automaton has 161 states. Word has length 161 [2018-09-30 23:30:27,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:27,229 INFO L225 Difference]: With dead ends: 165 [2018-09-30 23:30:27,229 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 23:30:27,230 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=12880, Invalid=12880, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 23:30:27,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 23:30:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 23:30:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 23:30:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 23:30:27,232 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 161 [2018-09-30 23:30:27,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:27,232 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 23:30:27,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 161 states. [2018-09-30 23:30:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 23:30:27,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 23:30:27,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:27,233 INFO L375 BasicCegarLoop]: trace histogram [159, 1, 1, 1] [2018-09-30 23:30:27,233 INFO L423 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:27,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:27,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1012629000, now seen corresponding path program 159 times [2018-09-30 23:30:27,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:27,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:27,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:27,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:27,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:36,312 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:36,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:36,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:30:36,682 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2018-09-30 23:30:36,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:36,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 0 proven. 12720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:36,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:36,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [161, 161] total 161 [2018-09-30 23:30:36,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-09-30 23:30:36,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-09-30 23:30:36,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:30:36,743 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 162 states. [2018-09-30 23:30:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:37,658 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2018-09-30 23:30:37,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2018-09-30 23:30:37,658 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-09-30 23:30:37,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:37,659 INFO L225 Difference]: With dead ends: 166 [2018-09-30 23:30:37,659 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 23:30:37,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=13041, Invalid=13041, Unknown=0, NotChecked=0, Total=26082 [2018-09-30 23:30:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 23:30:37,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2018-09-30 23:30:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-09-30 23:30:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 164 transitions. [2018-09-30 23:30:37,664 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 164 transitions. Word has length 162 [2018-09-30 23:30:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:37,664 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 164 transitions. [2018-09-30 23:30:37,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-09-30 23:30:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 164 transitions. [2018-09-30 23:30:37,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 23:30:37,665 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:37,665 INFO L375 BasicCegarLoop]: trace histogram [160, 1, 1, 1] [2018-09-30 23:30:37,665 INFO L423 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:37,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:37,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1326725953, now seen corresponding path program 160 times [2018-09-30 23:30:37,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:37,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:37,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:37,666 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:37,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:47,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:47,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:47,300 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:30:47,386 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:30:47,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:47,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12880 backedges. 0 proven. 12880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:47,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:47,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [162, 162] total 162 [2018-09-30 23:30:47,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 163 states [2018-09-30 23:30:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2018-09-30 23:30:47,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 23:30:47,449 INFO L87 Difference]: Start difference. First operand 164 states and 164 transitions. Second operand 163 states. [2018-09-30 23:30:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:48,401 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 23:30:48,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2018-09-30 23:30:48,402 INFO L78 Accepts]: Start accepts. Automaton has 163 states. Word has length 163 [2018-09-30 23:30:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:48,402 INFO L225 Difference]: With dead ends: 167 [2018-09-30 23:30:48,402 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 23:30:48,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13203, Invalid=13203, Unknown=0, NotChecked=0, Total=26406 [2018-09-30 23:30:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 23:30:48,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 23:30:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 23:30:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-30 23:30:48,406 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 163 [2018-09-30 23:30:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:48,406 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-30 23:30:48,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 163 states. [2018-09-30 23:30:48,406 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-30 23:30:48,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 23:30:48,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:48,407 INFO L375 BasicCegarLoop]: trace histogram [161, 1, 1, 1] [2018-09-30 23:30:48,407 INFO L423 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:48,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:48,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1821170392, now seen corresponding path program 161 times [2018-09-30 23:30:48,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:48,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:48,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:48,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:48,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:30:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:58,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:30:58,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:30:58,015 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:30:58,250 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2018-09-30 23:30:58,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:30:58,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:30:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13041 backedges. 0 proven. 13041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:30:58,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:30:58,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [163, 163] total 163 [2018-09-30 23:30:58,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 164 states [2018-09-30 23:30:58,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2018-09-30 23:30:58,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:30:58,316 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 164 states. [2018-09-30 23:30:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:30:59,263 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-09-30 23:30:59,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2018-09-30 23:30:59,263 INFO L78 Accepts]: Start accepts. Automaton has 164 states. Word has length 164 [2018-09-30 23:30:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:30:59,264 INFO L225 Difference]: With dead ends: 168 [2018-09-30 23:30:59,264 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 23:30:59,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=13366, Invalid=13366, Unknown=0, NotChecked=0, Total=26732 [2018-09-30 23:30:59,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 23:30:59,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 23:30:59,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 23:30:59,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 166 transitions. [2018-09-30 23:30:59,269 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 166 transitions. Word has length 164 [2018-09-30 23:30:59,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:30:59,269 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 166 transitions. [2018-09-30 23:30:59,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 164 states. [2018-09-30 23:30:59,269 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 166 transitions. [2018-09-30 23:30:59,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2018-09-30 23:30:59,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:30:59,270 INFO L375 BasicCegarLoop]: trace histogram [162, 1, 1, 1] [2018-09-30 23:30:59,270 INFO L423 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:30:59,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:30:59,271 INFO L82 PathProgramCache]: Analyzing trace with hash -621709279, now seen corresponding path program 162 times [2018-09-30 23:30:59,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:30:59,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:30:59,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:59,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:30:59,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:30:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:09,151 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:09,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:09,158 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:31:09,340 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2018-09-30 23:31:09,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:09,345 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13203 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:09,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:09,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 164] total 164 [2018-09-30 23:31:09,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 165 states [2018-09-30 23:31:09,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2018-09-30 23:31:09,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 23:31:09,403 INFO L87 Difference]: Start difference. First operand 166 states and 166 transitions. Second operand 165 states. [2018-09-30 23:31:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:10,265 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 23:31:10,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2018-09-30 23:31:10,266 INFO L78 Accepts]: Start accepts. Automaton has 165 states. Word has length 165 [2018-09-30 23:31:10,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:10,266 INFO L225 Difference]: With dead ends: 169 [2018-09-30 23:31:10,267 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 23:31:10,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=13530, Invalid=13530, Unknown=0, NotChecked=0, Total=27060 [2018-09-30 23:31:10,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 23:31:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 23:31:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 23:31:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 23:31:10,271 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 165 [2018-09-30 23:31:10,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:10,271 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 23:31:10,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 165 states. [2018-09-30 23:31:10,271 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 23:31:10,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 23:31:10,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:10,272 INFO L375 BasicCegarLoop]: trace histogram [163, 1, 1, 1] [2018-09-30 23:31:10,272 INFO L423 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:10,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:10,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2093120440, now seen corresponding path program 163 times [2018-09-30 23:31:10,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:10,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:10,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:10,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:10,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:20,342 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:20,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:20,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:31:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:20,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:20,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13366 backedges. 0 proven. 13366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:20,497 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:20,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [165, 165] total 165 [2018-09-30 23:31:20,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-09-30 23:31:20,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-09-30 23:31:20,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:31:20,500 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 166 states. [2018-09-30 23:31:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:21,149 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2018-09-30 23:31:21,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2018-09-30 23:31:21,150 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 166 [2018-09-30 23:31:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:21,150 INFO L225 Difference]: With dead ends: 170 [2018-09-30 23:31:21,150 INFO L226 Difference]: Without dead ends: 168 [2018-09-30 23:31:21,151 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=13695, Invalid=13695, Unknown=0, NotChecked=0, Total=27390 [2018-09-30 23:31:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-09-30 23:31:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-09-30 23:31:21,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-09-30 23:31:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-09-30 23:31:21,154 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 166 [2018-09-30 23:31:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:21,154 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-09-30 23:31:21,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-09-30 23:31:21,154 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-09-30 23:31:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 23:31:21,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:21,155 INFO L375 BasicCegarLoop]: trace histogram [164, 1, 1, 1] [2018-09-30 23:31:21,155 INFO L423 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:21,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:21,155 INFO L82 PathProgramCache]: Analyzing trace with hash -462226175, now seen corresponding path program 164 times [2018-09-30 23:31:21,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:21,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:21,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:21,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:31:21,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:21,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:31,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:31,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:31,065 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:31:31,150 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:31:31,150 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:31,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13530 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:31,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:31,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [166, 166] total 166 [2018-09-30 23:31:31,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 167 states [2018-09-30 23:31:31,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2018-09-30 23:31:31,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:31:31,214 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 167 states. [2018-09-30 23:31:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:31,679 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 23:31:31,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2018-09-30 23:31:31,680 INFO L78 Accepts]: Start accepts. Automaton has 167 states. Word has length 167 [2018-09-30 23:31:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:31,680 INFO L225 Difference]: With dead ends: 171 [2018-09-30 23:31:31,680 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 23:31:31,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=13861, Invalid=13861, Unknown=0, NotChecked=0, Total=27722 [2018-09-30 23:31:31,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 23:31:31,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 23:31:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 23:31:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-30 23:31:31,685 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 167 [2018-09-30 23:31:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:31,685 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-30 23:31:31,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has 167 states. [2018-09-30 23:31:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-30 23:31:31,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 23:31:31,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:31,686 INFO L375 BasicCegarLoop]: trace histogram [165, 1, 1, 1] [2018-09-30 23:31:31,686 INFO L423 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:31,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:31,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1444111512, now seen corresponding path program 165 times [2018-09-30 23:31:31,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:31,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:31,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:31,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:31,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:41,875 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:41,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:41,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:31:42,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 84 check-sat command(s) [2018-09-30 23:31:42,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:42,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13695 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:42,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:42,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 167] total 167 [2018-09-30 23:31:42,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 168 states [2018-09-30 23:31:42,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2018-09-30 23:31:42,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:31:42,159 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 168 states. [2018-09-30 23:31:43,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:43,016 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2018-09-30 23:31:43,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2018-09-30 23:31:43,017 INFO L78 Accepts]: Start accepts. Automaton has 168 states. Word has length 168 [2018-09-30 23:31:43,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:43,017 INFO L225 Difference]: With dead ends: 172 [2018-09-30 23:31:43,017 INFO L226 Difference]: Without dead ends: 170 [2018-09-30 23:31:43,018 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=14028, Invalid=14028, Unknown=0, NotChecked=0, Total=28056 [2018-09-30 23:31:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2018-09-30 23:31:43,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2018-09-30 23:31:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-30 23:31:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 170 transitions. [2018-09-30 23:31:43,020 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 170 transitions. Word has length 168 [2018-09-30 23:31:43,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:43,020 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 170 transitions. [2018-09-30 23:31:43,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 168 states. [2018-09-30 23:31:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 170 transitions. [2018-09-30 23:31:43,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2018-09-30 23:31:43,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:43,021 INFO L375 BasicCegarLoop]: trace histogram [166, 1, 1, 1] [2018-09-30 23:31:43,021 INFO L423 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:43,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:43,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1817785887, now seen corresponding path program 166 times [2018-09-30 23:31:43,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:43,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:43,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:43,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:43,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:31:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:53,048 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:31:53,048 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:31:53,055 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:31:53,144 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:31:53,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:31:53,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:31:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13861 backedges. 0 proven. 13861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:31:53,206 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:31:53,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [168, 168] total 168 [2018-09-30 23:31:53,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 169 states [2018-09-30 23:31:53,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2018-09-30 23:31:53,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-09-30 23:31:53,209 INFO L87 Difference]: Start difference. First operand 170 states and 170 transitions. Second operand 169 states. [2018-09-30 23:31:54,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:31:54,287 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 23:31:54,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2018-09-30 23:31:54,288 INFO L78 Accepts]: Start accepts. Automaton has 169 states. Word has length 169 [2018-09-30 23:31:54,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:31:54,288 INFO L225 Difference]: With dead ends: 173 [2018-09-30 23:31:54,289 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 23:31:54,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=14196, Invalid=14196, Unknown=0, NotChecked=0, Total=28392 [2018-09-30 23:31:54,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 23:31:54,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 23:31:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 23:31:54,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 23:31:54,293 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 169 [2018-09-30 23:31:54,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:31:54,293 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 23:31:54,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 169 states. [2018-09-30 23:31:54,293 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 23:31:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 23:31:54,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:31:54,294 INFO L375 BasicCegarLoop]: trace histogram [167, 1, 1, 1] [2018-09-30 23:31:54,294 INFO L423 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:31:54,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:31:54,294 INFO L82 PathProgramCache]: Analyzing trace with hash -516789624, now seen corresponding path program 167 times [2018-09-30 23:31:54,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:31:54,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:31:54,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:54,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:31:54,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:31:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:04,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:04,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:04,541 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:32:04,763 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-30 23:32:04,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:04,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 0 proven. 14028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:04,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:04,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [169, 169] total 169 [2018-09-30 23:32:04,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-09-30 23:32:04,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-09-30 23:32:04,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:32:04,830 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 170 states. [2018-09-30 23:32:05,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:05,490 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2018-09-30 23:32:05,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2018-09-30 23:32:05,491 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 170 [2018-09-30 23:32:05,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:05,492 INFO L225 Difference]: With dead ends: 174 [2018-09-30 23:32:05,492 INFO L226 Difference]: Without dead ends: 172 [2018-09-30 23:32:05,493 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=14365, Invalid=14365, Unknown=0, NotChecked=0, Total=28730 [2018-09-30 23:32:05,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2018-09-30 23:32:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2018-09-30 23:32:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-30 23:32:05,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2018-09-30 23:32:05,496 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 170 [2018-09-30 23:32:05,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:05,496 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2018-09-30 23:32:05,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-09-30 23:32:05,496 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2018-09-30 23:32:05,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-30 23:32:05,497 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:05,497 INFO L375 BasicCegarLoop]: trace histogram [168, 1, 1, 1] [2018-09-30 23:32:05,497 INFO L423 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:05,497 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:05,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1159388865, now seen corresponding path program 168 times [2018-09-30 23:32:05,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:05,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:05,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:05,498 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:05,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:15,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:15,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:15,911 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:32:16,102 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 23:32:16,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:16,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14196 backedges. 0 proven. 14196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:16,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:16,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [170, 170] total 170 [2018-09-30 23:32:16,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 171 states [2018-09-30 23:32:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2018-09-30 23:32:16,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-09-30 23:32:16,168 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 171 states. [2018-09-30 23:32:16,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:16,817 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 23:32:16,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-09-30 23:32:16,817 INFO L78 Accepts]: Start accepts. Automaton has 171 states. Word has length 171 [2018-09-30 23:32:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:16,818 INFO L225 Difference]: With dead ends: 175 [2018-09-30 23:32:16,818 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 23:32:16,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=14535, Invalid=14535, Unknown=0, NotChecked=0, Total=29070 [2018-09-30 23:32:16,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 23:32:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 23:32:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 23:32:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-30 23:32:16,822 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 171 [2018-09-30 23:32:16,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:16,823 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-30 23:32:16,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 171 states. [2018-09-30 23:32:16,823 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-30 23:32:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 23:32:16,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:16,823 INFO L375 BasicCegarLoop]: trace histogram [169, 1, 1, 1] [2018-09-30 23:32:16,823 INFO L423 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:16,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:16,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1581314472, now seen corresponding path program 169 times [2018-09-30 23:32:16,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:16,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:16,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:16,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:16,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:27,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:27,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:27,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:27,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:27,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14365 backedges. 0 proven. 14365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:27,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:27,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [171, 171] total 171 [2018-09-30 23:32:27,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 172 states [2018-09-30 23:32:27,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2018-09-30 23:32:27,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 23:32:27,451 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 172 states. [2018-09-30 23:32:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:28,531 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2018-09-30 23:32:28,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2018-09-30 23:32:28,532 INFO L78 Accepts]: Start accepts. Automaton has 172 states. Word has length 172 [2018-09-30 23:32:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:28,532 INFO L225 Difference]: With dead ends: 176 [2018-09-30 23:32:28,532 INFO L226 Difference]: Without dead ends: 174 [2018-09-30 23:32:28,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=14706, Invalid=14706, Unknown=0, NotChecked=0, Total=29412 [2018-09-30 23:32:28,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-30 23:32:28,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2018-09-30 23:32:28,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2018-09-30 23:32:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 174 transitions. [2018-09-30 23:32:28,535 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 174 transitions. Word has length 172 [2018-09-30 23:32:28,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:28,535 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 174 transitions. [2018-09-30 23:32:28,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 172 states. [2018-09-30 23:32:28,536 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 174 transitions. [2018-09-30 23:32:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 23:32:28,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:28,536 INFO L375 BasicCegarLoop]: trace histogram [170, 1, 1, 1] [2018-09-30 23:32:28,536 INFO L423 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:28,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:28,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1776106401, now seen corresponding path program 170 times [2018-09-30 23:32:28,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:28,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:28,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:28,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:32:28,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:39,306 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:39,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:39,315 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:32:39,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:32:39,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:39,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14535 backedges. 0 proven. 14535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:39,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:39,471 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [172, 172] total 172 [2018-09-30 23:32:39,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 173 states [2018-09-30 23:32:39,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2018-09-30 23:32:39,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-09-30 23:32:39,473 INFO L87 Difference]: Start difference. First operand 174 states and 174 transitions. Second operand 173 states. [2018-09-30 23:32:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:40,041 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 23:32:40,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2018-09-30 23:32:40,041 INFO L78 Accepts]: Start accepts. Automaton has 173 states. Word has length 173 [2018-09-30 23:32:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:40,042 INFO L225 Difference]: With dead ends: 177 [2018-09-30 23:32:40,042 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 23:32:40,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=14878, Invalid=14878, Unknown=0, NotChecked=0, Total=29756 [2018-09-30 23:32:40,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 23:32:40,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 23:32:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 23:32:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 23:32:40,046 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 173 [2018-09-30 23:32:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:40,046 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 23:32:40,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 173 states. [2018-09-30 23:32:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 23:32:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 23:32:40,047 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:40,047 INFO L375 BasicCegarLoop]: trace histogram [171, 1, 1, 1] [2018-09-30 23:32:40,047 INFO L423 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:40,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:40,048 INFO L82 PathProgramCache]: Analyzing trace with hash -775278392, now seen corresponding path program 171 times [2018-09-30 23:32:40,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:40,048 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:40,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:40,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:40,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:32:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:51,002 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:32:51,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:32:51,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:32:51,224 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 87 check-sat command(s) [2018-09-30 23:32:51,224 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:32:51,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:32:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14706 backedges. 0 proven. 14706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:32:51,287 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:32:51,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [173, 173] total 173 [2018-09-30 23:32:51,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-09-30 23:32:51,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-09-30 23:32:51,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-09-30 23:32:51,290 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 174 states. [2018-09-30 23:32:52,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:32:52,382 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-09-30 23:32:52,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2018-09-30 23:32:52,383 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 174 [2018-09-30 23:32:52,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:32:52,384 INFO L225 Difference]: With dead ends: 178 [2018-09-30 23:32:52,384 INFO L226 Difference]: Without dead ends: 176 [2018-09-30 23:32:52,385 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=15051, Invalid=15051, Unknown=0, NotChecked=0, Total=30102 [2018-09-30 23:32:52,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-30 23:32:52,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-30 23:32:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-30 23:32:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 176 transitions. [2018-09-30 23:32:52,388 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 176 transitions. Word has length 174 [2018-09-30 23:32:52,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:32:52,388 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 176 transitions. [2018-09-30 23:32:52,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-09-30 23:32:52,388 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 176 transitions. [2018-09-30 23:32:52,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2018-09-30 23:32:52,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:32:52,389 INFO L375 BasicCegarLoop]: trace histogram [172, 1, 1, 1] [2018-09-30 23:32:52,389 INFO L423 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:32:52,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:32:52,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1736171649, now seen corresponding path program 172 times [2018-09-30 23:32:52,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:32:52,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:32:52,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:52,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:32:52,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:32:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:03,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:03,233 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:03,239 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:33:03,330 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:33:03,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:03,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14878 backedges. 0 proven. 14878 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:03,390 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:33:03,390 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [174, 174] total 174 [2018-09-30 23:33:03,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 175 states [2018-09-30 23:33:03,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2018-09-30 23:33:03,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-09-30 23:33:03,392 INFO L87 Difference]: Start difference. First operand 176 states and 176 transitions. Second operand 175 states. [2018-09-30 23:33:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:33:04,178 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 23:33:04,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2018-09-30 23:33:04,178 INFO L78 Accepts]: Start accepts. Automaton has 175 states. Word has length 175 [2018-09-30 23:33:04,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:33:04,179 INFO L225 Difference]: With dead ends: 179 [2018-09-30 23:33:04,179 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 23:33:04,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=15225, Invalid=15225, Unknown=0, NotChecked=0, Total=30450 [2018-09-30 23:33:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 23:33:04,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 23:33:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 23:33:04,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-30 23:33:04,182 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 175 [2018-09-30 23:33:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:33:04,183 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-30 23:33:04,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 175 states. [2018-09-30 23:33:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-30 23:33:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 23:33:04,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:33:04,183 INFO L375 BasicCegarLoop]: trace histogram [173, 1, 1, 1] [2018-09-30 23:33:04,183 INFO L423 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:33:04,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:33:04,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2013255704, now seen corresponding path program 173 times [2018-09-30 23:33:04,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:33:04,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:33:04,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:04,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:33:04,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:33:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:33:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15051 backedges. 0 proven. 15051 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:33:15,114 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:33:15,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:15,122 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... [2018-09-30 23:33:15,373 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 88 check-sat command(s) [2018-09-30 23:33:15,374 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:33:15,380 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:33:15,381 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-09-30 23:33:15,582 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:33:15,582 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 23:33:15,587 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 23:33:15,588 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 11:33:15 BoogieIcfgContainer [2018-09-30 23:33:15,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 23:33:15,588 INFO L168 Benchmark]: Toolchain (without parser) took 758617.35 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -212.3 MB). Free memory was 1.5 GB in the beginning and 923.2 MB in the end (delta: 539.8 MB). Peak memory consumption was 327.5 MB. Max. memory is 7.1 GB. [2018-09-30 23:33:15,590 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 23:33:15,590 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.78 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 23:33:15,590 INFO L168 Benchmark]: Boogie Preprocessor took 21.11 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 23:33:15,590 INFO L168 Benchmark]: RCFGBuilder took 278.88 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 23:33:15,591 INFO L168 Benchmark]: TraceAbstraction took 758269.24 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -212.3 MB). Free memory was 1.4 GB in the beginning and 923.2 MB in the end (delta: 518.7 MB). Peak memory consumption was 306.3 MB. Max. memory is 7.1 GB. [2018-09-30 23:33:15,592 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.78 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 21.11 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 278.88 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 758269.24 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -212.3 MB). Free memory was 1.4 GB in the beginning and 923.2 MB in the end (delta: 518.7 MB). Peak memory consumption was 306.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 177 with TraceHistMax 173, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 758.1s OverallTime, 174 OverallIterations, 173 TraceHistogramMax, 58.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 519 SDtfs, 0 SDslu, 8990 SDs, 0 SdLazy, 24214 SolverSat, 337 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30446 GetRequests, 15395 SyntacticMatches, 0 SemanticMatches, 15051 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 657.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=177occurred in iteration=173, 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: 0.4s AutomataMinimizationTime, 173 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 13.3s SatisfiabilityAnalysisTime, 666.0s InterpolantComputationTime, 30791 NumberOfCodeBlocks, 30791 NumberOfCodeBlocksAsserted, 4115 NumberOfCheckSat, 30446 ConstructedInterpolants, 0 QuantifiedInterpolants, 10566140 SizeOfPredicates, 172 NumberOfNonLiveVariables, 62608 ConjunctsInSsa, 15222 ConjunctsInUnsatCore, 345 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1725848 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/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_23-33-15-601.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_23-33-15-601.csv Completed graceful shutdown